mirror of
https://github.com/KevinMidboe/linguist.git
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736 lines
29 KiB
Plaintext
736 lines
29 KiB
Plaintext
''***************************************
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''* PS/2 Keyboard Driver v1.0.1 *
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''* Author: Chip Gracey *
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''* Copyright (c) 2004 Parallax, Inc. *
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''* See end of file for terms of use. *
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''***************************************
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{-----------------REVISION HISTORY-----------------
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v1.0.1 - Updated 6/15/2006 to work with Propeller Tool 0.96}
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VAR
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long cog
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long par_tail 'key buffer tail read/write (19 contiguous longs)
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long par_head 'key buffer head read-only
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long par_present 'keyboard present read-only
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long par_states[8] 'key states (256 bits) read-only
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long par_keys[8] 'key buffer (16 words) read-only (also used to pass initial parameters)
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PUB start(dpin, cpin) : okay
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'' Start keyboard driver - starts a cog
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'' returns false if no cog available
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''
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'' dpin = data signal on PS/2 jack
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'' cpin = clock signal on PS/2 jack
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''
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'' use 100-ohm resistors between pins and jack
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'' use 10K-ohm resistors to pull jack-side signals to VDD
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'' connect jack-power to 5V, jack-gnd to VSS
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''
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'' all lock-keys will be enabled, NumLock will be initially 'on',
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'' and auto-repeat will be set to 15cps with a delay of .5s
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okay := startx(dpin, cpin, %0_000_100, %01_01000)
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PUB startx(dpin, cpin, locks, auto) : okay
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'' Like start, but allows you to specify lock settings and auto-repeat
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''
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'' locks = lock setup
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'' bit 6 disallows shift-alphas (case set soley by CapsLock)
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'' bits 5..3 disallow toggle of NumLock/CapsLock/ScrollLock state
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'' bits 2..0 specify initial state of NumLock/CapsLock/ScrollLock
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'' (eg. %0_001_100 = disallow ScrollLock, NumLock initially 'on')
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''
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'' auto = auto-repeat setup
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'' bits 6..5 specify delay (0=.25s, 1=.5s, 2=.75s, 3=1s)
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'' bits 4..0 specify repeat rate (0=30cps..31=2cps)
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'' (eg %01_00000 = .5s delay, 30cps repeat)
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stop
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longmove(@par_keys, @dpin, 4)
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okay := cog := cognew(@entry, @par_tail) + 1
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PUB stop
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'' Stop keyboard driver - frees a cog
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if cog
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cogstop(cog~ - 1)
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longfill(@par_tail, 0, 19)
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PUB present : truefalse
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'' Check if keyboard present - valid ~2s after start
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'' returns t|f
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truefalse := -par_present
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PUB key : keycode
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'' Get key (never waits)
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'' returns key (0 if buffer empty)
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if par_tail <> par_head
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keycode := par_keys.word[par_tail]
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par_tail := ++par_tail & $F
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PUB getkey : keycode
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'' Get next key (may wait for keypress)
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'' returns key
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repeat until (keycode := key)
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PUB newkey : keycode
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'' Clear buffer and get new key (always waits for keypress)
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'' returns key
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par_tail := par_head
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keycode := getkey
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PUB gotkey : truefalse
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'' Check if any key in buffer
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'' returns t|f
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truefalse := par_tail <> par_head
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PUB clearkeys
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'' Clear key buffer
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par_tail := par_head
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PUB keystate(k) : state
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'' Get the state of a particular key
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'' returns t|f
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state := -(par_states[k >> 5] >> k & 1)
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DAT
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'******************************************
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'* Assembly language PS/2 keyboard driver *
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'******************************************
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org
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'
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'
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' Entry
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'
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entry movd :par,#_dpin 'load input parameters _dpin/_cpin/_locks/_auto
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mov x,par
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add x,#11*4
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mov y,#4
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:par rdlong 0,x
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add :par,dlsb
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add x,#4
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djnz y,#:par
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mov dmask,#1 'set pin masks
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shl dmask,_dpin
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mov cmask,#1
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shl cmask,_cpin
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test _dpin,#$20 wc 'modify port registers within code
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muxc _d1,dlsb
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muxc _d2,dlsb
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muxc _d3,#1
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muxc _d4,#1
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test _cpin,#$20 wc
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muxc _c1,dlsb
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muxc _c2,dlsb
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muxc _c3,#1
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mov _head,#0 'reset output parameter _head
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'
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'
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' Reset keyboard
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'
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reset mov dira,#0 'reset directions
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mov dirb,#0
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movd :par,#_present 'reset output parameters _present/_states[8]
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mov x,#1+8
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:par mov 0,#0
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add :par,dlsb
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djnz x,#:par
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mov stat,#8 'set reset flag
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'
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'
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' Update parameters
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'
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update movd :par,#_head 'update output parameters _head/_present/_states[8]
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mov x,par
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add x,#1*4
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mov y,#1+1+8
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:par wrlong 0,x
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add :par,dlsb
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add x,#4
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djnz y,#:par
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test stat,#8 wc 'if reset flag, transmit reset command
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if_c mov data,#$FF
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if_c call #transmit
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'
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'
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' Get scancode
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'
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newcode mov stat,#0 'reset state
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:same call #receive 'receive byte from keyboard
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cmp data,#$83+1 wc 'scancode?
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if_nc cmp data,#$AA wz 'powerup/reset?
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if_nc_and_z jmp #configure
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if_nc cmp data,#$E0 wz 'extended?
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if_nc_and_z or stat,#1
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if_nc_and_z jmp #:same
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if_nc cmp data,#$F0 wz 'released?
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if_nc_and_z or stat,#2
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if_nc_and_z jmp #:same
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if_nc jmp #newcode 'unknown, ignore
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'
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'
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' Translate scancode and enter into buffer
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'
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test stat,#1 wc 'lookup code with extended flag
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rcl data,#1
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call #look
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cmp data,#0 wz 'if unknown, ignore
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if_z jmp #newcode
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mov t,_states+6 'remember lock keys in _states
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mov x,data 'set/clear key bit in _states
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shr x,#5
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add x,#_states
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movd :reg,x
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mov y,#1
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shl y,data
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test stat,#2 wc
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:reg muxnc 0,y
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if_nc cmpsub data,#$F0 wc 'if released or shift/ctrl/alt/win, done
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if_c jmp #update
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mov y,_states+7 'get shift/ctrl/alt/win bit pairs
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shr y,#16
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cmpsub data,#$E0 wc 'translate keypad, considering numlock
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if_c test _locks,#%100 wz
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if_c_and_z add data,#@keypad1-@table
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if_c_and_nz add data,#@keypad2-@table
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if_c call #look
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if_c jmp #:flags
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cmpsub data,#$DD wc 'handle scrlock/capslock/numlock
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if_c mov x,#%001_000
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if_c shl x,data
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if_c andn x,_locks
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if_c shr x,#3
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if_c shr t,#29 'ignore auto-repeat
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if_c andn x,t wz
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if_c xor _locks,x
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if_c add data,#$DD
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if_c_and_nz or stat,#4 'if change, set configure flag to update leds
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test y,#%11 wz 'get shift into nz
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if_nz cmp data,#$60+1 wc 'check shift1
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if_nz_and_c cmpsub data,#$5B wc
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if_nz_and_c add data,#@shift1-@table
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if_nz_and_c call #look
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if_nz_and_c andn y,#%11
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if_nz cmp data,#$3D+1 wc 'check shift2
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if_nz_and_c cmpsub data,#$27 wc
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if_nz_and_c add data,#@shift2-@table
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if_nz_and_c call #look
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if_nz_and_c andn y,#%11
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test _locks,#%010 wc 'check shift-alpha, considering capslock
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muxnc :shift,#$20
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test _locks,#$40 wc
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if_nz_and_nc xor :shift,#$20
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cmp data,#"z"+1 wc
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if_c cmpsub data,#"a" wc
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:shift if_c add data,#"A"
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if_c andn y,#%11
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:flags ror data,#8 'add shift/ctrl/alt/win flags
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mov x,#4 '+$100 if shift
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:loop test y,#%11 wz '+$200 if ctrl
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shr y,#2 '+$400 if alt
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if_nz or data,#1 '+$800 if win
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ror data,#1
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djnz x,#:loop
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rol data,#12
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rdlong x,par 'if room in buffer and key valid, enter
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sub x,#1
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and x,#$F
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cmp x,_head wz
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if_nz test data,#$FF wz
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if_nz mov x,par
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if_nz add x,#11*4
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if_nz add x,_head
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if_nz add x,_head
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if_nz wrword data,x
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if_nz add _head,#1
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if_nz and _head,#$F
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test stat,#4 wc 'if not configure flag, done
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if_nc jmp #update 'else configure to update leds
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'
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'
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' Configure keyboard
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'
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configure mov data,#$F3 'set keyboard auto-repeat
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call #transmit
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mov data,_auto
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and data,#%11_11111
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call #transmit
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mov data,#$ED 'set keyboard lock-leds
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call #transmit
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mov data,_locks
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rev data,#-3 & $1F
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test data,#%100 wc
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rcl data,#1
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and data,#%111
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call #transmit
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mov x,_locks 'insert locks into _states
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and x,#%111
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shl _states+7,#3
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or _states+7,x
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ror _states+7,#3
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mov _present,#1 'set _present
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jmp #update 'done
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'
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'
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' Lookup byte in table
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'
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look ror data,#2 'perform lookup
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movs :reg,data
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add :reg,#table
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shr data,#27
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mov x,data
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:reg mov data,0
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shr data,x
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jmp #rand 'isolate byte
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'
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'
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' Transmit byte to keyboard
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'
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transmit
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_c1 or dira,cmask 'pull clock low
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movs napshr,#13 'hold clock for ~128us (must be >100us)
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call #nap
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_d1 or dira,dmask 'pull data low
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movs napshr,#18 'hold data for ~4us
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call #nap
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_c2 xor dira,cmask 'release clock
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test data,#$0FF wc 'append parity and stop bits to byte
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muxnc data,#$100
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or data,dlsb
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mov x,#10 'ready 10 bits
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transmit_bit call #wait_c0 'wait until clock low
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shr data,#1 wc 'output data bit
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_d2 muxnc dira,dmask
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mov wcond,c1 'wait until clock high
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call #wait
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djnz x,#transmit_bit 'another bit?
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mov wcond,c0d0 'wait until clock and data low
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call #wait
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mov wcond,c1d1 'wait until clock and data high
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call #wait
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call #receive_ack 'receive ack byte with timed wait
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cmp data,#$FA wz 'if ack error, reset keyboard
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if_nz jmp #reset
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transmit_ret ret
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'
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'
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' Receive byte from keyboard
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'
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receive test _cpin,#$20 wc 'wait indefinitely for initial clock low
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waitpne cmask,cmask
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receive_ack
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mov x,#11 'ready 11 bits
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receive_bit call #wait_c0 'wait until clock low
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movs napshr,#16 'pause ~16us
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call #nap
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_d3 test dmask,ina wc 'input data bit
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rcr data,#1
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mov wcond,c1 'wait until clock high
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call #wait
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djnz x,#receive_bit 'another bit?
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shr data,#22 'align byte
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test data,#$1FF wc 'if parity error, reset keyboard
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if_nc jmp #reset
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rand and data,#$FF 'isolate byte
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look_ret
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receive_ack_ret
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receive_ret ret
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'
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'
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' Wait for clock/data to be in required state(s)
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'
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wait_c0 mov wcond,c0 '(wait until clock low)
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wait mov y,tenms 'set timeout to 10ms
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wloop movs napshr,#18 'nap ~4us
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call #nap
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_c3 test cmask,ina wc 'check required state(s)
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_d4 test dmask,ina wz 'loop until got state(s) or timeout
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wcond if_never djnz y,#wloop '(replaced with c0/c1/c0d0/c1d1)
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tjz y,#reset 'if timeout, reset keyboard
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wait_ret
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wait_c0_ret ret
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c0 if_c djnz y,#wloop '(if_never replacements)
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c1 if_nc djnz y,#wloop
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c0d0 if_c_or_nz djnz y,#wloop
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c1d1 if_nc_or_z djnz y,#wloop
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'
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'
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' Nap
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'
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nap rdlong t,#0 'get clkfreq
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napshr shr t,#18/16/13 'shr scales time
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min t,#3 'ensure waitcnt won't snag
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add t,cnt 'add cnt to time
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waitcnt t,#0 'wait until time elapses (nap)
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nap_ret ret
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'
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'
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' Initialized data
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'
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'
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dlsb long 1 << 9
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tenms long 10_000 / 4
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'
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'
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' Lookup table
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' ascii scan extkey regkey ()=keypad
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'
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table word $0000 '00
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word $00D8 '01 F9
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word $0000 '02
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word $00D4 '03 F5
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word $00D2 '04 F3
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word $00D0 '05 F1
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word $00D1 '06 F2
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word $00DB '07 F12
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word $0000 '08
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word $00D9 '09 F10
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word $00D7 '0A F8
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word $00D5 '0B F6
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word $00D3 '0C F4
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word $0009 '0D Tab
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word $0060 '0E `
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word $0000 '0F
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word $0000 '10
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word $F5F4 '11 Alt-R Alt-L
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word $00F0 '12 Shift-L
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word $0000 '13
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word $F3F2 '14 Ctrl-R Ctrl-L
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word $0071 '15 q
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word $0031 '16 1
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word $0000 '17
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word $0000 '18
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word $0000 '19
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word $007A '1A z
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word $0073 '1B s
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word $0061 '1C a
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word $0077 '1D w
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word $0032 '1E 2
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word $F600 '1F Win-L
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word $0000 '20
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word $0063 '21 c
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word $0078 '22 x
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word $0064 '23 d
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word $0065 '24 e
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word $0034 '25 4
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word $0033 '26 3
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word $F700 '27 Win-R
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word $0000 '28
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word $0020 '29 Space
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word $0076 '2A v
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word $0066 '2B f
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word $0074 '2C t
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word $0072 '2D r
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word $0035 '2E 5
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word $CC00 '2F Apps
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word $0000 '30
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word $006E '31 n
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word $0062 '32 b
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word $0068 '33 h
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word $0067 '34 g
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word $0079 '35 y
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word $0036 '36 6
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word $CD00 '37 Power
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word $0000 '38
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word $0000 '39
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word $006D '3A m
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word $006A '3B j
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word $0075 '3C u
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word $0037 '3D 7
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word $0038 '3E 8
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word $CE00 '3F Sleep
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word $0000 '40
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word $002C '41 ,
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word $006B '42 k
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word $0069 '43 i
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word $006F '44 o
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word $0030 '45 0
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word $0039 '46 9
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word $0000 '47
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word $0000 '48
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word $002E '49 .
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word $EF2F '4A (/) /
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word $006C '4B l
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word $003B '4C ;
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word $0070 '4D p
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word $002D '4E -
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word $0000 '4F
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word $0000 '50
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word $0000 '51
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word $0027 '52 '
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word $0000 '53
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word $005B '54 [
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word $003D '55 =
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word $0000 '56
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word $0000 '57
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word $00DE '58 CapsLock
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word $00F1 '59 Shift-R
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word $EB0D '5A (Enter) Enter
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word $005D '5B ]
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word $0000 '5C
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word $005C '5D \
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word $CF00 '5E WakeUp
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word $0000 '5F
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word $0000 '60
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word $0000 '61
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word $0000 '62
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word $0000 '63
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word $0000 '64
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word $0000 '65
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word $00C8 '66 BackSpace
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|
word $0000 '67
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|
word $0000 '68
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|
word $C5E1 '69 End (1)
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|
word $0000 '6A
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|
word $C0E4 '6B Left (4)
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|
word $C4E7 '6C Home (7)
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|
word $0000 '6D
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word $0000 '6E
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word $0000 '6F
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word $CAE0 '70 Insert (0)
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word $C9EA '71 Delete (.)
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word $C3E2 '72 Down (2)
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|
word $00E5 '73 (5)
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word $C1E6 '74 Right (6)
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|
word $C2E8 '75 Up (8)
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|
word $00CB '76 Esc
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|
word $00DF '77 NumLock
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|
word $00DA '78 F11
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|
word $00EC '79 (+)
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|
word $C7E3 '7A PageDn (3)
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|
word $00ED '7B (-)
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|
word $DCEE '7C PrScr (*)
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|
word $C6E9 '7D PageUp (9)
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|
word $00DD '7E ScrLock
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|
word $0000 '7F
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|
word $0000 '80
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word $0000 '81
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word $0000 '82
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word $00D6 '83 F7
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keypad1 byte $CA, $C5, $C3, $C7, $C0, 0, $C1, $C4, $C2, $C6, $C9, $0D, "+-*/"
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keypad2 byte "0123456789.", $0D, "+-*/"
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shift1 byte "{|}", 0, 0, "~"
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shift2 byte $22, 0, 0, 0, 0, "<_>?)!@#$%^&*(", 0, ":", 0, "+"
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'
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|
'
|
|
' Uninitialized data
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|
'
|
|
dmask res 1
|
|
cmask res 1
|
|
stat res 1
|
|
data res 1
|
|
x res 1
|
|
y res 1
|
|
t res 1
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|
|
|
_head res 1 'write-only
|
|
_present res 1 'write-only
|
|
_states res 8 'write-only
|
|
_dpin res 1 'read-only at start
|
|
_cpin res 1 'read-only at start
|
|
_locks res 1 'read-only at start
|
|
_auto res 1 'read-only at start
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|
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''
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|
''
|
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'' _________
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|
'' Key Codes
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''
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'' 00..DF = keypress and keystate
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'' E0..FF = keystate only
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''
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|
''
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|
'' 09 Tab
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|
'' 0D Enter
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'' 20 Space
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'' 21 !
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|
'' 22 "
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|
'' 23 #
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|
'' 24 $
|
|
'' 25 %
|
|
'' 26 &
|
|
'' 27 '
|
|
'' 28 (
|
|
'' 29 )
|
|
'' 2A *
|
|
'' 2B +
|
|
'' 2C ,
|
|
'' 2D -
|
|
'' 2E .
|
|
'' 2F /
|
|
'' 30 0..9
|
|
'' 3A :
|
|
'' 3B ;
|
|
'' 3C <
|
|
'' 3D =
|
|
'' 3E >
|
|
'' 3F ?
|
|
'' 40 @
|
|
'' 41..5A A..Z
|
|
'' 5B [
|
|
'' 5C \
|
|
'' 5D ]
|
|
'' 5E ^
|
|
'' 5F _
|
|
'' 60 `
|
|
'' 61..7A a..z
|
|
'' 7B {
|
|
'' 7C |
|
|
'' 7D }
|
|
'' 7E ~
|
|
''
|
|
'' 80-BF (future international character support)
|
|
''
|
|
'' C0 Left Arrow
|
|
'' C1 Right Arrow
|
|
'' C2 Up Arrow
|
|
'' C3 Down Arrow
|
|
'' C4 Home
|
|
'' C5 End
|
|
'' C6 Page Up
|
|
'' C7 Page Down
|
|
'' C8 Backspace
|
|
'' C9 Delete
|
|
'' CA Insert
|
|
'' CB Esc
|
|
'' CC Apps
|
|
'' CD Power
|
|
'' CE Sleep
|
|
'' CF Wakeup
|
|
''
|
|
'' D0..DB F1..F12
|
|
'' DC Print Screen
|
|
'' DD Scroll Lock
|
|
'' DE Caps Lock
|
|
'' DF Num Lock
|
|
''
|
|
'' E0..E9 Keypad 0..9
|
|
'' EA Keypad .
|
|
'' EB Keypad Enter
|
|
'' EC Keypad +
|
|
'' ED Keypad -
|
|
'' EE Keypad *
|
|
'' EF Keypad /
|
|
''
|
|
'' F0 Left Shift
|
|
'' F1 Right Shift
|
|
'' F2 Left Ctrl
|
|
'' F3 Right Ctrl
|
|
'' F4 Left Alt
|
|
'' F5 Right Alt
|
|
'' F6 Left Win
|
|
'' F7 Right Win
|
|
''
|
|
'' FD Scroll Lock State
|
|
'' FE Caps Lock State
|
|
'' FF Num Lock State
|
|
''
|
|
'' +100 if Shift
|
|
'' +200 if Ctrl
|
|
'' +400 if Alt
|
|
'' +800 if Win
|
|
''
|
|
'' eg. Ctrl-Alt-Delete = $6C9
|
|
''
|
|
''
|
|
'' Note: Driver will buffer up to 15 keystrokes, then ignore overflow.
|
|
|
|
{{
|
|
|
|
┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
|
|
│ TERMS OF USE: MIT License │
|
|
├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
|
|
│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation │
|
|
│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, │
|
|
│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
|
|
│is furnished to do so, subject to the following conditions: │
|
|
│ │
|
|
│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
|
|
│ │
|
|
│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE │
|
|
│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR │
|
|
│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
|
|
│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
|
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
|
|
}} |