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https://github.com/bobbimanners/Applecorn.git
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Initial tweeks to *KEY
Added entry for *SHOW. *KEY and *SHOW can use OSxxx variables that are already allocated. Initial update to use OSDECNUM for key number. Minor optimisations to KEYxxx and KBDxxx routines.
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@ -36,6 +36,8 @@
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* 12-Dec-2022 Test code to write *KEY data to mainmem.
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* 24-Dec-2022 Minor bit of tidying.
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* 26-Dec-2022 Integrated ADB extended keyboard keys.
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* 27-Dec-2022 Bobbi's keyboard uses $60+n extended keys.
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* TO DO: Need to special-case RAlt-2, RAlt-6 when RAlt also holds Ctrl.
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* Hardware locations
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@ -120,8 +122,9 @@ KBDINIT LDX #DEFBYTEEND-DEFBYTE-1
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LDA #$80 ; Keypad keys are function keys
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STA FXKEYPADBASE
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JSR SOFTKEYCHK ; Clear soft keys
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LDX #$C3 ; Default KBD=Native, MODE=3
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STX FX254VAR ; b7-b4=default KBD map, b3-b0=default MODE
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* LDX #$83 ; Default KBD=Native, MODE=3
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* STX FX254VAR ; b7-b4=default KBD map, b3-b0=default MODE
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LDX #$03 ; Default MODE=3 (map already <$C0 by startup)
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BIT SETV ; Set V
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JSR KBDTEST ; Test if key being pressed
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BCS :KBDINITOK ; Return default MODE
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@ -269,6 +272,11 @@ NEGCALL >>> XF2MAIN,MACHRD ; Try to read Machine ID
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* SOFT KEY PROCESSING
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* ===================
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OSDECNUM EQU OSTEMP
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* *SHOW (<num>)
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* -------------
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STARSHOW RTS
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* *KEY <num> <GSTRANS string>
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* ---------------------------
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@ -290,42 +298,24 @@ ERRKEYUSED BRK
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* out halfway through inserting a string, and we mustn't
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* have mainmem paged in while parsing the string as the
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* string might be "underneath" the memory we've paged in,
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* we don't know how long the new definition is and if
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* it will fit into memory until after we've parsed it, so
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* we either have to store it to a temp area or parse it
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* twice.
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* we don't know how long the new definition is and if it
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* will fit into memory until after we've parsed it, so we
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* either have to store it to a temp area or parse it twice.
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*
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* All this, and we need a structure that is reasonably coded,
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* but with the priority to be easy for KEYREAD to extract
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* from (as called more often), even if at expense of storing
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* being more complex.
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*
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* Optimisations:
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* BBC doesn't care if the new definition is valid, it removes
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* the current definition before parsing, so a parse error
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* results in the definition being cleared.
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* eg *KEY 1 HELLO, *KEY 1 X gives Bad string and key 1=""
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* Soft key definition layout:
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* FKEYLENS+n - length of key n
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* FKEYBUF+n - start of key n where x=SUM(len(0)...len(n-1))
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*
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* BBC uses (simplified):
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* SOFTBUF+key+0 -> start of definition
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* SOFTBUF+key+1 -> after last byte of definition
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* SOFTBUF+16 -> free space after end of last definition
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* definitions stored in order of creation
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* SCANDEC stores number in OSDECNUM, so we can keep it there
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* We also have OSKBDx variables available for shuffling code
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*
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* Master uses:
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* SOFTBUF+key -> lo.start of definition
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* SOFTBUF+key+17 -> hi.start of definition
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* SOFTBUF+key+1 -> lo.after last byte definition
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* SOFTBUF+key+18 -> hi.after last byte definition
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* SOFTBUF+16/33 -> free space after last byte last definition
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* definitions stored in key order
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*
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* Initial development layout:
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* 00..0F -> length of string 0..15
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* 10... -> strings in key order
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* (len0+len1+...len15) => start of free space
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*
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STARKEY1 STA FKEYNUM ; Key number being defined
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STARKEY1
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* STA FKEYNUM ; Key number being defined
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JSR KEYOPENGAP
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JSR SKIPCOMMA
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SEC
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@ -339,7 +329,8 @@ STARKEYLP1 JSR GSREAD
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INX
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CPX MOVEDST ; See if we are out of space
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BNE STARKEYLP1
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LDX FKEYNUM
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* LDX FKEYNUM
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LDX OSDECNUM
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>>> WRTMAIN ; Write main memory
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STZ FKEYLENS,X ; Out of space. Set len=0
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>>> WRTAUX ; Back to writing aux again
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@ -347,13 +338,14 @@ STARKEYLP1 JSR GSREAD
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STARKEYEND TXA ; Last idx+1
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SEC ; Compute length
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SBC KEYINS
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LDX FKEYNUM
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* LDX FKEYNUM
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LDX OSDECNUM
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>>> WRTMAIN ; Write main memory
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STA FKEYLENS,X ; Store length of new def
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>>> WRTAUX ; Back to writing aux again
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STARKEYCLS JSR KEYCLSGAP
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RTS
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FKEYNUM DB $00
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* FKEYNUM DB $00
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KEYINS DB $00
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@ -363,10 +355,12 @@ KEYINS DB $00
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KEYOPENGAP PHA
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PHX
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PHY
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LDX FKEYNUM ; Key being defined
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* LDX FKEYNUM ; Key being defined
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LDX OSDECNUM
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JSR KEYSUMLENS ; Len of defs 0..X exclusive
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STA KEYINS ; Offset for insert
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LDX FKEYNUM ; Key being defined
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* LDX FKEYNUM ; Key being defined
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LDX OSDECNUM
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INX
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JSR KEYSUMLENS ; Len of defs 0..X exclusive
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STA MOVESRC ; Source offset for move
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@ -398,7 +392,8 @@ KEYCLSGAP PHA
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STA MOVELEN ; Length for move
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LDA MOVEDST ; Old dest ...
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STA MOVESRC ; ... is new source
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LDX FKEYNUM ; Key being defined
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* LDX FKEYNUM ; Key being defined
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LDX OSDECNUM
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INX
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JSR KEYSUMLENS ; Len of defs 0..X exclusive
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STA MOVEDST ; New dest
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@ -501,7 +496,8 @@ KEYREAD2 JSR KBDREAD ; Fetch character from KBD "buffer"
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BPL KEYREADOK ; Not top-bit key
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AND #$CF ; Drop Shift/Ctrl bits
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CMP #$C9
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BCC KEYSOFTY ; Not cursor key
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BCC KEYSOFTHI ; Not cursor key
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* BCC KEYSOFTY ; Not cursor key
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LDX FX4VAR
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BEQ KEYCURSOR ; *FX4,0 - editing keys
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CPY #$C9
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@ -518,7 +514,8 @@ KEYSOFTHI LDX FX254VAR
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CPX #$C0
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BCC KEYSOFTY
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TYA
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AND #$BF
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EOR #$40 ; Toggle keyboard map
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* AND #$BF
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TAY
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KEYSOFTY TYA ; Get key including Shift/Ctrl
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LSR A
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@ -564,7 +561,7 @@ KEYCURSOR CMP #$C9
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JSR GETCHRC ; Save char under cursor
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STA OLDCHAR
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KEYNONE SEC
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RTS
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KBDDONE2 RTS
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KEYCOPY BIT VDUSTATUS
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KEYCOPYTAB LDA FXTABCHAR ; Prepare TAB if no copy cursor
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@ -589,10 +586,10 @@ KEYCOPYTAB LDA FXTABCHAR ; Prepare TAB if no copy cursor
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* CC=keypress
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* A =keycode, X=corrupted
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* Apple+Letter -> Ctrl+Letter
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* AppleL+digit -> 80+x
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* AppleR+digit -> 90+x
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* AppleLR+digit -> A0+x
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* TAB -> $C9
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* AppleL+digit -> 80+x fkey -> 80+x
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* AppleR+digit -> 90+x Shift+fkey -> 90+x
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* AppleLR+digit -> A0+x Ctrl+fkey -> A0+x
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* TAB -> $C9 Shift+Ctrl+fkey -> B0+x
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* Cursors -> $CC-$CF
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* Keypad -> PADBASE+key
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*
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@ -600,8 +597,8 @@ KBDREAD CLV ; VC=return keypress
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KBDTEST LDA KBDDATA ; VS here to test for keypress
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EOR #$80 ; Toggle bit 7
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CMP #$80
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BCS KBDDONE ; No key pressed
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BVS KBDDONE ; VS=test for keypress
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BCS KBDDONE2 ; No key pressed
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BVS KBDDONE2 ; VS=test for keypress
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STA KBDACK ; Ack. keypress
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KBDREAD2 TAX ; X=raw keypress
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*
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@ -636,7 +633,13 @@ KBDREAD2B AND #$10
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BEQ KBDREAD5 ; Not keypad
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PLP ; Drop NoALT
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TXA ; A=raw keypress
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LDX FXKEYPADBASE
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BMI KBDREADPAD ; Translate keypad
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CMP #$60
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BCC KBDREADPAD
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LDA KBDADBKEYS-$60,X ; Translate $60-$7E keys
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BRA KBDREAD6
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KBDREADPAD LDX FXKEYPADBASE
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BEQ KBDCHKESC ; $00=use unchanged
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BPL KBDREAD4 ; Keypad not function keys
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CMP #$20
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@ -699,6 +702,10 @@ KBDCURSR CLC
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ADC #$C4 ; Cursor keys $C0+x
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BRA KBDFUNC
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KBDADBKEYS DB $85,$86,$87,$83,$88,$89,$80,$8B
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DB $80,$8D,$80,$8E,$80,$8A,$80,$8C
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DB $80,$8F,$C6,$C8,$CB,$C7,$84,$87
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DB $82,$CA,$81,$CC,$CD,$CE,$C4,$7F
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* Poll the keyboard to update Escape state
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* On exit, MI=Escape state pending
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