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https://github.com/ksherlock/itty-bitty-vtty.git
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command keys:
* command 1 - command 4 equivalent to PF1 - PF4 * command-delete = backspace (0x7f) * command-return = linefeed (0x0a)
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vt100.key.S
43
vt100.key.S
@ -38,7 +38,7 @@ keypress ent
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sta mod
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sta KEYSTROBE
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bit #kmOption!kmCommand
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bne :command
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bne command
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bit #kmKeypad
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bne keypad
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@ -68,8 +68,45 @@ keypress ent
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lda #$08
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:send jmp dispatch
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:command ; or option
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rts
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command ; or option
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* apple-return -> linefeed
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* apple-backspace -> delete
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lda key
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cmp #$7f
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beq :bs
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cmp #$0d
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beq :lf
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cmp #:MIN
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blt :rts
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cmp #:MAX+1
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bcs :rts
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sec
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sbc #:MIN
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asl
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tax
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jmp (:table,x)
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:rts rts
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:MIN equ 49
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:MAX equ 52
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:bs jmp dispatch ;
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:lf lda #$0a
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jmp dispatch
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:table
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dw pf1 ; 1
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dw pf2 ; 2
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dw pf3 ; 3
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dw pf4 ; 4
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keypad
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