2000-05-28 13:40:48 +00:00
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2002-11-07 12:16:15 +00:00
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;-----------------------------------------------------------------------------
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; Zero page stuff
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2000-05-28 13:40:48 +00:00
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2004-03-11 21:54:22 +00:00
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WNDWDTH := $21 ; Right edge of text window
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CH := $24 ; Cursor horizontal position
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CV := $25 ; Cursor vertical position
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BASL := $28 ; Text base address
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INVFLG := $32 ; Normal/inverse(/flash)
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RNDL := $4E ; Random counter low
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RNDH := $4F ; Random counter high
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HIMEM := $73 ; Highest available memory address+1
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2002-11-07 12:16:15 +00:00
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|
|
;-----------------------------------------------------------------------------
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|
; Vectors
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|
2004-03-11 21:54:22 +00:00
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DOSWARM := $03D0 ; DOS warmstart vector
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BRKVec := $03F0 ; Break vector
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|
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MLI := $BF00 ; ProDOS Machine Language Interface
|
2002-11-07 12:16:15 +00:00
|
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|
|
|
|
|
|
;-----------------------------------------------------------------------------
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|
|
; Hardware
|
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|
|
|
|
2004-06-03 15:05:41 +00:00
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|
|
; Keyboard input
|
2004-03-11 21:54:22 +00:00
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|
KBD := $C000 ; Read keyboard
|
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|
|
|
KBDSTRB := $C010 ; Clear keyboard strobe
|
2002-11-07 12:16:15 +00:00
|
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|
|
|
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|
|
; 80 column card switches
|
2004-03-11 21:54:22 +00:00
|
|
|
CLRALTCHAR := $C00E ; Normal Apple II char set
|
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|
|
|
SETALTCHAR := $C00F ; Norm/inv LC, no flash
|
|
|
|
|
ALTCHARSET := $C01E ; >127 if alt charset switched in
|
|
|
|
|
RD80VID := $C01F ; >127 if 80 column video enabled
|
2000-05-28 13:40:48 +00:00
|
|
|
|
2004-03-11 21:54:22 +00:00
|
|
|
; Video soft switches
|
|
|
|
|
MIXCLR := $C052 ; Disable 4 lines of text
|
|
|
|
|
MIXSET := $C053 ; Enable 4 lines of text
|
|
|
|
|
LOWSCR := $C054 ; Page 1
|
|
|
|
|
HISCR := $C055 ; Page 2
|
2000-05-28 13:40:48 +00:00
|
|
|
|
|
|
|
|
; Game controller
|
2004-03-11 21:54:22 +00:00
|
|
|
BUTN0 := $C061 ; Open-Apple Key
|
|
|
|
|
BUTN1 := $C062 ; Closed-Apple Key
|
