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|
;
; Oric Atmos definitions
; BASIC 1.1 addresses
;
; ---------------------------------------------------------------------------
; Constants
SCREEN_XSIZE = 40 ; screen columns
SCREEN_YSIZE = 28 ; screen rows
FUNCTKEY = $A5
FNAME_LEN = 16 ; maximum length of file-name
; ---------------------------------------------------------------------------
; Zero page
SCRPTR := $12
BASIC_BUF := $35
CHARGOT := $E8
TXTPTR := $E9
; ---------------------------------------------------------------------------
; Low memory
MODEKEY := $0209
CAPSLOCK := $020C ; $7F = not locked, $FF = locked
PATTERN := $0213
IRQVec := $0245 ; "fast" interrupt vector
JOINFLAG := $025A ; 0 = don't joiu, $4A = join BASIC programs
VERIFYFLAG := $025B ; 0 = load, 1 = verify
CURS_Y := $0268
CURS_X := $0269
STATUS := $026A
BACKGRND := $026B
FOREGRND := $026C
TIMER3 := $0276
CFILE_NAME := $027F
CFOUND_NAME := $0293
FILESTART := $02A9
FILEEND := $02AB
AUTORUN := $02AD ; $00 = only load, $C7 = autorun
LANGFLAG := $02AE ; $00 = BASIC, $80 = machine code
LOADERR := $02B1
KEYBUF := $02DF
PARMERR := $02E0
PARAM1 := $02E1 ; & $02E2
PARAM2 := $02E3 ; & $02E4
PARAM3 := $02E5 ; & $02E6
BANGVEC := $02F5
; ---------------------------------------------------------------------------
; I/O locations
; 6522
.struct VIA ; Versatile Interface Adapter
.res $0300
PRB .byte ; Port Register B
PRA .byte ; Port Register A
DDRB .byte ; Data Direction Register B
DDRA .byte ; Data Direction Register A
T1 .word ; Timer 1
T1L .word ; Timer 1 Latch
T2 .word ; Timer 2
SR .byte ; Shift Register
ACR .byte ; Auxiliary Control Register
PCR .byte ; Peripheral Control Register
IFR .byte ; Interrupt Flags Register
IER .byte ; Interrupt Enable Register
PRA2 .byte ; Port Register A without handshaking
.endstruct
; 6551
.struct ACIA ; Asynchronous Communications Interface Adapter
.res $031C
DATA .byte
STATUS .byte
CMD .byte ; Command register
CTRL .byte ; Control register
.endstruct
SCREEN := $BB80
; ---------------------------------------------------------------------------
; ROM entries
GETLINE := $C592
TEXT := $EC21
HIRES := $EC33
CURSET := $F0C8
CURMOV := $F0FD
DRAW := $F110
CHAR := $F12D
POINT := $F1C8
PAPER := $F204
INK := $F210
PRINT := $F77C
; Sound Effects
PING := $FA9F
PING1 := $FA85
SHOOT := $FAB5
SHOOT1 := $FA9B
EXPLODE := $FACB
EXPLODE1 := $FAB1
ZAP := $FAE1
ZAP1 := $FAC7
TICK := $FB14
TICK1 := $FAFA
TOCK := $FB2A
TOCK1 := $FB10
|
