mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 19:29:37 +00:00
074e10d288
When a program starts running, INIT is moved from one place to another place. Then, INIT's code is executed; and, the first place is re-used for variables. After the INIT code has finished, the second place can be re-used by the heap and the C stack. That means that initiation code and data won't waste any RAM space after they stop being needed.
216 lines
5.8 KiB
PHP
216 lines
5.8 KiB
PHP
;
|
|
; C64 generic definitions. Stolen from Elite128
|
|
;
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Zero page, Commodore stuff
|
|
|
|
VARTAB := $2D ; Pointer to start of BASIC variables
|
|
MEMSIZE := $37 ; Pointer to highest BASIC RAM location (+1)
|
|
TXTPTR := $7A ; Pointer into BASIC source code
|
|
TIME := $A0 ; 60 HZ clock
|
|
FNAM_LEN := $B7 ; Length of filename
|
|
SECADR := $B9 ; Secondary address
|
|
DEVNUM := $BA ; Device number
|
|
FNAM := $BB ; Pointer to filename
|
|
KEY_COUNT := $C6 ; Number of keys in input buffer
|
|
RVS := $C7 ; Reverse flag
|
|
CURS_FLAG := $CC ; 1 = cursor off
|
|
CURS_BLINK := $CD ; Blink counter
|
|
CURS_CHAR := $CE ; Character under the cursor
|
|
CURS_STATE := $CF ; Cursor blink state
|
|
SCREEN_PTR := $D1 ; Pointer to current char in text screen
|
|
CURS_X := $D3 ; Cursor column
|
|
CURS_Y := $D6 ; Cursor row
|
|
CRAM_PTR := $F3 ; Pointer to current char in color RAM
|
|
FREKZP := $FB ; Five unused bytes
|
|
|
|
BASIC_BUF := $200 ; Location of command-line
|
|
BASIC_BUF_LEN = 89 ; Maximum length of command-line
|
|
|
|
CHARCOLOR := $286
|
|
CURS_COLOR := $287 ; Color under the cursor
|
|
PALFLAG := $2A6 ; $01 = PAL, $00 = NTSC
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Kernal routines
|
|
|
|
; Direct entries
|
|
CLRSCR := $E544
|
|
KBDREAD := $E5B4
|
|
NMIEXIT := $FEBC
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Vector and other locations
|
|
|
|
IRQVec := $0314
|
|
BRKVec := $0316
|
|
NMIVec := $0318
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Screen size
|
|
|
|
XSIZE = 40
|
|
YSIZE = 25
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; I/O: VIC
|
|
|
|
VIC := $D000
|
|
VIC_SPR0_X := $D000
|
|
VIC_SPR0_Y := $D001
|
|
VIC_SPR1_X := $D002
|
|
VIC_SPR1_Y := $D003
|
|
VIC_SPR2_X := $D004
|
|
VIC_SPR2_Y := $D005
|
|
VIC_SPR3_X := $D006
|
|
VIC_SPR3_Y := $D007
|
|
VIC_SPR4_X := $D008
|
|
VIC_SPR4_Y := $D009
|
|
VIC_SPR5_X := $D00A
|
|
VIC_SPR5_Y := $D00B
|
|
VIC_SPR6_X := $D00C
|
|
VIC_SPR6_Y := $D00D
|
|
VIC_SPR7_X := $D00E
|
|
VIC_SPR7_Y := $D00F
|
|
VIC_SPR_HI_X := $D010
|
|
VIC_SPR_ENA := $D015
|
|
VIC_SPR_EXP_Y := $D017
|
|
VIC_SPR_EXP_X := $D01D
|
|
VIC_SPR_MCOLOR := $D01C
|
|
VIC_SPR_BG_PRIO := $D01B
|
|
|
|
VIC_SPR_MCOLOR0 := $D025
|
|
VIC_SPR_MCOLOR1 := $D026
|
|
|
|
VIC_SPR0_COLOR := $D027
|
|
VIC_SPR1_COLOR := $D028
|
|
VIC_SPR2_COLOR := $D029
|
|
VIC_SPR3_COLOR := $D02A
|
|
VIC_SPR4_COLOR := $D02B
|
|
VIC_SPR5_COLOR := $D02C
|
|
VIC_SPR6_COLOR := $D02D
|
|
VIC_SPR7_COLOR := $D02E
|
|
|
|
VIC_CTRL1 := $D011
|
|
VIC_CTRL2 := $D016
|
|
|
|
VIC_HLINE := $D012
|
|
|
|
VIC_LPEN_X := $D013
|
|
VIC_LPEN_Y := $D014
|
|
|
|
VIC_VIDEO_ADR := $D018
|
|
|
|
VIC_IRR := $D019 ; Interrupt request register
|
|
VIC_IMR := $D01A ; Interrupt mask register
|
|
|
|
VIC_BORDERCOLOR := $D020
|
|
VIC_BG_COLOR0 := $D021
|
|
VIC_BG_COLOR1 := $D022
|
|
VIC_BG_COLOR2 := $D023
|
|
VIC_BG_COLOR3 := $D024
|
|
|
|
; 128 stuff:
|
|
VIC_KBD_128 := $D02F ; Extended kbd bits (visible in 64 mode)
|
|
VIC_CLK_128 := $D030 ; Clock rate register (visible in 64 mode)
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; I/O: SID
|
|
|
|
SID := $D400
|
|
SID_S1Lo := $D400
|
|
SID_S1Hi := $D401
|
|
SID_PB1Lo := $D402
|
|
SID_PB1Hi := $D403
|
|
SID_Ctl1 := $D404
|
|
SID_AD1 := $D405
|
|
SID_SUR1 := $D406
|
|
|
|
SID_S2Lo := $D407
|
|
SID_S2Hi := $D408
|
|
SID_PB2Lo := $D409
|
|
SID_PB2Hi := $D40A
|
|
SID_Ctl2 := $D40B
|
|
SID_AD2 := $D40C
|
|
SID_SUR2 := $D40D
|
|
|
|
SID_S3Lo := $D40E
|
|
SID_S3Hi := $D40F
|
|
SID_PB3Lo := $D410
|
|
SID_PB3Hi := $D411
|
|
SID_Ctl3 := $D412
|
|
SID_AD3 := $D413
|
|
SID_SUR3 := $D414
|
|
|
|
SID_FltLo := $D415
|
|
SID_FltHi := $D416
|
|
SID_FltCtl := $D417
|
|
SID_Amp := $D418
|
|
SID_ADConv1 := $D419
|
|
SID_ADConv2 := $D41A
|
|
SID_Noise := $D41B
|
|
SID_Read3 := $D41C
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; I/O: VDC (128 only)
|
|
|
|
VDC_INDEX := $D600
|
|
VDC_DATA := $D601
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; I/O: CIAs
|
|
|
|
CIA1 := $DC00
|
|
CIA1_PRA := $DC00
|
|
CIA1_PRB := $DC01
|
|
CIA1_DDRA := $DC02
|
|
CIA1_DDRB := $DC03
|
|
CIA1_TOD10 := $DC08
|
|
CIA1_TODSEC := $DC09
|
|
CIA1_TODMIN := $DC0A
|
|
CIA1_TODHR := $DC0B
|
|
CIA1_ICR := $DC0D
|
|
CIA1_CRA := $DC0E
|
|
CIA1_CRB := $DC0F
|
|
|
|
CIA2 := $DD00
|
|
CIA2_PRA := $DD00
|
|
CIA2_PRB := $DD01
|
|
CIA2_DDRA := $DD02
|
|
CIA2_DDRB := $DD03
|
|
CIA2_TOD10 := $DD08
|
|
CIA2_TODSEC := $DD09
|
|
CIA2_TODMIN := $DD0A
|
|
CIA2_TODHR := $DD0B
|
|
CIA2_ICR := $DD0D
|
|
CIA2_CRA := $DD0E
|
|
CIA2_CRB := $DD0F
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Super CPU
|
|
|
|
SCPU_VIC_Bank1 := $D075
|
|
SCPU_Slow := $D07A
|
|
SCPU_Fast := $D07B
|
|
SCPU_EnableRegs := $D07E
|
|
SCPU_DisableRegs:= $D07F
|
|
SCPU_Detect := $D0BC
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Processor Port at $01
|
|
|
|
LORAM = $01 ; Enable the basic rom
|
|
HIRAM = $02 ; Enable the kernal rom
|
|
IOEN = $04 ; Enable I/O
|
|
CASSDATA = $08 ; Cassette data
|
|
CASSPLAY = $10 ; Cassette: Play
|
|
CASSMOT = $20 ; Cassette motor on
|
|
TP_FAST = $80 ; Switch Rossmoeller TurboProcess to fast mode
|
|
|
|
RAMONLY = $F8 ; (~(LORAM | HIRAM | IOEN)) & $FF
|