cc65/asminc/c64.inc

;
; 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

KBDREPEAT       := $28a
KBDREPEATRATE   := $28b
KBDREPEATDELAY  := $28c

; ---------------------------------------------------------------------------
; 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: Complex Interface Adapters

CIA1            := $DC00
CIA1_PRA        := $DC00        ; Port A
CIA1_PRB        := $DC01        ; Port B
CIA1_DDRA       := $DC02        ; Data direction register for port A
CIA1_DDRB       := $DC03        ; Data direction register for port B
CIA1_TA         := $DC04        ; 16-bit timer A
CIA1_TB         := $DC06        ; 16-bit timer B
CIA1_TOD10      := $DC08        ; Time-of-day tenths of a second
CIA1_TODSEC     := $DC09        ; Time-of-day seconds
CIA1_TODMIN     := $DC0A        ; Time-of-day minutes
CIA1_TODHR      := $DC0B        ; Time-of-day hours
CIA1_SDR        := $DC0C        ; Serial data register
CIA1_ICR        := $DC0D        ; Interrupt control register
CIA1_CRA        := $DC0E        ; Control register for timer A
CIA1_CRB        := $DC0F        ; Control register for timer B

CIA2            := $DD00
CIA2_PRA        := $DD00
CIA2_PRB        := $DD01
CIA2_DDRA       := $DD02
CIA2_DDRB       := $DD03
CIA2_TA         := $DD04
CIA2_TB         := $DD06
CIA2_TOD10      := $DD08
CIA2_TODSEC     := $DD09
CIA2_TODMIN     := $DD0A
CIA2_TODHR      := $DD0B
CIA2_SDR        := $DD0C
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