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cc65/libsrc/vic20/vic20.inc
cuz 37178d5141 Make screensize() fetch the values dynamically instead of using variables
that are set on startup. This is needed to support the C128, which can switch
the screen size at runtime.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2042 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-04-09 19:34:57 +00:00

75 lines
1.9 KiB
PHP

;
; Vic20 generic definitions. Stolen mostly from c64.inc - Steve Schmidtke
;
; ---------------------------------------------------------------------------
; Zero page, Commodore stuff
ST = $90 ; IEC status byte
TIME = $A0 ; 60HZ clock
FNAM_LEN = $B7 ; Length of filename
SECADR = $B9 ; Secondary address
DEVNUM = $BA ; Device number
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
CHARCOLOR = $286
CURS_COLOR = $287 ; Color under the cursor
PALFLAG = $2A6 ; $01 = PAL, $00 = NTSC
; ---------------------------------------------------------------------------
; Screen size
XSIZE = 22
YSIZE = 23
; ---------------------------------------------------------------------------
; Kernal routines
; Direct entries
CLRSCR = $E55F
KBDREAD = $E5CF
; ---------------------------------------------------------------------------
; Vector and other locations
IRQVec = $0314
BRKVec = $0316
NMIVec = $0318
; ---------------------------------------------------------------------------
; I/O: 6560 VIC
VIC = $9000
VIC_LINES = $9003 ; Screen lines, bit 7 is bit 0 from VIC_HLINE
VIC_HLINE = $9004 ; Rasterline, bits 1-8
VIC_COLOR = $900F ; Border and background color
; ---------------------------------------------------------------------------
; I/O: 6522 VIA1
VIA1 = $9110
VIA1_JOY = $9111
VIA1_DDRB = $9112
VIA1_DDRA = $9113
; ---------------------------------------------------------------------------
; I/O: 6522 VIA2
VIA2 = $9120
VIA2_JOY = $9120
VIA2_DDRB = $9122
VIA2_DDRA = $9123