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68 lines
1.8 KiB
PHP
68 lines
1.8 KiB
PHP
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; Vic20 generic definitions. Stolen mostly from c64.inc - Steve Schmidtke
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;
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; ---------------------------------------------------------------------------
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; Zero page, Commodore stuff
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ST = $90 ; IEC status byte
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TIME = $A0 ; 60HZ clock
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FNAM_LEN = $B7 ; Length of filename
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SECADR = $B9 ; Secondary address
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DEVNUM = $BA ; Device number
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KEY_COUNT = $C6 ; Number of keys in input buffer
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CURS_FLAG = $CC ; 1 = cursor off
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CURS_BLINK = $CD ; Blink counter
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CURS_CHAR = $CE ; Character under the cursor
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CURS_COLOR = $287 ; Color under the cursor
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CURS_STATE = $CF ; Cursor blink state
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SCREEN_PTR = $D1 ; Pointer to current char in text screen
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CURS_X = $D3 ; Cursor column
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CURS_Y = $D6 ; Cursor row
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CRAM_PTR = $F3 ; Pointer to current char in color RAM
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CHARCOLOR = $286
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PALFLAG = $2A6 ; $01 = PAL, $00 = NTSC
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; ---------------------------------------------------------------------------
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; Kernal routines
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; Direct entries
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CLRSCR = $E55F
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KBDREAD = $E5CF
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; ---------------------------------------------------------------------------
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; Vector and other locations
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IRQVec = $0314
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BRKVec = $0316
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NMIVec = $0318
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; ---------------------------------------------------------------------------
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; I/O: 6560 VIC
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VIC = $9000
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VIC_LINES = $9003 ; Screen lines, bit 7 is bit 0 from VIC_HLINE
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VIC_HLINE = $9004 ; Rasterline, bits 1-8
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VIC_COLOR = $900F ; Border and background color
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; ---------------------------------------------------------------------------
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; I/O: 6522 VIA1
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VIA1 = $9110
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VIA1_JOY = $9111
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VIA1_DDRB = $9112
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VIA1_DDRA = $9113
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; ---------------------------------------------------------------------------
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; I/O: 6522 VIA2
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VIA2 = $9120
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VIA2_JOY = $9120
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VIA2_DDRB = $9122
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VIA2_DDRA = $9123
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