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cc65/libsrc/pet/pet.inc

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;
; C64 generic definitions. Stolen from Elite128
;
; ---------------------------------------------------------------------------
; Zero page, Commodore stuff
MEMSIZE = $34 ; Size of memory installed
ST = $96 ; IEC status byte
SECADR = $D3 ; Secondary address
DEVNUM = $D4 ; Device number
KEY_COUNT = $9E ; Number of keys in input buffer
CURS_FLAG = $A7 ; 1 = cursor off
CURS_BLINK = $A8 ; Blink counter
CURS_CHAR = $A9 ; Character under the cursor
CURS_STATE = $AA ; Cursor blink state
SCREEN_PTR = $C4 ; Pointer to current char in text screen
CURS_X = $C6 ; Cursor column
CURS_Y = $D8 ; Cursor row
SCR_LINELEN = $D5 ; Screen line length
KEY_BUF = $26F ; Keyboard buffer
; ---------------------------------------------------------------------------
; Vector and other locations
IRQVec = $0090
BRKVec = $0092
NMIVec = $0094