2019-09-27 07:38:51 +00:00
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;
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2020-10-17 14:36:11 +00:00
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; CX16 r38 definitions
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2019-09-27 07:38:51 +00:00
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;
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; ---------------------------------------------------------------------------
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; Constants
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.enum COLOR
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BLACK = $00
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WHITE
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RED
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CYAN
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VIOLET
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PURPLE = VIOLET
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GREEN
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BLUE
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YELLOW
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ORANGE
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BROWN
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2020-01-10 20:17:23 +00:00
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PINK
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LIGHTRED = PINK
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2019-09-27 07:38:51 +00:00
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GRAY1
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GRAY2
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LIGHTGREEN
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LIGHTBLUE
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GRAY3
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.endenum
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2020-01-10 20:17:23 +00:00
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; Special characters
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.enum CH
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COLOR_SWAP = $01
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STOP = $03
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UNDERLINE
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WHITE
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BOLD
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BELL
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BACKSPACE
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TAB
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LINEFEED
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ITALIC
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OUTLINE
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ENTER
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FONT_LOWER
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FONT_ISO
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F9
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CURS_DOWN
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REVERSE
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HOME
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DEL
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F10
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F11
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F12
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SHIFT_TAB
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RED = $1C
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CURS_RIGHT
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GREEN
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BLUE
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LIRA = $5C
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ORANGE = $81
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RUN = $83
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HELP
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F1
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F3
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F5
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F7
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F2
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F4
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F6
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F8
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SHIFT_ENTER
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FONT_UPPER
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FONT_PET
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BLACK
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CURS_UP
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ATTR_CLEAR
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SCRN_CLEAR
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INS
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BROWN
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PINK
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LIGHTRED = PINK
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GRAY1
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GRAY2
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LIGHTGREEN
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LIGHTBLUE
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GRAY3
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PURPLE
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VIOLET = PURPLE
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CURS_LEFT
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YELLOW
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CYAN
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SHIFT_SPACE
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LTEE = $AB
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LLCORNER = $AD
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URCORNER
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ULCORNER = $B0
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BTEE
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TTEE
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RTEE
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LRCORNER = $BD
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HLINE = $C0
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CROSS = $DB
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VLINE = $DD
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PI
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2019-09-27 07:38:51 +00:00
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.endenum
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; ---------------------------------------------------------------------------
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; Zero page
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2019-12-25 15:56:32 +00:00
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; GEOS and graphics pseudo-registers
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.struct gREG
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.org $02
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.union
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r0 .word
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.struct
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r0L .byte
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r0H .byte
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.endstruct
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.endunion
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.union
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r1 .word
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.struct
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r1L .byte
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r1H .byte
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.endstruct
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.endunion
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.union
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r2 .word
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.struct
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r2L .byte
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r2H .byte
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.endstruct
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.endunion
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.union
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r3 .word
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.struct
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r3L .byte
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r3H .byte
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.endstruct
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.endunion
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.union
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r4 .word
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.struct
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r4L .byte
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r4H .byte
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.endstruct
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.endunion
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.union
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r5 .word
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.struct
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r5L .byte
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r5H .byte
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.endstruct
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.endunion
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.union
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r6 .word
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.struct
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r6L .byte
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r6H .byte
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.endstruct
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.endunion
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.union
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r7 .word
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.struct
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r7L .byte
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r7H .byte
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.endstruct
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.endunion
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.union
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r8 .word
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.struct
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r8L .byte
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r8H .byte
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.endstruct
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.endunion
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.union
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r9 .word
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.struct
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r9L .byte
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r9H .byte
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.endstruct
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.endunion
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.union
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r10 .word
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.struct
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r10L .byte
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r10H .byte
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.endstruct
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.endunion
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.union
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r11 .word
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.struct
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r11L .byte
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r11H .byte
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.endstruct
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.endunion
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.union
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r12 .word
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.struct
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r12L .byte
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r12H .byte
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.endstruct
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.endunion
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.union
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r13 .word
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.struct
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r13L .byte
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r13H .byte
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.endstruct
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.endunion
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.union
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r14 .word
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.struct
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r14L .byte
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r14H .byte
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.endstruct
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.endunion
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.union
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r15 .word
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.struct
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r15L .byte
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r15H .byte
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.endstruct
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.endunion
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.endstruct
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2019-09-27 07:38:51 +00:00
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; Kernal
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2020-01-10 20:17:23 +00:00
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KTEMP2 := $80 ; 2 bytes for temporary storage
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IMPARM := $82 ; Pointer for PRIMM function
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FNAM := $8C ; Pointer to filename
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2019-11-16 18:11:40 +00:00
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; BASIC
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TXTPTR := $EE ; Pointer into BASIC source code
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2019-09-27 07:38:51 +00:00
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; Page two
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2019-11-16 18:11:40 +00:00
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BASIC_BUF := $0200 ; Location of command-line
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BASIC_BUF_LEN = 81 ; Maximum length of command-line
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2019-09-27 07:38:51 +00:00
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2020-05-02 17:46:06 +00:00
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SCREEN_MODE := $0261 ; Current screen mode (set by SCREEN_SET_MODE)
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SCREEN_PTR := $0262 ; Pointer to current row on text screen (16 bits)
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2020-01-10 20:17:23 +00:00
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STATUS := $0286 ; Status from previous I/O operation
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IN_DEV := $028A ; Current input device number
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OUT_DEV := $028B ; Current output device number
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FNAM_LEN := $028E ; Length of filename
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SECADR := $0290 ; Secondary address
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DEVNUM := $0291 ; Device number
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2019-12-25 15:56:32 +00:00
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CURS_COLOR := $0373 ; Color under the cursor
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2020-01-10 20:17:23 +00:00
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CHARCOLOR := $0376 ; Cursor's color nybbles (high: background, low: foreground)
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RVS := $0377 ; Reverse flag
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CURS_FLAG := $037B ; 1 = cursor off
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CURS_BLINK := $037C ; Blink counter
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CURS_CHAR := $037D ; Character under the cursor
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CURS_STATE := $037E ; Cursor blink state
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CURS_X := $0380 ; Cursor column
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CURS_Y := $0383 ; Cursor row
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LLEN := $0386 ; Line length
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NLINES := $0387 ; Number of screen lines
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2019-11-16 18:11:40 +00:00
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; BASIC
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2020-05-02 17:46:06 +00:00
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VARTAB := $03E2 ; Pointer to start of BASIC variables
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MEMSIZE := $03EA ; Pointer to highest BASIC RAM location (+1)
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2019-09-27 07:38:51 +00:00
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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 locations
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; Video Enhanced Retro Adapter
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2020-05-02 17:46:06 +00:00
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; Has audio and SPI.
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.scope VERA
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2019-09-27 07:38:51 +00:00
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; External registers
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2020-05-02 17:46:06 +00:00
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2019-09-27 07:38:51 +00:00
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.struct
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.org $9F20
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ADDR .faraddr ; Address for data port access
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DATA0 .byte ; First data port
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DATA1 .byte ; Second data port
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CTRL .byte ; Control register
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IRQ_EN .byte ; Interrupt enable bits
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IRQ_FLAGS .byte ; Interrupt flags
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2020-05-02 17:46:06 +00:00
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IRQ_RASTER .byte ; Line where IRQ will occur
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2019-09-27 07:38:51 +00:00
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.endstruct
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.enum ; Address automatic increment amounts
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2020-05-02 17:46:06 +00:00
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DEC0 = (($00 << 1) | $01) << 3
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DEC1 = (($01 << 1) | $01) << 3
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DEC2 = (($02 << 1) | $01) << 3
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DEC4 = (($03 << 1) | $01) << 3
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DEC8 = (($04 << 1) | $01) << 3
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DEC16 = (($05 << 1) | $01) << 3
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DEC32 = (($06 << 1) | $01) << 3
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DEC64 = (($07 << 1) | $01) << 3
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DEC128 = (($08 << 1) | $01) << 3
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DEC256 = (($09 << 1) | $01) << 3
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DEC512 = (($0A << 1) | $01) << 3
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DEC40 = (($0B << 1) | $01) << 3
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DEC80 = (($0C << 1) | $01) << 3
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DEC160 = (($0D << 1) | $01) << 3
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DEC320 = (($0E << 1) | $01) << 3
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DEC640 = (($0F << 1) | $01) << 3
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INC0 = (($00 << 1) | $00) << 3
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INC1 = (($01 << 1) | $00) << 3
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INC2 = (($02 << 1) | $00) << 3
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INC4 = (($03 << 1) | $00) << 3
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INC8 = (($04 << 1) | $00) << 3
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INC16 = (($05 << 1) | $00) << 3
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INC32 = (($06 << 1) | $00) << 3
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INC64 = (($07 << 1) | $00) << 3
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INC128 = (($08 << 1) | $00) << 3
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INC256 = (($09 << 1) | $00) << 3
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INC512 = (($0A << 1) | $00) << 3
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INC40 = (($0B << 1) | $00) << 3
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INC80 = (($0C << 1) | $00) << 3
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INC160 = (($0D << 1) | $00) << 3
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INC320 = (($0E << 1) | $00) << 3
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INC640 = (($0F << 1) | $00) << 3
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2019-09-27 07:38:51 +00:00
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.endenum
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2019-11-16 18:11:40 +00:00
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.enum ; Interrupt request flags
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VERT_SYNC = %00000001
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2020-05-02 17:46:06 +00:00
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RASTER_IRQ = %00000010
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2019-11-16 18:11:40 +00:00
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SPR_COLLIDED = %00000100
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2020-05-02 17:46:06 +00:00
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AUDIO_LOW = %00001000
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2019-11-16 18:11:40 +00:00
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.endenum
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2020-05-02 17:46:06 +00:00
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.scope DISP ; Display controller
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SELECT1 = %00000010
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.union
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.org $9F29
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2019-09-27 07:38:51 +00:00
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.struct
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2020-05-02 17:46:06 +00:00
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; These four registers are visible when the DCSEL flag = %0
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2019-09-27 07:38:51 +00:00
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VIDEO .byte
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HSCALE .byte
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VSCALE .byte
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FRAME .byte
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.endstruct
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2020-05-02 17:46:06 +00:00
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.struct
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; These four registers are visible when the DCSEL flag = %1
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HSTART .byte
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HSTOP .byte
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VSTART .byte
|
|
|
|
|
VSTOP .byte
|
|
|
|
|
.endstruct
|
|
|
|
|
.endunion
|
2019-09-27 07:38:51 +00:00
|
|
|
.enum MODE ; Output mode
|
2020-05-02 17:46:06 +00:00
|
|
|
DISABLE = $00
|
2019-09-27 07:38:51 +00:00
|
|
|
VGA
|
|
|
|
|
NTSC
|
|
|
|
|
RGB ; Interlaced, composite sync
|
|
|
|
|
.endenum
|
2020-05-02 17:46:06 +00:00
|
|
|
.enum DISABLE
|
|
|
|
|
COLOR = %00000100 ; NTSC monochrome
|
|
|
|
|
.endenum
|
|
|
|
|
.enum ENABLE
|
|
|
|
|
LAYER0 = %00010000
|
|
|
|
|
LAYER1 = %00100000
|
|
|
|
|
SPRITES = %01000000
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
|
|
|
|
.endscope
|
2020-05-02 17:46:06 +00:00
|
|
|
.struct L0 ; Display layer 0
|
|
|
|
|
.org $9F2D
|
|
|
|
|
CONFIG .byte
|
|
|
|
|
MAP_BASE .byte
|
|
|
|
|
TILE_BASE .byte
|
|
|
|
|
HSCROLL .word
|
|
|
|
|
VSCROLL .word
|
2019-09-27 07:38:51 +00:00
|
|
|
.endstruct
|
2020-05-02 17:46:06 +00:00
|
|
|
.struct L1 ; Display layer 1
|
|
|
|
|
.org $9F34
|
|
|
|
|
CONFIG .byte
|
|
|
|
|
MAP_BASE .byte
|
|
|
|
|
TILE_BASE .byte
|
2019-09-27 07:38:51 +00:00
|
|
|
HSCROLL .word
|
|
|
|
|
VSCROLL .word
|
|
|
|
|
.endstruct
|
2020-05-02 17:46:06 +00:00
|
|
|
.enum ; Layer display modes
|
|
|
|
|
TILE1BPP = %00000000 | $00
|
|
|
|
|
TILE2BPP
|
|
|
|
|
TILE4BPP
|
|
|
|
|
TILE8BPP
|
|
|
|
|
T256C = %00001000
|
|
|
|
|
BITMAP1BPP = %00000100 | $00
|
|
|
|
|
BITMAP2BPP
|
|
|
|
|
BITMAP4BPP
|
|
|
|
|
BITMAP8BPP
|
|
|
|
|
.endenum
|
2019-09-27 07:38:51 +00:00
|
|
|
.enum MAP ; Map geometry
|
2020-05-02 17:46:06 +00:00
|
|
|
WIDTH32 = $00 << 4
|
|
|
|
|
WIDTH64 = $01 << 4
|
|
|
|
|
WIDTH128 = $02 << 4
|
|
|
|
|
WIDTH256 = $03 << 4
|
|
|
|
|
HEIGHT32 = $00 << 6
|
|
|
|
|
HEIGHT64 = $01 << 6
|
|
|
|
|
HEIGHT128 = $02 << 6
|
|
|
|
|
HEIGHT256 = $03 << 6
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
2020-05-02 17:46:06 +00:00
|
|
|
.enum TILE ; Tile geometry
|
|
|
|
|
WIDTH8 = $00
|
|
|
|
|
WIDTH16 = $01
|
2019-09-27 07:38:51 +00:00
|
|
|
WIDTH320 = WIDTH8
|
|
|
|
|
WIDTH640 = WIDTH16
|
2020-05-02 17:46:06 +00:00
|
|
|
HEIGHT8 = $00 << 1
|
|
|
|
|
HEIGHT16 = $01 << 1
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
2020-05-02 17:46:06 +00:00
|
|
|
.scope PCM ; Pulse-Code Modulator
|
2019-09-27 07:38:51 +00:00
|
|
|
.struct
|
2020-05-02 17:46:06 +00:00
|
|
|
.org $9F3B
|
|
|
|
|
CTRL .byte
|
|
|
|
|
RATE .byte
|
|
|
|
|
DATA .byte
|
2019-12-25 15:56:32 +00:00
|
|
|
.endstruct
|
2020-05-02 17:46:06 +00:00
|
|
|
.enum
|
|
|
|
|
STEREO = %00010000
|
|
|
|
|
BITS16 = %00100000
|
|
|
|
|
RESET = %10000000
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
|
|
|
|
.endscope
|
|
|
|
|
.scope SPI
|
|
|
|
|
.struct
|
2020-05-02 17:46:06 +00:00
|
|
|
.org $9F3E
|
2019-09-27 07:38:51 +00:00
|
|
|
DATA .byte
|
2020-05-02 17:46:06 +00:00
|
|
|
CTRL .byte
|
2019-09-27 07:38:51 +00:00
|
|
|
.endstruct
|
|
|
|
|
.enum
|
2020-05-02 17:46:06 +00:00
|
|
|
SELECT = %00000001
|
|
|
|
|
SLOW = %00000010
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
|
|
|
|
.endscope
|
2020-05-02 17:46:06 +00:00
|
|
|
|
|
|
|
|
; Internal RAM and registers
|
|
|
|
|
|
|
|
|
|
.struct
|
|
|
|
|
.org $000000
|
|
|
|
|
VRAM .res $020000 ; 128 Kibibytes
|
|
|
|
|
.endstruct
|
|
|
|
|
.scope PSG ; Programmable Sound Generator
|
2019-09-27 07:38:51 +00:00
|
|
|
.struct
|
2020-05-02 17:46:06 +00:00
|
|
|
PITCH .word
|
2020-10-17 14:36:11 +00:00
|
|
|
VOL .byte ; Right, left sides; volume
|
2020-05-02 17:46:06 +00:00
|
|
|
WAVEFORM .byte ; Wave shape, pulse width
|
|
|
|
|
.endstruct
|
|
|
|
|
LEFT = %01 << 6
|
|
|
|
|
RIGHT = %10 << 6
|
|
|
|
|
.enum
|
|
|
|
|
PULSE = $00 << 6
|
|
|
|
|
SAWTOOTH = $01 << 6
|
|
|
|
|
TRIANGLE = $02 << 6
|
|
|
|
|
NOISE = $03 << 6
|
|
|
|
|
.endenum
|
|
|
|
|
.struct
|
|
|
|
|
.org $01F9C0
|
|
|
|
|
VOICES .res $10 * 4
|
2019-09-27 07:38:51 +00:00
|
|
|
.endstruct
|
2020-05-02 17:46:06 +00:00
|
|
|
.endscope
|
|
|
|
|
.struct
|
|
|
|
|
.org $01FA00
|
|
|
|
|
PALETTE .word $0100
|
|
|
|
|
.endstruct
|
|
|
|
|
.scope SPRITE
|
|
|
|
|
.struct ; Sprite attributes
|
|
|
|
|
ADDR .addr ; Address and color mode
|
|
|
|
|
XX .word ; Co-ordinates
|
|
|
|
|
YY .word
|
|
|
|
|
Z_FLIP .byte ; Collision mask, Z-depth, flip bits
|
|
|
|
|
SIZE_PAL .byte
|
|
|
|
|
.endstruct
|
|
|
|
|
.enum FLIP
|
|
|
|
|
NONE = %00000000
|
|
|
|
|
HORIZ
|
|
|
|
|
VERT
|
|
|
|
|
BOTH
|
|
|
|
|
.endenum
|
|
|
|
|
.enum DEPTH
|
|
|
|
|
DISABLE = $00 << 2
|
|
|
|
|
CANVAS = $01 << 2
|
|
|
|
|
LAYER0 = $02 << 2
|
|
|
|
|
LAYER1 = $03 << 2
|
|
|
|
|
.endenum
|
|
|
|
|
.enum ; Sprite geometry
|
|
|
|
|
WIDTH8 = $00 << 4
|
|
|
|
|
WIDTH16 = $01 << 4
|
|
|
|
|
WIDTH32 = $02 << 4
|
|
|
|
|
WIDTH64 = $03 << 4
|
|
|
|
|
HEIGHT8 = $00 << 6
|
|
|
|
|
HEIGHT16 = $01 << 6
|
|
|
|
|
HEIGHT32 = $02 << 6
|
|
|
|
|
HEIGHT64 = $03 << 6
|
|
|
|
|
COLORS16 = $00 << 7
|
|
|
|
|
COLORS256 = $01 << 7
|
2019-09-27 07:38:51 +00:00
|
|
|
.endenum
|
|
|
|
|
.endscope
|
2020-05-02 17:46:06 +00:00
|
|
|
.struct
|
|
|
|
|
.org $01FC00
|
|
|
|
|
SPRITES .res 128 * 8
|
|
|
|
|
.endstruct
|
2019-09-27 07:38:51 +00:00
|
|
|
.endscope
|
|
|
|
|
|
2019-11-16 18:11:40 +00:00
|
|
|
; 65C22
|
2019-09-27 07:38:51 +00:00
|
|
|
.struct VIA1 ; Versatile Interface Adapter
|
|
|
|
|
.org $9F60
|
|
|
|
|
PRB .byte ; ROM bank, IEC (Port Register B)
|
|
|
|
|
PRA .byte ; RAM bank (Port Register A)
|
|
|
|
|
DDRB .byte ; (Data Direction Register B)
|
|
|
|
|
DDRA .byte ; (Data Direction Register A)
|
|
|
|
|
T1 .word ; (Timer 1)
|
|
|
|
|
T1L .word ; (Timer 1 Latch)
|
|
|
|
|
T2 .word ; (Timer 2)
|
|
|
|
|
SR .byte ; (Shift Register)
|
|
|
|
|
ACR .byte ; (Auxiliary Control Register)
|
|
|
|
|
PCR .byte ; (Peripheral Control Register)
|
|
|
|
|
IFR .byte ; (Interrupt Flags Register)
|
|
|
|
|
IER .byte ; (Interrupt Enable Register)
|
|
|
|
|
PRA2 .byte ; RAM bank (Port Register A without handshaking)
|
|
|
|
|
.endstruct
|
|
|
|
|
|
2019-11-16 18:11:40 +00:00
|
|
|
; 65C22
|
2019-09-27 07:38:51 +00:00
|
|
|
.struct VIA2
|
|
|
|
|
.org $9F70
|
2019-11-16 18:11:40 +00:00
|
|
|
PRB .byte ; Mouse communication ?
|
2019-10-15 16:10:34 +00:00
|
|
|
PRA .byte ; NES controller communication
|
2019-09-27 07:38:51 +00:00
|
|
|
DDRB .byte
|
|
|
|
|
DDRA .byte
|
|
|
|
|
T1 .word
|
|
|
|
|
T1L .word
|
|
|
|
|
T2 .word
|
|
|
|
|
SR .byte
|
|
|
|
|
ACR .byte
|
|
|
|
|
PCR .byte
|
|
|
|
|
IFR .byte
|
|
|
|
|
IER .byte
|
|
|
|
|
PRA2 .byte
|
|
|
|
|
.endstruct
|
|
|
|
|
|
|
|
|
|
; Real-Time Clock
|
|
|
|
|
|
|
|
|
|
; X16 Emulator device
|
|
|
|
|
; This device doesn't exist on the real machine.
|
|
|
|
|
.struct EMULATOR
|
|
|
|
|
.org $9FB0
|
|
|
|
|
DEBUG .byte ; Boolean: debugging enabled
|
2019-10-15 16:10:34 +00:00
|
|
|
VERALOG .byte ; Boolean: log VERA activity
|
2019-09-27 07:38:51 +00:00
|
|
|
KEYBOARDLOG .byte ; Boolean: log keyboard data
|
2019-10-15 16:10:34 +00:00
|
|
|
ECHO .byte ; Type of echo that's enabled
|
2020-10-17 14:36:11 +00:00
|
|
|
SAVEXIT .byte ; Boolean: save machine state on exit
|
2019-10-15 16:10:34 +00:00
|
|
|
GIFREC .byte ; Method of recording GIF movie
|
2020-10-17 14:36:11 +00:00
|
|
|
.res 2
|
|
|
|
|
CYCLECOUNT .dword ; Running count of CPU cycles (Read-Only)
|
|
|
|
|
.res 1
|
2019-10-15 16:10:34 +00:00
|
|
|
KEYMAP .byte ; Current keyboard layout number (Read-Only)
|
|
|
|
|
DETECT .byte 2 ; If is "16" string, then running on emulator (RO)
|
2019-09-27 07:38:51 +00:00
|
|
|
.endstruct
|
2019-12-25 15:56:32 +00:00
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
|
|
|
; Banked RAM and ROM
|
|
|
|
|
|
2020-05-02 17:46:06 +00:00
|
|
|
KEY_COUNT := $A00A ; (bank 0) Number of keys in input buffer
|
|
|
|
|
TIMER := $A037 ; (bank 0) 60 Hz. timer (3 bytes, big-endian)
|
2019-12-25 15:56:32 +00:00
|
|
|
|
|
|
|
|
.struct BANK
|
|
|
|
|
.org $A000
|
|
|
|
|
RAM .res $2000 ; 8 Kibibyte window into 512 Kibibytes or 2048 Kibibytes
|
|
|
|
|
ROM .res $4000 ; 16 Kibibyte window into 128 Kibibytes
|
|
|
|
|
.endstruct
|
