mirror of
https://github.com/whscullin/apple2js.git
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89 lines
1.9 KiB
ArmAsm
89 lines
1.9 KiB
ArmAsm
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; Minimal mouse support. Only firmware routines are supported, no
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; I/O hooks or softswitches. This is enough to work with titles
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; that follow the documentation's recommendations to use the
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; firmware routines like Dazzle Draw and Apple II DeskTop
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;
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ORG $C700
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; Constants for future reference
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CLAMP_X_LOW EQU $478
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CLAMP_Y_LOW EQU $4F8
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CLAMP_X_HIGH EQU $578
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CLAMP_Y_HIGH EQU $5F8
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X_LOW EQU $478
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Y_LOW EQU $4F8
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X_HIGH EQU $578
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Y_HIGH EQU $5F8
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RESERVED1 EQU $678
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RESERVED2 EQU $67F
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STATUS EQU $778
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MODE EQU $7F8
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STATUS_DOWN EQU $80
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STATUS_LAST EQU $40
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INT_SCREEN EQU $08
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INT_BUTTON EQU $04
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INT_MOUSE EQU $02
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ROMRTS EQU $FF58
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DFB $00 ; $00
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DFB $00 ; $01
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DFB $00 ; $02
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DFB $00 ; $03
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DFB $00 ; $04
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; Cx05 - Pascal ID byte
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DFB $38 ; $05
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DFB $00 ; $06
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; Cx07 - Pascal ID byte
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DFB $18 ; $07
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DFB $00 ; $08
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DFB $00 ; $09
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DFB $00 ; $0A
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; Cx0B - Generic signature byte of firmware cards
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DFB $01 ; $0B
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; Cx0C - 2 = X-Y pointing device; 0 = identification code
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ID1 DFB $20 ; $0C
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DFB $00 ; $0D
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DFB $00 ; $0E
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DFB $00 ; $0F
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DFB $00 ; $10
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DFB $00 ; $11
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; The firmware routines point to individual RTS opcodes
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; that are intercepted by the card implementation which
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; manipulates memory and processor state directly
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DFB $20 ; $12 SETMOUSE
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DFB $21 ; $13 SERVEMOUSE
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DFB $22 ; $14 READMOUSE
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DFB $23 ; $15 CLEARMOUSE
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DFB $24 ; $16 POSMOUSE
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DFB $25 ; $17 CLAMPMOUSE
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DFB $26 ; $18 HOMEMOUSE
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DFB $27 ; $19 INITMOUSE
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DFB $00 ; $1A
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DFB $00 ; $1B
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DFB $00 ; $1C
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DFB $00 ; $1D
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DFB $00 ; $1E
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DFB $00 ; $1F
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RTS ; $20 SETMOUSE
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RTS ; $21 SERVEMOUSE
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RTS ; $22 READMOUSE
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RTS ; $23 CLEARMOUSE
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RTS ; $24 POSMOUSE
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RTS ; $25 CLAMPMOUSE
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RTS ; $26 HOMEMOUSE
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RTS ; $27 INITMOUSE
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PADDING DS $C7FB - PADDING
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ORG $C7FB
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; CxFB - A mouse identification byte
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ID2 DFB $D6 ; $FB
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DFB $00 ; $FC
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DFB $00 ; $FD
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DFB $00 ; $FE
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DFB $00 ; $FF
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END
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