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real 65816 format

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This commit is contained in:
Peter Ferrie 2018-03-07 13:23:35 -08:00
parent 0f28ef8960
commit af7e3884b6
1 changed files with 19 additions and 10 deletions
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29
mouse_gs.s
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@ -13,6 +13,8 @@
; 2) extensions for WeeGUI ; 2) extensions for WeeGUI
;=============================== ;===============================
.setcpu "65816"
IoMouseStatus = $C027 IoMouseStatus = $C027
IoMouseData = $C024 IoMouseData = $C024
@ -36,18 +38,21 @@ GS_Mouse_OnlyY:
jsr WGUndrawPointer ; Erase the old mouse pointer jsr WGUndrawPointer ; Erase the old mouse pointer
ldy IoMouseData ;Read deltaY ldy IoMouseData ;Read deltaY
clc clc
.byte $FB ;xce ;65816 native mode xce ;65816 native mode
GS_Mouse_CheckX: GS_Mouse_CheckX:
.byte $C2, $30 ;rep #$30 ;16-bit A,X,Y rep #$30 ;16-bit A,X,Y
.byte $A2, <MousePixX, >MousePixX ;ldx #MousePixX .a16
.i16
ldx #MousePixX
jsr GS_Mouse_AddDelta ;Cvt to signed word, add to pixPos & range clamp jsr GS_Mouse_AddDelta ;Cvt to signed word, add to pixPos & range clamp
.byte $95, MouseTxtX-MousePixX ;sta MouseTxtX-MousePixX,x ;16-bit store overwrites Y sta MouseTxtX-MousePixX,x ;16-bit store overwrites Y
GS_Mouse_CheckY: GS_Mouse_CheckY:
tya ;a=DeltaY tya ;a=DeltaY
inx inx
inx ;x=MousePixY ptr inx ;x=MousePixY ptr
jsr GS_Mouse_AddDelta ;Cvt to signed word, add to pixPos & range clamp jsr GS_Mouse_AddDelta ;Cvt to signed word, add to pixPos & range clamp
.byte $E2, $21 ;sep #$21 ;8-bit acc, set carry sep #$21 ;8-bit acc, set carry
.a8
sta MouseTxtY-MousePixY,x sta MouseTxtY-MousePixY,x
tya tya
@ -59,22 +64,24 @@ GS_Mouse_CheckY:
ldy MouseTxtX-MousePixY,x ldy MouseTxtX-MousePixY,x
sty MouseDownX ;Set WG_MOUSECLICK_X & WG_MOUSECLICK_Y sty MouseDownX ;Set WG_MOUSECLICK_X & WG_MOUSECLICK_Y
GS_Mouse_NoDownEdge: GS_Mouse_NoDownEdge:
.byte $FB ;xce ;65816 emulation mode: 8-bit A,X,Y xce ;65816 emulation mode: 8-bit A,X,Y
jmp WGDrawPointer ; Redraw the pointer jmp WGDrawPointer ; Redraw the pointer
;------------------------------- ;-------------------------------
GS_Mouse_AddDelta: GS_Mouse_AddDelta:
.byte $09, $80, $FF ;ora #$ff80 ;Extend neg 6-bit delta in anticipation of delta .a16
.byte $89, $40, $00 ;bit #$0040 ;Check sign of delta .i16
ora #$ff80 ;Extend neg 6-bit delta in anticipation of delta
bit #$0040 ;Check sign of delta
bne GS_Mouse_GotDelta bne GS_Mouse_GotDelta
GS_Mouse_Pos: GS_Mouse_Pos:
.byte $29, $3F, $00 ;and #$003f ;Strip b7 button state from positive 6-bit delta and #$003f ;Strip b7 button state from positive 6-bit delta
GS_Mouse_GotDelta: GS_Mouse_GotDelta:
clc clc
adc 0,x ;Apply delta to X or Y pixel position adc 0,x ;Apply delta to X or Y pixel position
bpl GS_Mouse_NoMinClamp bpl GS_Mouse_NoMinClamp
.byte $7B ;tdc ;Clamp neg position to zero tdc ;Clamp neg position to zero
GS_Mouse_NoMinClamp: GS_Mouse_NoMinClamp:
cmp MouseMaxX-MousePixX,x cmp MouseMaxX-MousePixX,x
bcc GS_Mouse_NoMaxClamp bcc GS_Mouse_NoMaxClamp
@ -87,6 +94,8 @@ GS_Mouse_NoMaxClamp:
lsr lsr
GS_Mouse_Exit: GS_Mouse_Exit:
rts rts
.a8
.i8
GsDisableMouse: GsDisableMouse:
pla pla