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div/mul by 16 helpers
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Joshua Bell
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471719dace
@ -552,16 +552,16 @@ Current file: stf.s
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000988 1 .endproc
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000988 1
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000988 1 .proc update_scroll_params ; called to update scroll bar position
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000988 1 00 type: .byte 0 ; 1 = vertical, 2 = horizontal ?
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000989 1 00 pos: .byte 0 ; new position (0...250)
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000988 1 00 type: .byte 0 ; 1 = vscroll, 2 = hscroll
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000989 1 00 pos: .byte 0 ; new position
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00098A 1 .endproc
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00098A 1
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00098A 1 ;;; Used when dragging vscroll thumb
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00098A 1 .proc thumb_drag_params
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00098A 1 00 type: .byte 0 ; vscroll = 1, hscroll = 2 ??
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00098A 1 00 type: .byte 0 ; 1 = vscroll, 2 = hscroll
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00098B 1 00 00 xcoord: .word 0
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00098D 1 00 00 ycoord: .word 0
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00098F 1 00 pos: .byte 0 ; position (0...255)
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00098F 1 00 pos: .byte 0 ; position
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000990 1 00 moved: .byte 0 ; 0 if not moved, 1 if moved
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000991 1 .endproc
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000991 1
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@ -907,7 +907,7 @@ Current file: stf.s
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000B96 1 A9 02 lda #>max_width
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000B98 1 ED 62 09 sbc window_width+1
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000B9B 1 85 07 sta $07
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000B9D 1 20 DF 10 jsr L10DF
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000B9D 1 20 DF 10 jsr div_by_16
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000BA0 1 8D 87 09 sta resize_window_params::L0987
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000BA3 1 A9 02 lda #$02
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000BA5 1 8D 86 09 sta resize_window_params::L0986
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@ -1082,7 +1082,7 @@ Current file: stf.s
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000CB8 1 AD 90 09 lda thumb_drag_params::moved
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000CBB 1 F0 29 beq end
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000CBD 1 AD 8F 09 lda thumb_drag_params::pos
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000CC0 1 20 EC 10 jsr L10EC
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000CC0 1 20 EC 10 jsr mul_by_16
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000CC3 1 A5 06 lda $06
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000CC5 1 8D B0 09 sta text_box::hoffset
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000CC8 1 A5 07 lda $07
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@ -1179,7 +1179,7 @@ Current file: stf.s
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000D5E 1 ;;; only used from hscroll code?
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000D5E 1 .proc L0D5E
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000D5E 1 AD 9B 09 lda window_params::hscroll_pos
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000D61 1 20 EC 10 jsr L10EC
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000D61 1 20 EC 10 jsr mul_by_16
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000D64 1 18 clc
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000D65 1 A5 06 lda $06
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000D67 1 8D B0 09 sta text_box::hoffset
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@ -1241,7 +1241,7 @@ Current file: stf.s
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000DD9 1 85 06 sta $06
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000DDB 1 AD B1 09 lda text_box::hoffset+1
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000DDE 1 85 07 sta $07
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000DE0 1 20 DF 10 jsr L10DF
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000DE0 1 20 DF 10 jsr div_by_16
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000DE3 1 8D 89 09 sta update_scroll_params::pos
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000DE6 1 20 00 40 4B A2D_CALL A2D_UPDATE_SCROLL, update_scroll_params
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000DEA 1 88 09
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@ -1603,8 +1603,8 @@ Current file: stf.s
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0010DE 1 60 end: rts
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0010DF 1 .endproc
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0010DF 1
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0010DF 1 .proc L10DF ; ???
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0010DF 1 A2 04 ldx #$04
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0010DF 1 .proc div_by_16 ; input in $06/$07, output in a
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0010DF 1 A2 04 ldx #4
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0010E1 1 18 loop: clc
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0010E2 1 66 07 ror $07
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0010E4 1 66 06 ror $06
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@ -1614,11 +1614,11 @@ Current file: stf.s
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0010EB 1 60 rts
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0010EC 1 .endproc
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0010EC 1
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0010EC 1 .proc L10EC ; ???
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0010EC 1 .proc mul_by_16 ; input in a, output in $06/$07
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0010EC 1 85 06 sta $06
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0010EE 1 A9 00 lda #$00
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0010EE 1 A9 00 lda #0
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0010F0 1 85 07 sta $07
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0010F2 1 A2 04 ldx #$04
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0010F2 1 A2 04 ldx #4
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0010F4 1 18 loop: clc
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0010F5 1 26 06 rol $06
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0010F7 1 26 07 rol $07
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Binary file not shown.
@ -280,16 +280,16 @@ L0987: .byte 0
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.endproc
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.proc update_scroll_params ; called to update scroll bar position
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type: .byte 0 ; 1 = vertical, 2 = horizontal ?
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pos: .byte 0 ; new position (0...250)
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type: .byte 0 ; 1 = vscroll, 2 = hscroll
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pos: .byte 0 ; new position
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.endproc
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;;; Used when dragging vscroll thumb
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.proc thumb_drag_params
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type: .byte 0 ; vscroll = 1, hscroll = 2 ??
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type: .byte 0 ; 1 = vscroll, 2 = hscroll
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xcoord: .word 0
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ycoord: .word 0
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pos: .byte 0 ; position (0...255)
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pos: .byte 0 ; position
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moved: .byte 0 ; 0 if not moved, 1 if moved
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.endproc
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@ -623,7 +623,7 @@ L0B8B: sta window_params::hscroll
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lda #>max_width
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sbc window_width+1
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sta $07
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jsr L10DF
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jsr div_by_16
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sta resize_window_params::L0987
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lda #$02
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sta resize_window_params::L0986
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@ -796,7 +796,7 @@ loop: inx
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lda thumb_drag_params::moved
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beq end
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lda thumb_drag_params::pos
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jsr L10EC
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jsr mul_by_16
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lda $06
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sta text_box::hoffset
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lda $07
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@ -891,7 +891,7 @@ store: sta window_params::hscroll_pos
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;;; only used from hscroll code?
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.proc L0D5E
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lda window_params::hscroll_pos
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jsr L10EC
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jsr mul_by_16
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clc
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lda $06
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sta text_box::hoffset
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@ -953,7 +953,7 @@ end: rts
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sta $06
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lda text_box::hoffset+1
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sta $07
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jsr L10DF
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jsr div_by_16
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sta update_scroll_params::pos
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A2D_CALL A2D_UPDATE_SCROLL, update_scroll_params
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rts
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@ -1307,8 +1307,8 @@ loop: lda L0966
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end: rts
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.endproc
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.proc L10DF ; ???
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ldx #$04
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.proc div_by_16 ; input in $06/$07, output in a
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ldx #4
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loop: clc
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ror $07
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ror $06
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@ -1318,11 +1318,11 @@ loop: clc
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rts
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.endproc
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.proc L10EC ; ???
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.proc mul_by_16 ; input in a, output in $06/$07
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sta $06
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lda #$00
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lda #0
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sta $07
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ldx #$04
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ldx #4
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loop: clc
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rol $06
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rol $07
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