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added cx16 txt.scroll_up
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Irmen de Jong
parent
ba3dce0b4c
commit
2dbf849c82
@ -4,7 +4,6 @@
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;
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; indent format: TABS, size=8
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%target c64
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%import syslib
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%import conv
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@ -20,7 +19,7 @@ sub clear_screen() {
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clear_screenchars(' ')
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}
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asmsub fill_screen (ubyte char @ A, ubyte charcolor @ Y) clobbers(A) {
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asmsub fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A) {
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; ---- fill the character screen with the given fill character and character color.
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; (assumes screen and color matrix are at their default addresses)
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@ -50,7 +49,7 @@ _loop sta c64.Screen,y
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}}
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}
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asmsub clear_screencolors (ubyte scrcolor @ A) clobbers(Y) {
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asmsub clear_screencolors (ubyte color @ A) clobbers(Y) {
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; ---- clear the character screen colors with the given color (leaves characters).
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; (assumes color matrix is at the default address)
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%asm {{
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@ -77,7 +76,7 @@ sub uppercase() {
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c64.VMCSB &= ~2
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}
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asmsub scroll_left_full (ubyte alsocolors @ Pc) clobbers(A, Y) {
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asmsub scroll_left (ubyte alsocolors @ Pc) clobbers(A, Y) {
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; ---- scroll the whole screen 1 character to the left
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; contents of the rightmost column are unchanged, you should clear/refill this yourself
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; Carry flag determines if screen color data must be scrolled too
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@ -116,7 +115,7 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_right_full (ubyte alsocolors @ Pc) clobbers(A) {
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asmsub scroll_right (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character to the right
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; contents of the leftmost column are unchanged, you should clear/refill this yourself
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; Carry flag determines if screen color data must be scrolled too
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@ -150,7 +149,7 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_up_full (ubyte alsocolors @ Pc) clobbers(A) {
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asmsub scroll_up (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character up
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; contents of the bottom row are unchanged, you should refill/clear this yourself
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; Carry flag determines if screen color data must be scrolled too
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@ -184,7 +183,7 @@ _scroll_screen ; scroll the screen memory
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}}
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}
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asmsub scroll_down_full (ubyte alsocolors @ Pc) clobbers(A) {
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asmsub scroll_down (ubyte alsocolors @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character down
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; contents of the top row are unchanged, you should refill/clear this yourself
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; Carry flag determines if screen color data must be scrolled too
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@ -19,7 +19,7 @@ sub clear_screen() {
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clear_screenchars(' ')
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}
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asmsub fill_screen (ubyte char @ A, ubyte txtcolor @ Y) clobbers(A) {
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asmsub fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A) {
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; ---- fill the character screen with the given fill character and character color.
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%asm {{
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sty _ly+1
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@ -92,7 +92,7 @@ _lx ldx #0 ; modified
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}}
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}
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asmsub clear_screencolors (ubyte scrcolor @ A) clobbers(Y) {
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asmsub clear_screencolors (ubyte color @ A) clobbers(Y) {
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; ---- clear the character screen colors with the given color (leaves characters).
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; (assumes color matrix is at the default address)
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%asm {{
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@ -148,7 +148,116 @@ sub uppercase() {
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cx16.screen_set_charset(2, 0) ; uppercase charset
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}
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; TODO implement the "missing" txtio scroll subroutines: scroll_left_full, (also right, up, down)
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; TODO implement the "missing" txtio scroll subroutines: scroll_left, scroll_right, scroll_down
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asmsub scroll_left (ubyte dummy @ Pc) clobbers(A, Y) {
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; ---- scroll the whole screen 1 character to the left
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; contents of the rightmost column are unchanged, you should clear/refill this yourself
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; Carry flag is a dummy on the cx16
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}
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asmsub scroll_right (ubyte dummy @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character to the right
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; contents of the leftmost column are unchanged, you should clear/refill this yourself
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; Carry flag is a dummy on the cx16
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}
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asmsub scroll_up (ubyte dummy @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character up
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; contents of the bottom row are unchanged, you should refill/clear this yourself
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; Carry flag is a dummy on the cx16
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%asm {{
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phx
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jsr c64.SCREEN
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txa
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lsr a
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lsr a
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sta P8ZP_SCRATCH_REG ; number of columns / 4 due to loop unroll
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dey
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sty P8ZP_SCRATCH_B1 ; number of lines to scroll up
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lda #%00010000
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sta cx16.VERA_ADDR_H ; enable auto increment by 1, bank 0.
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lda #1
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sta cx16.VERA_ADDR_M ; start at (0, 1)
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_scrolline ldy #0
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stz cx16.VERA_ADDR_L
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ldx P8ZP_SCRATCH_REG
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- lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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lda cx16.VERA_DATA0
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sta _scrollbuffer,y
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iny
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dex
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bpl -
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; now copy the linebuffer back to the line above this one
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stz cx16.VERA_ADDR_L
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dec cx16.VERA_ADDR_M
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ldy #0
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ldx P8ZP_SCRATCH_REG
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- lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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lda _scrollbuffer,y
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sta cx16.VERA_DATA0
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iny
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dex
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bpl -
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inc cx16.VERA_ADDR_M
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inc cx16.VERA_ADDR_M ; next line to copy
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dec P8ZP_SCRATCH_B1
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bne _scrolline
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plx
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rts
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_scrollbuffer .fill 160, 0
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}}
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}
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asmsub scroll_down (ubyte dummy @ Pc) clobbers(A) {
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; ---- scroll the whole screen 1 character down
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; contents of the top row are unchanged, you should refill/clear this yourself
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; Carry flag is a dummy on the cx16
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}
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romsub $FFD2 = chrout(ubyte char @ A) ; for consistency. You can also use c64.CHROUT directly ofcourse.
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@ -44,7 +44,7 @@ main {
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}
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perform_scroll = false
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txt.scroll_left_full(true)
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txt.scroll_left(true)
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if c64.RASTER & 1
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c64.SPXY[1] ++
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else
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@ -8,21 +8,20 @@ main {
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sub start() {
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; 40 x 25
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; 80 x 60
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txt.fill_screen('*', 8)
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ubyte x
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ubyte y
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for y in 0 to txt.DEFAULT_HEIGHT-1 {
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for x in 0 to txt.DEFAULT_WIDTH-1 {
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txt.setchr(x,y,x+y)
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}
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}
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txt.clear_screen()
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repeat 60 {
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txt.scroll_up(true)
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txt.print_ub(txt.width())
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txt.chrout('\n')
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txt.print_ub(txt.height())
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txt.chrout('\n')
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ubyte i
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repeat {
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txt.clear_screencolors(i)
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i++
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repeat 5000 {
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x++
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}
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}
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}
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}
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