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tweaks to c64 txtio
This commit is contained in:
Irmen de Jong
parent
f9ba09ac4d
commit
0f7454059c
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@ -209,6 +209,8 @@ _scroll_screen ; scroll the screen memory
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}}
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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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asmsub print (str text @ AY) clobbers(A,Y) {
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; ---- print null terminated string from A/Y
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; note: the compiler contains an optimization that will replace
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@ -432,21 +434,22 @@ asmsub input_chars (uword buffer @ AY) clobbers(A) -> ubyte @ Y {
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}}
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}
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asmsub setchr (ubyte col @Y, ubyte row @A) clobbers(A) {
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; ---- set the character in SCRATCH_ZPB1 on the screen matrix at the given position
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asmsub setchr (ubyte col @X, ubyte row @Y, ubyte character @A) clobbers(A, Y) {
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; ---- sets the character in the screen matrix at the given position
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%asm {{
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sty P8ZP_SCRATCH_REG
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pha
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tya
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asl a
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tay
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lda _screenrows+1,y
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sta _mod+2
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lda _screenrows,y
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txa
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clc
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adc P8ZP_SCRATCH_REG
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adc _screenrows,y
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sta _mod+1
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bcc +
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inc _mod+2
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+ lda P8ZP_SCRATCH_B1
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+ pla
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_mod sta $ffff ; modified
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rts
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@ -454,17 +457,18 @@ _screenrows .word $0400 + range(0, 1000, 40)
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}}
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}
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asmsub getchr (ubyte col @Y, ubyte row @A) clobbers(Y) -> ubyte @ A {
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asmsub getchr (ubyte col @A, ubyte row @Y) clobbers(Y) -> ubyte @ A {
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; ---- get the character in the screen matrix at the given location
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%asm {{
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sty P8ZP_SCRATCH_B1
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pha
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tya
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asl a
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tay
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lda setchr._screenrows+1,y
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sta _mod+2
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lda setchr._screenrows,y
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pla
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clc
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adc P8ZP_SCRATCH_B1
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adc setchr._screenrows,y
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sta _mod+1
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bcc _mod
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inc _mod+2
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@ -473,21 +477,22 @@ _mod lda $ffff ; modified
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}}
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}
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asmsub setclr (ubyte col @Y, ubyte row @A) clobbers(A) {
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; ---- set the color in SCRATCH_ZPB1 on the screen matrix at the given position
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asmsub setclr (ubyte col @X, ubyte row @Y, ubyte color @A) clobbers(A, Y) {
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; ---- set the color in A on the screen matrix at the given position
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%asm {{
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sty P8ZP_SCRATCH_REG
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pha
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tya
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asl a
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tay
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lda _colorrows+1,y
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sta _mod+2
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lda _colorrows,y
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txa
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clc
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adc P8ZP_SCRATCH_REG
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adc _colorrows,y
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sta _mod+1
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bcc +
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inc _mod+2
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+ lda P8ZP_SCRATCH_B1
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+ pla
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_mod sta $ffff ; modified
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rts
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@ -495,17 +500,18 @@ _colorrows .word $d800 + range(0, 1000, 40)
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}}
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}
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asmsub getclr (ubyte col @Y, ubyte row @A) clobbers(Y) -> ubyte @ A {
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asmsub getclr (ubyte col @A, ubyte row @Y) clobbers(Y) -> ubyte @ A {
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; ---- get the color in the screen color matrix at the given location
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%asm {{
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sty P8ZP_SCRATCH_B1
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pha
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tya
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asl a
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tay
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lda setclr._colorrows+1,y
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sta _mod+2
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lda setclr._colorrows,y
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pla
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clc
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adc P8ZP_SCRATCH_B1
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adc setclr._colorrows,y
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sta _mod+1
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bcc _mod
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inc _mod+2
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@ -259,6 +259,9 @@ asmsub init_system() {
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jsr c64.IOINIT
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jsr c64.RESTOR
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jsr c64.CINT
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lda #$9e ; yellow
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jsr c64.CHROUT
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; TODO select black background color
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lda #0
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tax
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tay
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@ -96,6 +96,8 @@ sub color2 (ubyte txtcol, ubyte bgcol) {
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c64.CHROUT(color_to_charcode[txtcol & 15])
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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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asmsub print (str text @ AY) clobbers(A,Y) {
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; ---- print null terminated string from A/Y
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; note: the compiler contains an optimization that will replace
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@ -298,7 +300,28 @@ asmsub print_w (word value @ AY) clobbers(A,Y) {
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}}
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}
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; TODO implement the "missing" txtio subroutines: input_chars, setchr, getchr, setclr, getclr, scroll_left_full, (also right, up, down)
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asmsub input_chars (uword buffer @ AY) clobbers(A) -> ubyte @ Y {
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; ---- Input a string (max. 80 chars) from the keyboard. Returns length in Y. (string is terminated with a 0 byte as well)
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; It assumes the keyboard is selected as I/O channel!
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%asm {{
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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ldy #0 ; char counter = 0
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- jsr c64.CHRIN
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cmp #$0d ; return (ascii 13) pressed?
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beq + ; yes, end.
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sta (P8ZP_SCRATCH_W1),y ; else store char in buffer
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iny
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bne -
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+ lda #0
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sta (P8ZP_SCRATCH_W1),y ; finish string with 0 byte
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rts
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}}
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}
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; TODO implement the "missing" txtio subroutines: getchr, setclr, getclr, scroll_left_full, (also right, up, down)
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sub setcc (ubyte column, ubyte row, ubyte char, ubyte charcolor) {
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; ---- set char+color at the given position on the screen
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@ -1,8 +1,10 @@
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%import c64lib
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%import c64graphics
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;%import c64lib
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;%import c64graphics
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%import c64textio
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%import c64flt
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;%import c64flt
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;%option enable_floats
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;%target cx16
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;%import cx16textio
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%zeropage basicsafe
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@ -10,64 +12,41 @@ main {
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sub start() {
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ubyte i1=0
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ubyte i2=1
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txt.setchr(5, 5, '*')
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txt.setchr(6, 5, '*')
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txt.setchr(7, 5, '*')
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txt.setchr(7, 6, '+')
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txt.setchr(7, 7, '+')
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byte b1 = 11
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byte b2 = 22
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word w1 = 1111
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word w2 = 2222
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float f1 = 1.111
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float f2 = 2.222
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txt.setclr(5, 5, 1)
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txt.setclr(6, 5, 2)
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txt.setclr(7, 5, 3)
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txt.setclr(7, 6, 4)
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txt.setclr(7, 7, 5)
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byte[] barr = [1,2]
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word[] warr = [1111,2222]
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float[] farr= [1.111, 2.222]
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txt.plot(15,10)
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txt.chrout('!')
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@($c000) = 11
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@($c001) = 22
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txt.print_ub(txt.getchr(4,5))
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txt.chrout(',')
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txt.print_ub(txt.getchr(5,5))
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txt.chrout(',')
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txt.print_ub(txt.getchr(6,5))
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txt.chrout(',')
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txt.print_ub(txt.getchr(7,5))
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txt.chrout(',')
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txt.print_ub(txt.getchr(8,5))
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txt.chrout('\n')
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txt.print_ub(txt.getclr(4,5))
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txt.chrout(',')
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txt.print_ub(txt.getclr(5,5))
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txt.chrout(',')
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txt.print_ub(txt.getclr(6,5))
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txt.chrout(',')
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txt.print_ub(txt.getclr(7,5))
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txt.chrout(',')
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txt.print_ub(txt.getclr(8,5))
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txt.chrout('\n')
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swap(b1,b2)
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swap(w1,w2)
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swap(f1,f2)
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swap(@($c000), @($c001))
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swap(barr[i1], barr[i2])
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swap(warr[i1], warr[i2])
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swap(farr[i1], farr[i2])
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txt.print_b(b1)
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c64.CHROUT(',')
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txt.print_b(b2)
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c64.CHROUT('\n')
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txt.print_w(w1)
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c64.CHROUT(',')
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txt.print_w(w2)
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c64.CHROUT('\n')
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c64flt.print_f(f1)
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c64.CHROUT(',')
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c64flt.print_f(f2)
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c64.CHROUT('\n')
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txt.print_b(barr[0])
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c64.CHROUT(',')
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txt.print_b(barr[1])
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c64.CHROUT('\n')
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txt.print_w(warr[0])
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c64.CHROUT(',')
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txt.print_w(warr[1])
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c64.CHROUT('\n')
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c64flt.print_f(farr[0])
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c64.CHROUT(',')
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c64flt.print_f(farr[1])
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c64.CHROUT('\n')
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txt.print_ub(@($c000))
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c64.CHROUT(',')
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txt.print_ub(@($c001))
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c64.CHROUT('\n')
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}
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}
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