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prog8/compiler/res/prog8lib/cx16/textio.p8
Irmen de Jong a735939d1e removed confusing GPL software license reference and copyright header from library files. (because of exclusion in output files) 
Reworded software license and exclusion clause somewhat again in attempt to make it even clearer.
2022-05-30 20:12:20 +02:00

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; Prog8 definitions for the Text I/O and Screen routines for the CommanderX16
%import syslib
%import conv
txt {
const ubyte DEFAULT_WIDTH = 80
const ubyte DEFAULT_HEIGHT = 60
const ubyte VERA_TEXTMATRIX_BANK = 1
const uword VERA_TEXTMATRIX_ADDR = $b000
sub clear_screen() {
txt.chrout(147)
}
sub home() {
txt.chrout(19)
}
sub nl() {
txt.chrout('\n')
}
sub spc() {
txt.chrout(' ')
}
asmsub column(ubyte col @A) clobbers(A, X, Y) {
; ---- set the cursor on the given column (starting with 0) on the current line
%asm {{
sec
jsr c64.PLOT
tay
clc
jmp c64.PLOT
}}
}
asmsub fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A) {
; ---- fill the character screen with the given fill character and character color.
%asm {{
sty _ly+1
phx
pha
jsr c64.SCREEN ; get dimensions in X/Y
txa
lsr a
lsr a
sta _lx+1
lda #%00010000
jsr set_vera_textmatrix_addresses
pla
_lx ldx #0 ; modified
phy
_ly ldy #1 ; modified
- sta cx16.VERA_DATA0
sty cx16.VERA_DATA0
sta cx16.VERA_DATA0
sty cx16.VERA_DATA0
sta cx16.VERA_DATA0
sty cx16.VERA_DATA0
sta cx16.VERA_DATA0
sty cx16.VERA_DATA0
dex
bne -
ply
dey
beq +
stz cx16.VERA_ADDR_L
inc cx16.VERA_ADDR_M ; next line
bra _lx
+ plx
rts
set_vera_textmatrix_addresses:
stz cx16.VERA_CTRL
ora #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
stz cx16.VERA_ADDR_L ; start at (0,0)
lda #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
rts
}}
}
asmsub clear_screenchars (ubyte char @ A) clobbers(Y) {
; ---- clear the character screen with the given fill character (leaves colors)
; (assumes screen matrix is at the default address)
%asm {{
phx
pha
jsr c64.SCREEN ; get dimensions in X/Y
txa
lsr a
lsr a
sta _lx+1
lda #%00100000
jsr fill_screen.set_vera_textmatrix_addresses
pla
_lx ldx #0 ; modified
- sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
dex
bne -
dey
beq +
stz cx16.VERA_ADDR_L
inc cx16.VERA_ADDR_M ; next line
bra _lx
+ plx
rts
}}
}
asmsub clear_screencolors (ubyte color @ A) clobbers(Y) {
; ---- clear the character screen colors with the given color (leaves characters).
; (assumes color matrix is at the default address)
%asm {{
phx
sta _la+1
jsr c64.SCREEN ; get dimensions in X/Y
txa
lsr a
lsr a
sta _lx+1
stz cx16.VERA_CTRL
lda #%00100000
jsr fill_screen.set_vera_textmatrix_addresses
inc cx16.VERA_ADDR_L ; start at (1,0) - the color attribute byte
_lx ldx #0 ; modified
_la lda #0 ; modified
- sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
sta cx16.VERA_DATA0
dex
bne -
dey
beq +
lda #1
sta cx16.VERA_ADDR_L
inc cx16.VERA_ADDR_M ; next line
bra _lx
+ plx
rts
}}
}
ubyte[16] color_to_charcode = [$90,$05,$1c,$9f,$9c,$1e,$1f,$9e,$81,$95,$96,$97,$98,$99,$9a,$9b]
sub color (ubyte txtcol) {
txtcol &= 15
c64.CHROUT(color_to_charcode[txtcol])
}
sub color2 (ubyte txtcol, ubyte bgcol) {
txtcol &= 15
bgcol &= 15
c64.CHROUT(color_to_charcode[bgcol])
c64.CHROUT(1) ; switch fg and bg colors
c64.CHROUT(color_to_charcode[txtcol])
}
sub lowercase() {
c64.CHROUT($0e)
; this is not 100% compatible: cx16.screen_set_charset(3, 0) ; lowercase petscii charset
}
sub uppercase() {
c64.CHROUT($8e)
; this is not 100% compatible: cx16.screen_set_charset(2, 0) ; uppercase petscii charset
}
sub iso() {
c64.CHROUT($0f)
; This doesn't enable it completely: cx16.screen_set_charset(1, 0) ; iso charset
}
sub iso_off() {
; -- you have to call this first when switching back from iso charset to regular charset.
c64.CHROUT($8f)
}
asmsub scroll_left() clobbers(A, Y) {
; ---- scroll the whole screen 1 character to the left
; contents of the rightmost column are unchanged, you should clear/refill this yourself
%asm {{
phx
jsr c64.SCREEN
dex
stx _lx+1
dey
sty P8ZP_SCRATCH_B1 ; number of rows to scroll
_nextline
stz cx16.VERA_CTRL ; data port 0: source column
lda #%00010000 | VERA_TEXTMATRIX_BANK ; auto increment 1
sta cx16.VERA_ADDR_H
lda #2
sta cx16.VERA_ADDR_L ; begin in column 1
lda P8ZP_SCRATCH_B1
clc
adc #>VERA_TEXTMATRIX_ADDR
tay
sty cx16.VERA_ADDR_M
lda #1
sta cx16.VERA_CTRL ; data port 1: destination column
lda #%00010000 | VERA_TEXTMATRIX_BANK ; auto increment 1
sta cx16.VERA_ADDR_H
stz cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
_lx ldx #0 ; modified
- lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy char
lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy color
dex
bne -
dec P8ZP_SCRATCH_B1
bpl _nextline
lda #0
sta cx16.VERA_CTRL
plx
rts
}}
}
asmsub scroll_right() clobbers(A) {
; ---- scroll the whole screen 1 character to the right
; contents of the leftmost column are unchanged, you should clear/refill this yourself
%asm {{
phx
jsr c64.SCREEN
dex
stx _lx+1
txa
asl a
dea
sta _rcol+1
ina
ina
sta _rcol2+1
dey
sty P8ZP_SCRATCH_B1 ; number of rows to scroll
_nextline
stz cx16.VERA_CTRL ; data port 0: source column
lda #%00011000 | VERA_TEXTMATRIX_BANK ; auto decrement 1
sta cx16.VERA_ADDR_H
_rcol lda #79*2-1 ; modified
sta cx16.VERA_ADDR_L ; begin in rightmost column minus one
lda P8ZP_SCRATCH_B1
clc
adc #>VERA_TEXTMATRIX_ADDR
tay
sty cx16.VERA_ADDR_M
lda #1
sta cx16.VERA_CTRL ; data port 1: destination column
lda #%00011000 | VERA_TEXTMATRIX_BANK ; auto decrement 1
sta cx16.VERA_ADDR_H
_rcol2 lda #79*2+1 ; modified
sta cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
_lx ldx #0 ; modified
- lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy char
lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy color
dex
bne -
dec P8ZP_SCRATCH_B1
bpl _nextline
lda #0
sta cx16.VERA_CTRL
plx
rts
}}
}
asmsub scroll_up() clobbers(A, Y) {
; ---- scroll the whole screen 1 character up
; contents of the bottom row are unchanged, you should refill/clear this yourself
%asm {{
phx
jsr c64.SCREEN
stx _nextline+1
dey
sty P8ZP_SCRATCH_B1
stz cx16.VERA_CTRL ; data port 0 is source
lda #1 | (>VERA_TEXTMATRIX_ADDR)
sta cx16.VERA_ADDR_M ; start at second line
stz cx16.VERA_ADDR_L
lda #%00010000 | VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H ; enable auto increment by 1, bank 0.
lda #1
sta cx16.VERA_CTRL ; data port 1 is destination
lda #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M ; start at top line
stz cx16.VERA_ADDR_L
lda #%00010000 | VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H ; enable auto increment by 1, bank 0.
_nextline
ldx #80 ; modified
- lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy char
lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy color
dex
bne -
dec P8ZP_SCRATCH_B1
beq +
stz cx16.VERA_CTRL ; data port 0
stz cx16.VERA_ADDR_L
inc cx16.VERA_ADDR_M
lda #1
sta cx16.VERA_CTRL ; data port 1
stz cx16.VERA_ADDR_L
inc cx16.VERA_ADDR_M
bra _nextline
+ lda #0
sta cx16.VERA_CTRL
plx
rts
}}
}
asmsub scroll_down() clobbers(A, Y) {
; ---- scroll the whole screen 1 character down
; contents of the top row are unchanged, you should refill/clear this yourself
%asm {{
phx
jsr c64.SCREEN
stx _nextline+1
dey
sty P8ZP_SCRATCH_B1
stz cx16.VERA_CTRL ; data port 0 is source
dey
tya
clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M ; start at line before bottom line
stz cx16.VERA_ADDR_L
lda #%00010000 | VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H ; enable auto increment by 1, bank 0.
lda #1
sta cx16.VERA_CTRL ; data port 1 is destination
iny
tya
clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M ; start at bottom line
stz cx16.VERA_ADDR_L
lda #%00010000 | VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H ; enable auto increment by 1, bank 0.
_nextline
ldx #80 ; modified
- lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy char
lda cx16.VERA_DATA0
sta cx16.VERA_DATA1 ; copy color
dex
bne -
dec P8ZP_SCRATCH_B1
beq +
stz cx16.VERA_CTRL ; data port 0
stz cx16.VERA_ADDR_L
dec cx16.VERA_ADDR_M
lda #1
sta cx16.VERA_CTRL ; data port 1
stz cx16.VERA_ADDR_L
dec cx16.VERA_ADDR_M
bra _nextline
+ lda #0
sta cx16.VERA_CTRL
plx
rts
}}
}
romsub $FFD2 = chrout(ubyte char @ A) ; for consistency. You can also use c64.CHROUT directly ofcourse.
asmsub print (str text @ AY) clobbers(A,Y) {
; ---- print null terminated string from A/Y
; note: the compiler contains an optimization that will replace
; a call to this subroutine with a string argument of just one char,
; by just one call to c64.CHROUT of that single char.
%asm {{
sta P8ZP_SCRATCH_B1
sty P8ZP_SCRATCH_REG
ldy #0
- lda (P8ZP_SCRATCH_B1),y
beq +
jsr c64.CHROUT
iny
bne -
+ rts
}}
}
asmsub print_ub0 (ubyte value @ A) clobbers(A,Y) {
; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
%asm {{
phx
jsr conv.ubyte2decimal
pha
tya
jsr c64.CHROUT
pla
jsr c64.CHROUT
txa
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_ub (ubyte value @ A) clobbers(A,Y) {
; ---- print the ubyte in A in decimal form, without left padding 0s
%asm {{
phx
jsr conv.ubyte2decimal
_print_byte_digits
pha
cpy #'0'
beq +
tya
jsr c64.CHROUT
pla
jsr c64.CHROUT
bra _ones
+ pla
cmp #'0'
beq _ones
jsr c64.CHROUT
_ones txa
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_b (byte value @ A) clobbers(A,Y) {
; ---- print the byte in A in decimal form, without left padding 0s
%asm {{
phx
pha
cmp #0
bpl +
lda #'-'
jsr c64.CHROUT
+ pla
jsr conv.byte2decimal
bra print_ub._print_byte_digits
}}
}
asmsub print_ubhex (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
%asm {{
phx
bcc +
pha
lda #'$'
jsr c64.CHROUT
pla
+ jsr conv.ubyte2hex
jsr c64.CHROUT
tya
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_ubbin (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
%asm {{
phx
sta P8ZP_SCRATCH_B1
bcc +
lda #'%'
jsr c64.CHROUT
+ ldy #8
- lda #'0'
asl P8ZP_SCRATCH_B1
bcc +
lda #'1'
+ jsr c64.CHROUT
dey
bne -
plx
rts
}}
}
asmsub print_uwbin (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
%asm {{
pha
tya
jsr print_ubbin
pla
clc
bra print_ubbin
}}
}
asmsub print_uwhex (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the uword in A/Y in hexadecimal form (4 digits)
; (if Carry is set, a radix prefix '$' is printed as well)
%asm {{
pha
tya
jsr print_ubhex
pla
clc
bra print_ubhex
}}
}
asmsub print_uw0 (uword value @ AY) clobbers(A,Y) {
; ---- print the uword in A/Y in decimal form, with left padding 0s (5 positions total)
%asm {{
phx
jsr conv.uword2decimal
ldy #0
- lda conv.uword2decimal.decTenThousands,y
beq +
jsr c64.CHROUT
iny
bne -
+ plx
rts
}}
}
asmsub print_uw (uword value @ AY) clobbers(A,Y) {
; ---- print the uword in A/Y in decimal form, without left padding 0s
%asm {{
phx
jsr conv.uword2decimal
plx
ldy #0
- lda conv.uword2decimal.decTenThousands,y
beq _allzero
cmp #'0'
bne _gotdigit
iny
bne -
_gotdigit
jsr c64.CHROUT
iny
lda conv.uword2decimal.decTenThousands,y
bne _gotdigit
rts
_allzero
lda #'0'
jmp c64.CHROUT
}}
}
asmsub print_w (word value @ AY) clobbers(A,Y) {
; ---- print the (signed) word in A/Y in decimal form, without left padding 0's
%asm {{
cpy #0
bpl +
pha
lda #'-'
jsr c64.CHROUT
tya
eor #255
tay
pla
eor #255
ina
bne +
iny
+ bra print_uw
}}
}
asmsub input_chars (uword buffer @ AY) clobbers(A) -> ubyte @ Y {
; ---- Input a string (max. 80 chars) from the keyboard. Returns length in Y. (string is terminated with a 0 byte as well)
; It assumes the keyboard is selected as I/O channel!
%asm {{
sta P8ZP_SCRATCH_W1
sty P8ZP_SCRATCH_W1+1
ldy #0 ; char counter = 0
- jsr c64.CHRIN
cmp #$0d ; return (ascii 13) pressed?
beq + ; yes, end.
sta (P8ZP_SCRATCH_W1),y ; else store char in buffer
iny
bne -
+ lda #0
sta (P8ZP_SCRATCH_W1),y ; finish string with 0 byte
rts
}}
}
asmsub setchr (ubyte col @X, ubyte row @Y, ubyte character @A) clobbers(A) {
; ---- sets the character in the screen matrix at the given position
%asm {{
pha
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
txa
asl a
sta cx16.VERA_ADDR_L
tya
; clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
pla
sta cx16.VERA_DATA0
rts
}}
}
asmsub getchr (ubyte col @A, ubyte row @Y) -> ubyte @ A {
; ---- get the character in the screen matrix at the given location
%asm {{
asl a
pha
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
pla
sta cx16.VERA_ADDR_L
tya
; clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
lda cx16.VERA_DATA0
rts
}}
}
asmsub setclr (ubyte col @X, ubyte row @Y, ubyte color @A) clobbers(A) {
; ---- set the color in A on the screen matrix at the given position
; note: on the CommanderX16 this allows you to set both Fg and Bg colors;
; use the high nybble in A to set the Bg color!
%asm {{
pha
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
txa
asl a
ina
sta cx16.VERA_ADDR_L
tya
; clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
pla
sta cx16.VERA_DATA0
rts
}}
}
asmsub getclr (ubyte col @A, ubyte row @Y) -> ubyte @ A {
; ---- get the color in the screen color matrix at the given location
%asm {{
asl a
ina
pha
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
pla
sta cx16.VERA_ADDR_L
tya
; clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
lda cx16.VERA_DATA0
rts
}}
}
sub setcc (ubyte column, ubyte row, ubyte char, ubyte charcolor) {
; ---- set char+color at the given position on the screen
; note: color handling is the same as on the C64: it only sets the foreground color and leaves the background color as is.
; Use setcc2 if you want Cx-16 specific feature of setting both Bg+Fg colors (is faster as well).
%asm {{
phx
lda column
asl a
tax
ldy row
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
tya
;clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
lda char
sta cx16.VERA_DATA0
inc cx16.VERA_ADDR_L
lda charcolor
and #$0f
sta P8ZP_SCRATCH_B1
lda cx16.VERA_DATA0
and #$f0
ora P8ZP_SCRATCH_B1
sta cx16.VERA_DATA0
plx
rts
}}
}
sub setcc2 (ubyte column, ubyte row, ubyte char, ubyte colors) {
; ---- set char+color at the given position on the screen
; note: on the CommanderX16 this allows you to set both Fg and Bg colors;
; use the high nybble in A to set the Bg color! Is a bit faster than setcc() too.
%asm {{
phx
lda column
asl a
tax
ldy row
stz cx16.VERA_CTRL
lda #VERA_TEXTMATRIX_BANK
sta cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
tya
; clc
adc #>VERA_TEXTMATRIX_ADDR
sta cx16.VERA_ADDR_M
lda char
sta cx16.VERA_DATA0
inc cx16.VERA_ADDR_L
lda colors
sta cx16.VERA_DATA0
plx
rts
}}
}
asmsub plot (ubyte col @ Y, ubyte row @ A) clobbers(A) {
; ---- safe wrapper around PLOT kernal routine, to save the X register.
%asm {{
phx
tax
clc
jsr c64.PLOT
plx
rts
}}
}
asmsub width() clobbers(X,Y) -> ubyte @A {
; -- returns the text screen width (number of columns)
%asm {{
jsr c64.SCREEN
txa
rts
}}
}
asmsub height() clobbers(X, Y) -> ubyte @A {
; -- returns the text screen height (number of rows)
%asm {{
jsr c64.SCREEN
tya
rts
}}
}
}
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