prog8/compiler/res/prog8lib/cx16textio.p8
2020-08-31 21:01:18 +02:00

315 lines
6.0 KiB
Lua

; Prog8 definitions for the Text I/O and Screen routines for the CommanderX16
;
; Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
;
; indent format: TABS, size=8
%import cx16lib
%import conv
txt {
sub clear_screen() {
c64.CHROUT(147) ; clear screen (spaces)
}
asmsub fill_screen (ubyte char @ A, ubyte txtcolor @ Y) clobbers(A) {
; ---- fill the character screen with the given fill character and character color.
%asm {{
sta P8ZP_SCRATCH_W1 ; fillchar
sty P8ZP_SCRATCH_W1+1 ; textcolor
phx
jsr c64.SCREEN ; get dimensions in X/Y
dex
dey
txa
asl a
adc #1
sta P8ZP_SCRATCH_B1
- ldx P8ZP_SCRATCH_B1
- stz cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
lda cx16.VERA_DATA0
and #$f0
ora P8ZP_SCRATCH_W1+1
sta cx16.VERA_DATA0
dex
stz cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
lda P8ZP_SCRATCH_W1
sta cx16.VERA_DATA0
dex
cpx #255
bne -
dey
bpl --
plx
rts
}}
}
ubyte[16] color_to_charcode = [$90,$05,$1c,$9f,$9c,$1e,$1f,$9e,$81,$95,$96,$97,$98,$99,$9a,$9b]
sub color (ubyte txtcol) {
c64.CHROUT(color_to_charcode[txtcol & 15])
}
sub color2 (ubyte txtcol, ubyte bgcol) {
c64.CHROUT(color_to_charcode[bgcol & 15])
c64.CHROUT(1) ; switch fg and bg colors
c64.CHROUT(color_to_charcode[txtcol & 15])
}
asmsub print (str text @ AY) clobbers(A,Y) {
; ---- print null terminated string from A/Y
; note: the compiler contains an optimization that will replace
; a call to this subroutine with a string argument of just one char,
; by just one call to c64.CHROUT of that single char.
%asm {{
sta P8ZP_SCRATCH_B1
sty P8ZP_SCRATCH_REG
ldy #0
- lda (P8ZP_SCRATCH_B1),y
beq +
jsr c64.CHROUT
iny
bne -
+ rts
}}
}
asmsub print_ub0 (ubyte value @ A) clobbers(A,Y) {
; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
%asm {{
phx
jsr conv.ubyte2decimal
pha
tya
jsr c64.CHROUT
pla
jsr c64.CHROUT
txa
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_ub (ubyte value @ A) clobbers(A,Y) {
; ---- print the ubyte in A in decimal form, without left padding 0s
%asm {{
phx
jsr conv.ubyte2decimal
_print_byte_digits
pha
cpy #'0'
beq +
tya
jsr c64.CHROUT
pla
jsr c64.CHROUT
jmp _ones
+ pla
cmp #'0'
beq _ones
jsr c64.CHROUT
_ones txa
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_b (byte value @ A) clobbers(A,Y) {
; ---- print the byte in A in decimal form, without left padding 0s
%asm {{
phx
pha
cmp #0
bpl +
lda #'-'
jsr c64.CHROUT
+ pla
jsr conv.byte2decimal
jmp print_ub._print_byte_digits
}}
}
asmsub print_ubhex (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
%asm {{
phx
bcc +
pha
lda #'$'
jsr c64.CHROUT
pla
+ jsr conv.ubyte2hex
jsr c64.CHROUT
tya
jsr c64.CHROUT
plx
rts
}}
}
asmsub print_ubbin (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
%asm {{
phx
sta P8ZP_SCRATCH_B1
bcc +
lda #'%'
jsr c64.CHROUT
+ ldy #8
- lda #'0'
asl P8ZP_SCRATCH_B1
bcc +
lda #'1'
+ jsr c64.CHROUT
dey
bne -
plx
rts
}}
}
asmsub print_uwbin (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
%asm {{
pha
tya
jsr print_ubbin
pla
clc
jmp print_ubbin
}}
}
asmsub print_uwhex (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y) {
; ---- print the uword in A/Y in hexadecimal form (4 digits)
; (if Carry is set, a radix prefix '$' is printed as well)
%asm {{
pha
tya
jsr print_ubhex
pla
clc
jmp 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
clc
adc #1
bcc +
iny
+ jmp print_uw
}}
}
; TODO implement the "missing" txtio subroutines
sub setcc (ubyte column, ubyte row, ubyte char, ubyte charcolor) {
; ---- set char+color at the given position on the screen
%asm {{
phx
lda column
asl a
tax
ldy row
lda charcolor
and #$0f
sta P8ZP_SCRATCH_B1
stz cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
lda char
sta cx16.VERA_DATA0
inx
stz cx16.VERA_ADDR_H
stx cx16.VERA_ADDR_L
sty cx16.VERA_ADDR_M
lda cx16.VERA_DATA0
and #$f0
ora P8ZP_SCRATCH_B1
sta cx16.VERA_DATA0
plx
rts
}}
}
asmsub plot (ubyte col @ Y, ubyte row @ A) clobbers(A) {
; ---- safe wrapper around PLOT kernel routine, to save the X register.
%asm {{
phx
tax
clc
jsr c64.PLOT
plx
rts
}}
}
}