prog8/compiler/res/prog8lib/shared_cbm_textio_functions.p8

252 lines
6.7 KiB
Plaintext
Raw Normal View History

2024-03-27 23:04:49 +00:00
txt {
; the textio functions common across CBM-compatible compiler targets (c64, c128, pet32 and cx16)
%option merge, no_symbol_prefixing, ignore_unused
asmsub print (str text @ AY) clobbers(A,Y) {
; ---- print zero terminated string, in PETSCII encoding, from A/Y
2024-03-27 23:04:49 +00:00
; 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 cbm.CHROUT of that single char.
%asm {{
sta P8ZP_SCRATCH_W2
sty P8ZP_SCRATCH_W2+1
2024-03-27 23:04:49 +00:00
ldy #0
- lda (P8ZP_SCRATCH_W2),y
2024-03-27 23:04:49 +00:00
beq +
jsr cbm.CHROUT
iny
bne -
+ rts
}}
}
asmsub print_ubhex (ubyte value @ A, bool prefix @ Pc) clobbers(A,X,Y) {
; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
%asm {{
bcc +
pha
lda #'$'
jsr cbm.CHROUT
pla
+ jsr conv.internal_ubyte2hex
jsr cbm.CHROUT
tya
jmp cbm.CHROUT
}}
}
asmsub print_ubbin (ubyte value @ A, bool prefix @ Pc) clobbers(A,X,Y) {
; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
%asm {{
sta P8ZP_SCRATCH_B1
bcc +
lda #'%'
jsr cbm.CHROUT
+ ldy #8
- lda #'0'
asl P8ZP_SCRATCH_B1
bcc +
lda #'1'
+ jsr cbm.CHROUT
dey
bne -
rts
}}
}
asmsub print_uwbin (uword value @ AY, bool prefix @ Pc) clobbers(A,X,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, bool prefix @ Pc) clobbers(A,X,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,X,Y) {
; ---- print the uword in A/Y in decimal form, with left padding 0s (5 positions total)
%asm {{
jsr conv.internal_uword2decimal
ldy #0
- lda conv.internal_uword2decimal.decTenThousands,y
beq +
jsr cbm.CHROUT
iny
bne -
+ rts
}}
}
asmsub print_uw (uword value @ AY) clobbers(A,X,Y) {
; ---- print the uword in A/Y in decimal form, without left padding 0s
%asm {{
jsr conv.internal_uword2decimal
ldy #0
- lda conv.internal_uword2decimal.decTenThousands,y
beq _allzero
cmp #'0'
bne _gotdigit
iny
bne -
_gotdigit jsr cbm.CHROUT
iny
lda conv.internal_uword2decimal.decTenThousands,y
bne _gotdigit
rts
_allzero lda #'0'
jmp cbm.CHROUT
}}
}
asmsub print_w (word value @ AY) clobbers(A,X,Y) {
; ---- print the (signed) word in A/Y in decimal form, without left padding 0's
%asm {{
cpy #0
bpl +
pha
lda #'-'
jsr cbm.CHROUT
tya
eor #255
tay
pla
eor #255
clc
adc #1
bcc +
iny
+ jmp print_uw
}}
}
asmsub input_chars (uword buffer @ AY) clobbers(A) -> ubyte @ Y {
; ---- Input a string (max. 80 chars) from the keyboard, in PETSCII encoding.
; 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 cbm.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 petscii2scr(ubyte petscii_char @A) -> ubyte @A {
; -- convert petscii character to screencode
%asm {{
sta P8ZP_SCRATCH_REG
lsr a
lsr a
lsr a
lsr a
lsr a
tax
lda _offsets,x
eor P8ZP_SCRATCH_REG
rts
_offsets .byte 128, 0, 64, 32, 64, 192, 128, 128
}}
}
asmsub petscii2scr_str(str petscii_string @AY) {
; -- convert petscii string to screencodes string
%asm {{
sta P8ZP_SCRATCH_W1
sty P8ZP_SCRATCH_W1+1
ldy #0
- lda (P8ZP_SCRATCH_W1),y
beq +
jsr petscii2scr
sta (P8ZP_SCRATCH_W1),y
iny
bne -
+ rts
}}
}
sub print_bool(bool value) {
if value
txt.print("true")
else
txt.print("false")
}
asmsub print_ub0 (ubyte value @ A) clobbers(A,X,Y) {
; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
%asm {{
jsr conv.internal_ubyte2decimal
pha
tya
jsr cbm.CHROUT
txa
jsr cbm.CHROUT
pla
jmp cbm.CHROUT
}}
}
asmsub print_ub (ubyte value @ A) clobbers(A,X,Y) {
; ---- print the ubyte in A in decimal form, without left padding 0s
%asm {{
jsr conv.internal_ubyte2decimal
_print_byte_digits
pha
cpy #'0'
beq +
tya
jsr cbm.CHROUT
txa
jsr cbm.CHROUT
jmp _ones
+ cpx #'0'
beq _ones
txa
jsr cbm.CHROUT
_ones pla
jmp cbm.CHROUT
}}
}
asmsub print_b (byte value @ A) clobbers(A,X,Y) {
; ---- print the byte in A in decimal form, without left padding 0s
%asm {{
pha
cmp #0
bpl +
lda #'-'
jsr cbm.CHROUT
+ pla
jsr conv.internal_byte2decimal
jmp print_ub._print_byte_digits
}}
}
}