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188 lines
3.7 KiB
Lua
188 lines
3.7 KiB
Lua
; Prog8 definitions for the Text I/O console routines for the Virtual Machine
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%import conv
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%option ignore_unused
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txt {
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sub width() -> ubyte {
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%ir {{
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syscall 46 (): r0.w
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returnr.b r0
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}}
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}
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sub height() -> ubyte {
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%ir {{
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syscall 46 (): r0.w
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msig.b r1,r0
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returnr.b r1
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}}
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}
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sub clear_screen() {
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str @shared sequence = "\x1b[2J\x1B[H"
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%ir {{
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load.w r65535,txt.clear_screen.sequence
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syscall 3 (r65535.w)
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}}
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}
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sub cls() {
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clear_screen()
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}
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sub nl() {
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chrout('\n')
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}
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sub spc() {
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chrout(' ')
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}
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sub home() {
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print("\x1b[H")
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}
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sub lowercase() {
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; not supported
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}
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sub uppercase() {
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; not supported
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}
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sub chrout(ubyte char) {
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%ir {{
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loadm.b r65535,txt.chrout.char
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syscall 2 (r65535.b)
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}}
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}
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sub bell() {
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chrout(7)
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}
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sub print (str text) {
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%ir {{
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loadm.w r65535,txt.print.text
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syscall 3 (r65535.w)
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}}
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}
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sub print_ub0 (ubyte value) {
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; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
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print(conv.str_ub0(value))
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}
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sub print_ub (ubyte value) {
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; ---- print the ubyte in decimal form, without left padding 0s
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print(conv.str_ub(value))
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}
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sub print_b (byte value) {
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; ---- print the byte in decimal form, without left padding 0s
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print(conv.str_b(value))
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}
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sub print_bool(bool value) {
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if value
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print("true")
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else
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print("false")
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}
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sub print_ubhex (ubyte value, bool prefix) {
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; ---- print the ubyte in hex form
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if prefix
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chrout('$')
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print(conv.str_ubhex(value))
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}
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sub print_ubbin (ubyte value, bool prefix) {
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; ---- print the ubyte in binary form
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if prefix
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chrout('%')
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print(conv.str_ubbin(value))
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}
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sub print_uwbin (uword value, bool prefix) {
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; ---- print the uword in binary form
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if prefix
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chrout('%')
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print(conv.str_uwbin(value))
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}
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sub print_uwhex (uword value, bool prefix) {
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; ---- print the uword in hexadecimal form (4 digits)
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if prefix
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chrout('$')
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print(conv.str_uwhex(value))
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}
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sub print_uw0 (uword value) {
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; ---- print the uword value in decimal form, with left padding 0s (5 positions total)
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print(conv.str_uw0(value))
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}
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sub print_uw (uword value) {
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; ---- print the uword in decimal form, without left padding 0s
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print(conv.str_uw(value))
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}
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sub print_w (word value) {
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; ---- print the (signed) word in decimal form, without left padding 0's
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print(conv.str_w(value))
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}
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sub input_chars (uword buffer) -> ubyte {
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; ---- Input a string (max. 80 chars) from the keyboard. Returns length of input. (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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%ir {{
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loadm.w r65534,txt.input_chars.buffer
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load.b r65535,80
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syscall 6 (r65534.w, r65535.b): r0.b
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returnr.b r0
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}}
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}
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sub column(ubyte col) {
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txt.chrout(27)
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txt.chrout('[')
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txt.print_ub(col+1)
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txt.chrout(';')
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txt.chrout('G')
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}
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sub plot (ubyte col, ubyte row) {
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; use ANSI escape sequence to position the cursor
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txt.chrout(27)
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txt.chrout('[')
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txt.print_ub(row)
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txt.chrout(';')
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txt.print_ub(col)
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txt.chrout('H')
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}
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sub setchr (ubyte col, ubyte row, ubyte char) {
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plot(col, row)
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txt.chrout(char)
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}
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sub petscii2scr(ubyte petscii_char) -> ubyte {
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; -- convert petscii character to screencode
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ubyte[8] offsets = [128, 0, 64, 32, 64, 192, 128, 128]
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return petscii_char ^ offsets[petscii_char>>5]
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}
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sub petscii2scr_str(str petscii_string) {
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; -- convert petscii string to screencodes string
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cx16.r0 = petscii_string
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while @(cx16.r0)!=0 {
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@(cx16.r0) = petscii2scr(@(cx16.r0))
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cx16.r0++
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}
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}
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}
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