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61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/calls/termios.h"
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#include "libc/isystem/unistd.h"
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#include "libc/math.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/termios.h"
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/**
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* @fileoverview Bare Metal VGA TTY demo.
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*
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* This program can boot as an operating system. Try it out:
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*
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* make -j8 o//examples/vga.com
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* qemu-system-x86_64 -hda o//examples/vga.com -serial stdio
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*
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* Please note that, by default, APE binaries only use the serial port
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* for stdio. To get the VGA console as an added bonus:
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*
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* STATIC_YOINK("vga_console");
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*
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* Should be added to the top of your main() program source file.
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*/
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STATIC_YOINK("vga_console");
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int main(int argc, char *argv[]) {
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volatile long double x = -.5;
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volatile long double y = 1.5;
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struct termios tio;
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char buf[16];
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ssize_t res;
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if (tcgetattr(0, &tio) != -1) {
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tio.c_lflag &= ~(ECHO | ICANON);
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tcsetattr(0, TCSANOW, &tio);
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}
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write(1, "\e[5n", 4);
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res = read(0, buf, 4);
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if (res != 4 || memcmp(buf, "\e[0n", 4) != 0) {
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printf("res = %d?\n", res);
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return -1;
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}
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printf("Hello World! %.19Lg\n", atan2l(x, y));
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// read/print loop so machine doesn't reset on metal
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for (;;) {
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if ((res = readansi(0, buf, 16)) > 0) {
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printf("got %`'.*s\r\n", res, buf);
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}
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}
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}
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