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68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "vm.h"
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#ifndef BLKFS_PATH
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#error BLKFS_PATH needed
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#endif
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#define RAMSTART 0
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#define STDIO_PORT 0x00
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// To know which part of RAM to dump, we listen to port 2, which at the end of
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// its compilation process, spits its HERE addr to port 2 (MSB first)
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#define HERE_PORT 0x02
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VM *vm;
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// We support double-pokes, that is, a first poke to tell where to start the
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// dump and a second one to tell where to stop. If there is only one poke, it's
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// then ending HERE and we start at sizeof(KERNEL).
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static uint16_t start_here = 0;
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static uint16_t end_here = 0;
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static uint8_t iord_stdio()
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{
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int c = getc(stdin);
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if (c == EOF) {
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vm->running = false;
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}
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return (uint8_t)c;
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}
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static void iowr_stdio(uint8_t val)
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{
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// comment if you don't like verbose staging output
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putc(val, stderr);
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}
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static void iowr_here(uint8_t val)
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{
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start_here <<=8;
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start_here |= (end_here >> 8);
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end_here <<= 8;
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end_here |= val;
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}
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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vm = VM_init(BLKFS_PATH);
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} else {
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vm = VM_init(argv[1]);
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}
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if (vm == NULL) {
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return 1;
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}
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vm->iord[STDIO_PORT] = iord_stdio;
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vm->iowr[STDIO_PORT] = iowr_stdio;
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vm->iowr[HERE_PORT] = iowr_here;
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while (VM_steps(1));
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// We're done, now let's spit dict data
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for (int i=start_here; i<end_here; i++) {
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putchar(vm->mem[i]);
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}
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VM_printdbg();
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VM_deinit();
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return 0;
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}
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