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Add pseudoteletypewriter to emulator

Browse source 
https://justine.storage.googleapis.com/emulator628.mp4
This commit is contained in:
Justine Tunney 2020-08-26 23:08:08 -07:00
parent e86cff8ba0
commit 5aabacb361
94 changed files with 3245 additions and 2179 deletions
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29
tool/build/lib/ioports.c
View file

@ -17,13 +17,34 @@
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/fileno.h"
#include "tool/build/lib/ioports.h"
static int OpE9Read(struct Machine *m) {
int fd;
uint8_t b;
fd = STDIN_FILENO;
if (fd >= m->fds.i) return -1;
if (!m->fds.p[fd].cb) return -1;
if (m->fds.p[fd].cb->read(m->fds.p[fd].fd, &b, 1) == 1) {
return b;
} else {
return -1;
}
}
static void OpE9Write(struct Machine *m, uint8_t b) {
int fd;
fd = STDOUT_FILENO;
if (fd >= m->fds.i) return;
if (!m->fds.p[fd].cb) return;
m->fds.p[fd].cb->write(m->fds.p[fd].fd, &b, 1);
}
uint64_t OpIn(struct Machine *m, uint16_t p) {
switch (p) {
case 0xE9:
return getc(stdin);
return OpE9Read(m);
default:
return -1;
}
@ -32,9 +53,7 @@ uint64_t OpIn(struct Machine *m, uint16_t p) {
void OpOut(struct Machine *m, uint16_t p, uint32_t x) {
switch (p) {
case 0xE9:
do {
putc(x, stdout);
} while (x >> 8);
OpE9Write(m, x);
break;
default:
break;