Kilian/6502PC
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I/O fixed and tested

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Kilian committed 2026-09-28 19:52:08 +02:00
1 parent a0cabac399
commit e6a2af6f8a
4 files changed
+27 -22
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src/file.c
+13 -8
View File
@@ -37,6 +37,10 @@ int closeFile(int fd) {
}
int readByte(const int fd, uint8_t *data) {
if (files[fd] == NULL) {
return STATUS_READY | STATUS_ERROR;
}
int status = 0;
int count = fread(data, 1, 1, files[fd]);
// Error or EOF
@@ -54,17 +58,18 @@ int readByte(const int fd, uint8_t *data) {
}
int writeByte(const int fd, const uint8_t data) {
if (files[fd] == NULL) {
return STATUS_READY | STATUS_ERROR;
}
int status = 0;
int count = fwrite(&data, 1, 1, files[fd]);
// Error or EOF
if (count != 1) {
int error = ferror(files[fd]);
int eof = feof(files[fd]);
if (error != 0) {
status = STATUS_ERROR;
} else if (eof != 0) {
status = STATUS_EOF;
}
if (count != 1 && ferror(files[fd]) != 0) {
return STATUS_READY | STATUS_ERROR;
}
if (fflush(files[fd]) != 0) {
return STATUS_READY | STATUS_ERROR;
}
return STATUS_READY | status;
src/mem.c
+2 -9
View File
@@ -64,43 +64,36 @@ void writeMemory(uint16_t address, uint8_t value, uint8_t *ram) {
break;
case FILE_COMMAND: {
ram[IO_BASE + FILE_STATUS] = 0;
switch (value) {
case COMMAND_OPEN_R: {
ram[IO_BASE + FILE_STATUS] = 0;
uint16_t fileAddress = ram[IO_BASE + FILE_DATA] | ((uint16_t)ram[IO_BASE + FILE_DATA_HIGH] << 8);
ram[IO_BASE + FILE_STATUS] = openFile(ram[IO_BASE + FILE_DESCRIPTOR], (const char *)&ram[fileAddress], "r");
break;
}
case COMMAND_OPEN_W: {
ram[IO_BASE + FILE_STATUS] = 0;
uint16_t fileAddress = ram[IO_BASE + FILE_DATA] | ((uint16_t)ram[IO_BASE + FILE_DATA_HIGH] << 8);
ram[IO_BASE + FILE_STATUS] = openFile(ram[IO_BASE + FILE_DESCRIPTOR], (const char *)&ram[fileAddress], "w+");
break;
}
case COMMAND_OPEN_A: {
ram[IO_BASE + FILE_STATUS] = 0;
uint16_t fileAddress = ram[IO_BASE + FILE_DATA] | ((uint16_t)ram[IO_BASE + FILE_DATA_HIGH] << 8);
ram[IO_BASE + FILE_STATUS] = openFile(ram[IO_BASE + FILE_DESCRIPTOR], (const char *)&ram[fileAddress], "a+");
break;
}
case COMMAND_CLOSE: {
ram[IO_BASE + FILE_STATUS] = 0;
ram[IO_BASE + FILE_STATUS] = closeFile(ram[IO_BASE + FILE_DESCRIPTOR]);
break;
}
case COMMAND_READ: {
ram[IO_BASE + FILE_STATUS] = 0;
ram[IO_BASE + FILE_STATUS] = readByte(ram[IO_BASE + FILE_DESCRIPTOR], &ram[IO_BASE + FILE_DATA]);
break;
}
case COMMAND_WRITE: {
ram[IO_BASE + FILE_STATUS] = 0;
ram[IO_BASE + FILE_STATUS] = writeByte(ram[IO_BASE + FILE_DESCRIPTOR], ram[IO_BASE + FILE_DATA]);
break;
}