mirror of
https://github.com/rkujawa/rk65c02.git
synced 2025-04-22 21:37:20 +00:00
CPU emulator should not try to emulate peripherals.
Especially in a lame/incomplete way. These should be later re-added in examples.
This commit is contained in:
Radoslaw Kujawa
parent
b3e49fdb24
commit
8e89ed067a
@ -2,7 +2,7 @@
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#
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UNAME_S := $(shell uname -s)
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LIB_OBJS=rk65c02.o bus.o instruction.o emulation.o debug.o device_ram.o device_fb.o device_serial.o log.o assembler.o
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LIB_OBJS=rk65c02.o bus.o instruction.o emulation.o debug.o device_ram.o log.o assembler.o
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ifeq ($(UNAME_S),Darwin)
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LIB_SO=librk65c02.dylib
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103
src/device_fb.c
103
src/device_fb.c
@ -1,103 +0,0 @@
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/*
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* SPDX-License-Identifier: GPL-3.0-only
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*
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* rk65c02
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* Copyright (C) 2017-2019 Radoslaw Kujawa
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#include <gc/gc.h>
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#include "bus.h"
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#include "device.h"
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#define FB_AS_SIZE 0x1000
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#define CHAR_RAM_SIZE (80*50) /* 0xFA0 */
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#define CHAR_FONT_WIDTH 8
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#define CHAR_FONT_HEIGHT 8
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struct fb_state {
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uint8_t *cram;
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void (*fb_callback_screen_update)(uint8_t *);
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};
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uint8_t device_fb_read_1(void *, uint16_t);
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void device_fb_write_1(void *, uint16_t, uint8_t);
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uint8_t
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device_fb_read_1(void *vd, uint16_t offset)
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{
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device_t *d;
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struct fb_state *f;
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d = (device_t *) vd;
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f = d->aux;
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return f->cram[offset];
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}
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void
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device_fb_write_1(void *vd, uint16_t offset, uint8_t val)
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{
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device_t *d;
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struct fb_state *f;
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d = (device_t *) vd;
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f = d->aux;
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f->cram[offset] = val;
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if (f->fb_callback_screen_update != NULL)
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f->fb_callback_screen_update(f->cram);
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}
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device_t *
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device_fb_init()
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{
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device_t *d;
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struct fb_state *f;
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d = (device_t *) GC_MALLOC(sizeof(device_t));
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assert(d != NULL);
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d->name = "FB";
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d->size = FB_AS_SIZE;
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d->read_1 = device_fb_read_1;
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d->write_1 = device_fb_write_1;
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f = GC_MALLOC(sizeof(struct fb_state));
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assert(f != NULL);
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d->aux = f;
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f->cram = GC_MALLOC(FB_AS_SIZE);
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assert(f->cram != NULL);
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memset(d->aux, 0, FB_AS_SIZE);
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return d;
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}
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void
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device_fb_finish(device_t *d)
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{
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}
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@ -1,9 +0,0 @@
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#ifndef _DEVICE_RAM_H_
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#define _DEVICE_RAM_H_
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#include "device.h"
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device_t * device_fb_init();
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void device_fb_finish(device_t *);
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#endif /* _DEVICE_RAM_H_ */
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@ -1,143 +0,0 @@
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/*
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* SPDX-License-Identifier: GPL-3.0-only
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*
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* rk65c02
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* Copyright (C) 2017-2019 Radoslaw Kujawa
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <gc/gc.h>
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#include "bus.h"
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#include "device.h"
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const static char *txpipepath = "/tmp/rk65c02_serial_tx"; /* should really be configurable */
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const static char *rxpipepath = "/tmp/rk65c02_serial_rx"; /* should really be configurable */
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struct device_serial_priv {
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int txpipefd;
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int rxpipefd;
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};
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uint8_t device_serial_read_1(void *, uint16_t);
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void device_serial_write_1(void *, uint16_t, uint8_t);
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void device_serial_finish(void *);
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uint8_t
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device_serial_read_1(void *vd, uint16_t offset)
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{
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device_t *d;
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struct device_serial_priv *dp;
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ssize_t nread;
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uint8_t val;
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d = (device_t *) vd;
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dp = d->aux;
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switch (offset) {
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case 0x1:
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nread = read(dp->rxpipefd, &val, 1);;
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if (nread == 0)
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val = 0xFE;
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if (nread == -1)
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val = 0xFD;
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default:
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break;
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}
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// XXX: TODO
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return 0xFF;
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}
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void
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device_serial_write_1(void *vd, uint16_t offset, uint8_t val)
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{
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device_t *d;
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struct device_serial_priv *dp;
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d = (device_t *) vd;
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dp = d->aux;
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switch (offset) {
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case 0x0:
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/*fprintf(stderr, "writing to fd %d val %x\n", dp->txpipefd, val);*/
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write(dp->txpipefd, &val, 1);
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fsync(dp->txpipefd);
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break;
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default:
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/* do nothing */
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break;
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}
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}
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device_t *
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device_serial_init()
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{
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device_t *d;
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struct device_serial_priv *dp;
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d = (device_t *) GC_MALLOC(sizeof(device_t));
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assert(d != NULL);
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d->name = "Serial";
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d->size = 4;
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d->read_1 = device_serial_read_1;
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d->write_1 = device_serial_write_1;
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d->finish = device_serial_finish;
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dp = (struct device_serial_priv *) GC_MALLOC(sizeof(struct device_serial_priv));
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assert(dp != NULL);
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d->aux = dp;
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if (mkfifo(txpipepath, S_IRUSR | S_IWUSR) != 0) {
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fprintf(stderr, "Creating FIFO for serial port failed!\n");
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/* perror, handle this failure... */
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}
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if (mkfifo(rxpipepath, S_IRUSR | S_IWUSR) != 0) {
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fprintf(stderr, "Creating FIFO for serial port failed!\n");
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/* perror, handle this failure... */
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}
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dp->txpipefd = open(txpipepath, O_WRONLY);
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dp->rxpipefd = open(rxpipepath, O_RDONLY | O_NONBLOCK);
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return d;
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}
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void
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device_serial_finish(void *dv)
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{
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struct device_serial_priv *dp;
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struct device_t *d;
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d = (struct device_t *) dv;
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dp = d->aux;
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close(dp->txpipefd);
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close(dp->rxpipefd);
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unlink(txpipepath);
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unlink(rxpipepath);
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}
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@ -1,10 +0,0 @@
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#ifndef _DEVICE_SERIAL_H_
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#define _DEVICE_SERIAL_H_
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#include "device.h"
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device_t * device_serial_init();
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void device_serial_finish(device_t *);
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#endif /* _DEVICE_SERIAL_H_ */
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