mirror of https://github.com/rkujawa/rk65c02.git
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
/*
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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) 2017-2021 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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uint8_t device_ram_read_1(void *, uint16_t);
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void device_ram_write_1(void *, uint16_t, uint8_t);
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uint8_t
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device_ram_read_1(void *vd, uint16_t offset)
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{
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device_t *d;
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uint8_t *ram;
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d = (device_t *) vd;
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ram = d->aux;
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return ram[offset];
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}
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void
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device_ram_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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uint8_t *ram;
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d = (device_t *) vd;
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ram = d->aux;
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ram[offset] = val;
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}
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device_t *
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device_ram_init(uint16_t size)
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{
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device_t *d;
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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 = "RAM";
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d->size = size;
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d->read_1 = device_ram_read_1;
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d->write_1 = device_ram_write_1;
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d->finish = NULL;
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d->aux = GC_MALLOC(size);
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assert(d->aux != NULL);
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memset(d->aux, 0, size);
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return d;
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}
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