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Work in Progress
This commit is contained in:
Stefan Arentz
parent
15be191d05
commit
cd04241e39
26
ewm.c
26
ewm.c
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@ -28,7 +28,9 @@
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#include <string.h>
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#include "cpu.h"
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#include "dsk.h"
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#include "mem.h"
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#include "mmu.h"
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#include "pia.h"
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// Apple 1 / 8K RAM / WOZ Monitor
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@ -61,6 +63,19 @@ static int setup_apple2plus(struct cpu_t *cpu) {
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return 0;
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}
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// Apple IIe / 128K RAM / Original ROMs
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static int setup_apple2e(struct cpu_t *cpu) {
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struct ewm_mmu_t *mmu = malloc(sizeof(struct ewm_mmu_t));
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mmu_init(mmu, cpu);
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struct ewm_dsk_t *dsk = malloc(sizeof(struct ewm_dsk_t));
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dsk_init(dsk);
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dsk_set_disk_file(dsk, 1, "disks/DOS33-SystemMaster.dsk");
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dsk_set_disk_file(dsk, 2, "disks/DOS33-SamplePrograms.dsk");
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mmu_insert_card(mmu, 6, &dsk->card);
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return 0;
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}
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// Machine Setup
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typedef int (*ewm_machine_setup_f)(struct cpu_t *cpu);
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@ -72,10 +87,11 @@ struct ewm_machine_t {
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};
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static struct ewm_machine_t machines[] = {
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{ "apple1", "Apple 1", setup_apple1 },
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{ "replica1", "Replica 1", setup_replica1 },
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{ "apple2plus", "Apple ][+", setup_apple2plus },
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{ NULL, NULL, NULL }
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{ "apple1", "Apple 1", setup_apple1 },
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{ "replica1", "Replica 1", setup_replica1 },
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{ "apple2plus", "Apple ][+", setup_apple2plus },
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{ "apple2e", "Apple IIe", setup_apple2e },
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{ NULL, NULL, NULL }
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};
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static struct option options[] = {
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@ -118,7 +134,7 @@ int main(int argc, char **argv) {
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argv += optind;
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if (machine == NULL) {
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fprintf(stderr, "Usage: ewm --machine apple1|replica1|apple2plus\n");
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fprintf(stderr, "Usage: ewm --machine apple1|replica1|apple2plus|apple2e\n");
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exit(1);
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}
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78
mmu.c
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78
mmu.c
Normal file
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@ -0,0 +1,78 @@
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// The MIT License (MIT)
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//
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// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include <stdint.h>
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#include "cpu.h"
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#include "mem.h"
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#include "mmu.h"
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//
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// This file implements the Apple IIe MMU. The MMU replaces most
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// memory related logic on older models. It is an integrated chip that
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// can do bank switching, manage memory access, etc. It is really the
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// central hub.
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//
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// It manages all system RAM and ROM by taking ownership of the
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// complete address space. It also provides hooks to manage the
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// extension slots.
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//
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// The MMU implements an Apple IIe Extended 80-Column Card. There is
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// no way to turn this off.
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//
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// We implement a modern Apple IIe memory map as follows:
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//
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//
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// $C100 - $C2FF (49408 - 49919): Extensions to System Monitor
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// $C300 - $C3FF (49920 - 50175): 80-Column Display Routines
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// $C400 - $C7FF (50176 - 51199): Self-Test Routines
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// $C800 - $CFFF (51200 - 53247): More 80-Column Display Routines
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// $D000 - $F7FF (53248 - 63487): Applesoft Interpreter
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// $F800 - $FFFF (63488 - 65535): System Monitor
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// $D000 - $DFFF (53248 - 57343): Bank-Switched RAM (2 Banks RAM, 1 Bank ROM)
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// $E000 - $FFFF (57344 - 65535): Bank-Switched RAM (1 Bank RAM, 1 Bank ROM)
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//
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static uint8_t mmu_read(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr);
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static void mmu_write(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr, uint8_t b);
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// Public API
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void mmu_init(struct ewm_mmu_t *mmu, struct cpu_t *cpu) {
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cpu_add_iom(cpu, 0x0000, 0xffff, mmu, mmu_read, mmu_write);
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}
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void mmu_insert_card(struct ewm_mmu_t *mmu, uint8_t index, struct ewm_crd_t *card) {
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}
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void mmu_remove_card(struct ewm_mmu_t *mmu, uint8_t index) {
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}
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// Private API
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static uint8_t mmu_read(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr) {
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return 0;
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}
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static void mmu_write(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr, uint8_t b) {
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}
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44
mmu.h
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44
mmu.h
Normal file
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@ -0,0 +1,44 @@
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// The MIT License (MIT)
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//
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// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#ifndef EWM_MMU_H
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#define EWM_MMU_H
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#include <stdint.h>
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struct cpu_t;
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struct mem_t;
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struct ewm_crd_t {
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int x;
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};
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struct ewm_mmu_t {
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int x;
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};
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void mmu_init(struct ewm_mmu_t *mmu, struct cpu_t *cpu);
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void mmu_insert_card(struct ewm_mmu_t *mmu, uint8_t index, struct ewm_crd_t *card);
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void mmu_remove_card(struct ewm_mmu_t *mmu, uint8_t index);
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#endif // EWM_MMU_H
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