mirror of
https://github.com/JorjBauer/aiie.git
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* New BIOS interface * New linux framebuffer version * Unified linuxfb and SDL with Teensy * Abstracted VM RAM * Fixed disk image corruption due to bad cache handling * Variable CPU speed support
92 lines
1.8 KiB
C++
92 lines
1.8 KiB
C++
#ifdef TEENSYDUINO
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#include <Arduino.h>
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#endif
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#include "vmram.h"
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#include <string.h>
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#include "globals.h"
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#ifndef TEENSYDUINO
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#include <assert.h>
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#else
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#define assert(x) { if (!(x)) {Serial.print("assertion failed at "); Serial.println(__LINE__); delay(10000);} }
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//#define assert(x) { }
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#endif
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// Serializing token for RAM data
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#define RAMMAGIC 'R'
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VMRam::VMRam() {memset(preallocatedRam, 0, sizeof(preallocatedRam)); }
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VMRam::~VMRam() { }
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void VMRam::init()
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{
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for (uint32_t i=0; i<sizeof(preallocatedRam); i++) {
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preallocatedRam[i] = 0;
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}
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}
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uint8_t VMRam::readByte(uint32_t addr)
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{
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return preallocatedRam[addr];
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}
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void VMRam::writeByte(uint32_t addr, uint8_t value)
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{
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preallocatedRam[addr] = value;
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}
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bool VMRam::Serialize(int8_t fd)
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{
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g_filemanager->writeByte(fd, RAMMAGIC);
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uint32_t size = sizeof(preallocatedRam);
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g_filemanager->writeByte(fd, (size >> 24) & 0xFF);
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g_filemanager->writeByte(fd, (size >> 16) & 0xFF);
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g_filemanager->writeByte(fd, (size >> 8) & 0xFF);
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g_filemanager->writeByte(fd, (size ) & 0xFF);
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for (uint32_t pos = 0; pos < sizeof(preallocatedRam); pos++) {
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g_filemanager->writeByte(fd, preallocatedRam[pos]);
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}
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g_filemanager->writeByte(fd, RAMMAGIC);
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return true;
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}
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bool VMRam::Deserialize(int8_t fd)
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{
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if (g_filemanager->readByte(fd) != RAMMAGIC) {
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return false;
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}
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uint32_t size = 0;
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size = g_filemanager->readByte(fd);
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size <<= 8;
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size |= g_filemanager->readByte(fd);
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size <<= 8;
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size |= g_filemanager->readByte(fd);
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size <<= 8;
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size |= g_filemanager->readByte(fd);
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if (size != sizeof(preallocatedRam)) {
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return false;
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}
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for (uint32_t pos = 0; pos < sizeof(preallocatedRam); pos++) {
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preallocatedRam[pos] = g_filemanager->readByte(fd);
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}
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if (g_filemanager->readByte(fd) != RAMMAGIC) {
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return false;
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}
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return true;
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}
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bool VMRam::Test()
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{
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return true;
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}
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