mirror of
https://github.com/dingusdev/dingusppc.git
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109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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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, either version 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file Sander-Wozniak Machine 3 (SWIM3) emulation. */
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#include <fstream>
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#include <limits>
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#include <stdio.h>
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#include <devices/deviceregistry.h>
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#include <devices/common/scsi/scsi_hd.h>
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#include <machines/machinebase.h>
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#include <machines/machineproperties.h>
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#include <devices/common/scsi/sc53c94.h>
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#define sector_size 512
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using namespace std;
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SCSI_HD::SCSI_HD() {
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supports_types(HWCompType::SCSI_DEV);
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std::string hd_image_path = GET_STR_PROP("hdd_img");
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//We don't want to store everything in memory, but
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//we want to keep the hard disk available.
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this->hdd_img.open(hd_image_path, ios::out | ios::in | ios::binary);
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// Taken from:
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// https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file/22986486
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this->hdd_img.ignore(std::numeric_limits<std::streamsize>::max());
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this->img_size = this->hdd_img.gcount();
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this->hdd_img.clear(); // Since ignore will have set eof.
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this->hdd_img.seekg(0, std::ios_base::beg);
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}
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int SCSI_HD::test_unit_ready() {
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return 0x0;
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}
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int SCSI_HD::req_sense(uint8_t alloc_len) {
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if (alloc_len != 252) {
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LOG_F(WARNING, "Inappropriate Allocation Length: %%d", alloc_len);
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}
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return 0x0; //placeholder - no sense
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}
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int SCSI_HD::inquiry() {
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return 0x1000000F;
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}
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int SCSI_HD::send_diagnostic() {
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return 0x0;
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}
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int SCSI_HD::read_capacity_10() {
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return this->img_size;
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}
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void SCSI_HD::format() {}
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void SCSI_HD::read(uint32_t lba, uint16_t transfer_len) {
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uint32_t transfer_size = (transfer_len == 0) ? 256 : transfer_len;
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transfer_size *= sector_size;
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uint32_t device_offset = lba * sector_size;
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this->hdd_img.seekg(device_offset, this->hdd_img.beg);
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this->hdd_img.read(img_buffer, transfer_size);
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}
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void SCSI_HD::write(uint32_t lba, uint16_t transfer_len) {
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uint32_t transfer_size = (transfer_len == 0) ? 256 : transfer_len;
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transfer_size *= sector_size;
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uint32_t device_offset = lba * sector_size;
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this->hdd_img.seekg(device_offset, this->hdd_img.beg);
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this->hdd_img.write((char*)&img_buffer, transfer_size);
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}
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void SCSI_HD::seek(uint32_t lba) {
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this->hdd_img.seekg(0, this->hdd_img.beg);
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}
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void SCSI_HD::rewind() {
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this->hdd_img.seekg(0, this->hdd_img.beg);
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}
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static const PropMap SCSI_HD_Properties = {
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{"hdd_img", new StrProperty("")},
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{"hdd_wr_prot", new BinProperty(0)},
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}; |