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The first option is a flag that enables MPC601 (POWER) instructions for CPUs that are not MPC601. This can be useful for the following reasons: 1) To produce results similar to classic Mac OS which emulates MPC601 instructions on CPUs that don't implement MPC601 instructions. This option is used to compare the risu traces produced in Mac OS 9 on a G3 or G4 with DPPC. 2) May increase performance in apps that use POWER instructions on emulated machines with CPUs that are not MPC601. It is not known if any such apps exist but there could be since Apple included MPC601 emulation in classic Mac OS.
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-24 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 Bandai/Atmark Pippin emulation. */
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/**
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Kudos to Keith Kaisershot @ blitter.net for his precious technical help!
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*/
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#include <cpu/ppc/ppcemu.h>
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#include <devices/common/pci/pcihost.h>
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#include <devices/ioctrl/macio.h>
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#include <devices/memctrl/aspen.h>
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#include <machines/machinebase.h>
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#include <machines/machinefactory.h>
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#include <loguru.hpp>
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int initialize_pippin(std::string& id) {
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LOG_F(INFO, "Building machine Pippin...");
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PCIHost *pci_host = dynamic_cast<PCIHost*>(gMachineObj->get_comp_by_name("AspenPci1"));
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// connect GrandCentral I/O controller to the PCI1 bus
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pci_host->pci_register_device(DEV_FUN(0x10,0),
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dynamic_cast<GrandCentral*>(gMachineObj->get_comp_by_name("GrandCentral")));
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// get (raw) pointer to the memory controller
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AspenCtrl* aspen_obj = dynamic_cast<AspenCtrl*>(gMachineObj->get_comp_by_name("Aspen"));
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// allocate ROM region
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if (!aspen_obj->add_rom_region(0xFFC00000, 0x400000)) {
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LOG_F(ERROR, "Could not allocate ROM region!");
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return -1;
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}
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// configure RAM
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aspen_obj->insert_ram_dimm(0, GET_INT_PROP("rambank1_size")); // soldered onboard RAM
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aspen_obj->insert_ram_dimm(1, GET_INT_PROP("rambank2_size")); // soldered onboard RAM
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aspen_obj->insert_ram_dimm(2, GET_INT_PROP("rambank3_size")); // RAM expansion slot
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aspen_obj->insert_ram_dimm(3, GET_INT_PROP("rambank4_size")); // RAM expansion slot
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// init virtual CPU
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ppc_cpu_init(aspen_obj, PPC_VER::MPC603, false, 16500000ULL);
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return 0;
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}
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static const PropMap Pippin_Settings = {
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{"rambank1_size",
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new IntProperty(4, vector<uint32_t>({4}))}, // fixed size
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{"rambank2_size",
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new IntProperty(1, vector<uint32_t>({1}))}, // fixed size
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{"rambank3_size",
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new IntProperty(0, vector<uint32_t>({0, 1, 4, 8, 16}))},
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{"rambank4_size",
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new IntProperty(0, vector<uint32_t>({0, 1, 4, 8, 16}))},
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{"emmo",
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new BinProperty(0)},
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};
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static vector<string> Pippin_Devices = {
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"Aspen", "AspenPci1", "ScsiMesh", "MeshTnt", "GrandCentral"
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};
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static const MachineDescription Pippin_Descriptor = {
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.name = "pippin",
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.description = "Bandai Pippin",
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.devices = Pippin_Devices,
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.settings = Pippin_Settings,
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.init_func = &initialize_pippin
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};
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REGISTER_MACHINE(pippin, Pippin_Descriptor);
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