Initial Yosemite emulation.

2024-05-29 09:41:33 +00:00 · 2023-02-04 18:18:21 +01:00 · 2023-02-04 18:18:21 +01:00 · 92c558f44b
commit 92c558f44b
parent ad2fc290ec
1 changed files with 82 additions and 0 deletions
--- a/machines/machineyosemite.cpp
+++ b/machines/machineyosemite.cpp
@ -0,0 +1,82 @@
+/*
+DingusPPC - The Experimental PowerPC Macintosh emulator
+Copyright (C) 2018-23 divingkatae and maximum
+                      (theweirdo)     spatium
+
+(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+/** @file Construct the Yosemite machine (Power Macintosh G3 Blue & White). */
+
+#include <cpu/ppc/ppcemu.h>
+#include <devices/memctrl/mpc106.h>
+#include <machines/machinefactory.h>
+#include <machines/machineproperties.h>
+
+int initialize_yosemite(std::string& id)
+{
+    LOG_F(INFO, "Building machine Yosemite...");
+
+    // get pointer to the memory controller/PCI host bridge object
+    MPC106* grackle_obj = dynamic_cast<MPC106*>(gMachineObj->get_comp_by_name("Grackle"));
+
+    // connect PCI devices
+    grackle_obj->pci_register_device(
+        13, dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name("Dec21154")));
+
+    // allocate ROM region
+    if (!grackle_obj->add_rom_region(0xFFF00000, 0x100000)) {
+        LOG_F(ERROR, "Could not allocate ROM region!");
+        return -1;
+    }
+
+    // configure CPU clocks
+    uint64_t bus_freq      = 66820000ULL;
+    uint64_t timebase_freq = bus_freq / 4;
+
+    // initialize virtual CPU and request MPC750 CPU aka G3
+    ppc_cpu_init(grackle_obj, PPC_VER::MPC750, timebase_freq);
+
+    // set CPU PLL ratio to 3.5
+    ppc_state.spr[SPR::HID1] = 0xE << 28;
+
+    return 0;
+}
+
+static const PropMap yosemite_settings = {
+    {"rambank1_size",
+        new IntProperty(256, vector<uint32_t>({8, 16, 32, 64, 128, 256}))},
+    {"rambank2_size",
+        new IntProperty(  0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
+    {"rambank3_size",
+        new IntProperty(  0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
+    {"emmo",
+        new BinProperty(0)},
+};
+
+static vector<string> pmg3nw_devices = {
+    "Grackle", "Dec21154"
+};
+
+static const MachineDescription pmg3nw_descriptor = {
+    .name = "pmg3dt",
+    .description = "Power Macintosh G3 Blue and White",
+    .devices = pmg3nw_devices,
+    .settings = yosemite_settings,
+    .init_func = &initialize_yosemite
+};
+
+REGISTER_MACHINE(pmg3nw, pmg3nw_descriptor);