AMIGA EMULATOR MAC PPC GENERATOR
AMIGA EMULATOR MAC PPC PC

QEMU now can emulate a minimal OF for spapr called VOF (Virtual Open Firmware) which could be used to replace the firmware at least for some guest OSes such as Linux and MorphOS but AmigaOS boot loader still needs firmware ROM. I've also made some experiments to port OpenFirmware to Pegasos2 but it did not work in a generic way so that it could be used by multiple boards and would have needed similar modifications to emulate the different device tree. Fixing OpenBIOS to be usable would help to make it more generic and also fix problem with MorphOS on mac99 while reimplementing SmartFirmware based firmware may be more compatible to real hardware but would add yet another firmware to QEMU which may not be desirable. Possible solutions are: reimplementing it from the open source parts it consists of (the BIOS emulator is likely based on x86emu similar to what is described here or how it's implemented in Pmon 2000) or replacing it with one of the existing open firmware implementations in QEMU (OpenBIOS or SLOF) but those would need to be modified to provide the info as guests running on Pegasos 2 expect. As the board's firmware is not open source it cannot be redistributed and it also cannot be included in QEMU or uploaded here which is a problem that needs to be solved. The device tree can be seen in PegasosII_OFW-Tree.txt and all other info about the open firmware implementation in PegasosII_OFW-Dump.txt.

AMIGA EMULATOR MAC PPC PC

Apart from board specific initialisation it also integrates a BIOS emulator which is used to run option ROM of PC video cards and support for Amiga FFS file system for booting MorphOS. The board has an Open Firmware implementation that is based on CodeGen's SmartFirmware but it is not identical to the open source version as it has modifications from bPlan that were not open sourced. (QEMU already has some implementation of the VT82C686B which is used by the mips_fulong2e board.) The VT8231 is also very similar to the VT82C686B so information about that chip could also be useful. Documentation of the MV64361 and VT8231 chips are not freely available (so cannot be uploaded or linked here) but it may be possible to find these on-line by searching for MV6 and VT8231 respectively. The schematics of the board was also published by Genesi and is freely available.

AMIGA EMULATOR MAC PPC GENERATOR

W83194 clock generator with I2C interface.IEEE1394 (Firewire) port (from VIA VT6306 chip).1 VIA Rhine II VT6102 compatible 100Mbit Ethernet port (from VT8231).

AC97 sound (from VT8231) with Sigmatel STAC9766 codec.PS/2 keyboard and mouse ports (from VT8231).2 ATA100 IDE ports, floppy, serial, parallel and game ports (from VT8231).Marvell Discovery II MV64361 North Bridge.PowerPC CPU card, either 600MHz G3 (750CXe) or 1GHz G4 (7447), 133MHz bus clock.

For reference here are the specifications in short: The CPU is on a separate card and can be a passive cooled G3 (750CXe) or a G4 (7447) with active cooling.

These two chips provide almost all of its functions (except Firewire which is not needed to boot so it will be ignored for now). The bPlan/Genesi Pegasos II is built around the Marvell Discovery II MV64360 family PowerPC system controller chip, specifically the MV64361 version and a VIA VT8231 integrated SuperIO/South Bridge. First step is to gather all information about the board so we get to know it. So let's explore what's needed to implement it in QEMU.

MorphOS runs on the QEMU mac99 emulation but needs changes to OpenBIOS that could not be upstreamed and AmigaOS doesn't run on Mac hardware so having a board with a BookS CPU that can run all Amiga like OSes could be useful for KVM acceleration on BookS PPC hosts and allowing AltiVec/VMX under AmigaOS too. While QEMU already has sam460ex board that can run Amiga like OSes, that is based on an embedded PPC440 ( BookE) core SoC which cannot use KVM on PPC hosts and lacks some advanced PPC features such as AltiVec/VMX which could be used by some programs to run faster via exploiting QEMU's ability to translate these to corresponding host vector instructions where possible. This subproject is about implementing emulation of Pegasos2 board which can run Linux and several Amiga like and other OSes.

Amiga emulator mac ppc