Jochen Kunz sent me two Motorola PowerStack toys. Thank you very much, Jochen. Now I should have the reference machines which I can use for fixing QEMU.
The first one is a classic PowerStack I machine, which looks pretty cool and has some kind of proprietary firmware (PPC1Bug). To connect it via a serial line I had to use pretty much all the cables and adapters I have: short 9F-9F cable, 9M-25F adapter, 25F-25F cable, 25M-9F adapter.
On the desktop Linux side I use GNU screen on a serial line. Found this feature just a few days ago. For those who missed it too, that's how it gets attached to a running screen:
The first one is a classic PowerStack I machine, which looks pretty cool and has some kind of proprietary firmware (PPC1Bug). To connect it via a serial line I had to use pretty much all the cables and adapters I have: short 9F-9F cable, 9M-25F adapter, 25F-25F cable, 25M-9F adapter.
On the desktop Linux side I use GNU screen on a serial line. Found this feature just a few days ago. For those who missed it too, that's how it gets attached to a running screen:
screen -X screen /dev/ttyS0 # note 2 screens, that's not typo
That's what it tells on powering on:
Copyright Motorola Inc. 1988 - 1995, All Rights Reserved PPC1 Debugger/Diagnostics Release Version 1.8 - 10/04/95 COLD Start Local Memory Found =02000000 (&33554432) WARNING: Board Configuration Data Failure MPU Clock Speed =100Mhz WARNING: Keyboard not connected Initializing System Memory (DRAM)... System Memory: 32MB, Parity Enabled (Parity-Memory Detected) L2Cache: NONE, Parity NOT Enabled SelfTest/Boots about to Begin... Press <BREAK> at anytime to Abort ALL SelfTest about to Begin... Press <ESC> to Bypass, <SPC> to Continue RAM ADR: Addressability......................... Running ---> PASSED PC16550 REGA: Register Access....................... Running ---> PASSED PC16550 IRQ: Interrupt.............................. Running ---> PASSED PC16550 BAUD: Baud Rate............................. Running ---> PASSED PC16550 LPBK: Internal Loopback..................... Running ---> PASSED Z8536 CNT: Counter................................ Running ---> PASSED Z8536 LNK: Linked Counter......................... Running ---> PASSED Z8536 IRQ: Interrupt.............................. Running ---> PASSED Z8536 REG: Register............................... Running ---> PASSED SCC ACCESS: Device/Register Access.............. Running ---> PASSED SCC IRQ: Interrupt Request...................... Running ---> PASSED PAR87303 REG: PC87303 Parallel Port's Register/Data.. Running ---> PASSED DEC21040 REGA: PCI Register Access................... Running ---> PASSED DEC21040 XREGA: Extended PCI Register Access......... Running ---> PASSED DEC21040 SPACK: Single Packet Xmit/Recv.............. Running ---> PASSED DEC21040 ILR: Interrupt Line Register Access......... Running ---> PASSED DEC21040 ERREN: ERREN and SERREN Bit Toggle.......... Running ---> PASSED DEC21040 IOR: I/O Resource Register Access........... Running ---> PASSED DEC21040 CINIT: Chip Initialization.................. Running ---> PASSED NCR PCI: NCR 53c8xx PCI Access.................. Running ---> PASSED NCR ACC1: NCR 53c8xx Device Access.............. Running ---> PASSED NCR ACC2: NCR 53c8xx Register Access............ Running ---> PASSED NCR SFIFO: NCR 53c8xx SCSI FIFO................. Running ---> PASSED NCR DFIFO: NCR 53c8xx DMA FIFO.................. Running ---> PASSED NCR IRQ: NCR 53c8xx Interrupts.................. Running ---> PASSED NCR SCRIPTS: NCR 53c8xx SCRIPTs Processor....... Running ---> PASSED I82378 REG: i82378 Register Access................. Running ---> PASSED I82378 IRQ: Interrupt Request...................... Running ---> PASSED AutoBoot about to Begin... Press <ESC> to Bypass, <SPC> to Continue NetBoot about to Begin... Press <ESC> to Bypass, <SPC> to Continue 1) Continue System Start Up 2) Select Alternate Boot Device 3) Go to System Debugger 4) Initiate Service Call 5) Display System Test Errors 6) Dump Memory to Tape Enter Menu #:
It doesn't have anything on its hard drive, so the only reasonable option here is 3):
PPC1-Diag>ioi I/O Inquiry Status: CLUN DLUN CNTRL-TYPE DADDR DTYPE RM Inquiry-Data 0 0 NCR53C825 0 $00 N SEAGATE ST31230W 0456 0 50 NCR53C825 5 $05 Y TOSHIBA CD-ROM XM-4101TA 1084 1 0 PC8477 0 $00 Y <None>
Tried all boot disks I have.
+ Boots Solaris 2.5.1/PPC floppy, which provides some very limited Open Firmware (not even sure it's based on the Firmworks OFW). After booting the floppy it's possible to boot Solaris from a CD. Nice to have, but not my toy of the choice: it works in a little endian mode, which currently doesn't work under QEMU/PReP, and hardly has any software. But if one day all the other OSes emulated I may get back to it.
- Unsurprisingly doesn't boot from any IBM AIX CDs. Already heard that AIX is quite picky about the hardware, was just curious if it gives any error message. It doesn't.
- Surprisingly doesn't boot from the two Motorla AIX CDs I have:
"AOS1_3__RM02" (aka AIX v4.1.4 for Motorola PowerStack II)
"AOS1_4__RM03" (aka AIX v4.1.4r4 for Motorola PowerStack II)
So, obviously the PowerStack II AIX is not compatible with PowerStack I.
* Haven't tried booting Windows NT on it. There is a report in google groups that NT flashes another firmware which can only boot NT and it's not possible to get back to PPC1Bug. On top of that, NT is little-endian, just like Solaris 2.5.1/PPC, so all the considerations from the above apply here too.
The good news: it has an i82378 PCI controller and a NCR53C825 SCSI, which is quite close to what QEMU/PReP/40p target currently emulates.
The bad news: unless I find a boot disk for AIX for Motorola PowerStack I, this machine can not be used for debugging AIX.
The next weekend I'll write about the second toy.
/Stay tuned
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