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UNISYS U6000/50 Help needed! :)
Post 302720217 by asbesto on Tuesday 23rd of October 2012 03:45:05 PM
10-23-2012
UNISYS U6000/50 Help needed! :)
Hi all,
here at our computer museum in Palazzolo Acreide, Italy, we're trying to restore this ancient UNISYS server: (some picture here)
wiki DOT museo DOT freaknet DOT org/?title=UNISYS_U6000/50
(sorry I can't post any URL)
We have casual memory errors but we tested every single SIMM and they are OK. We tried everything; no ripple on power supply, RIFA capacitors changed on power supply, other electrolytic capacitors checked and tested, hot / fresh air on some part of the boards... but sometimes the system run smooth, and sometime it gave us weird errors and lockups.
We removed every unnecessary board; changed the VGA board, clean everything and look for contacts, bad joints, cables and whatsoever. We also made a complete dump of our 650 Mb SCSI hard disk to save data.
Our goal is to restore this UNIX System V. Release 3.2 Version 3.0 back running again!
The meaning of our Museum "Informatica Funzionante" is to restore pieces and to let people have fun(*) using them. So we're restoring it
(*) under our control, obviously!
We have no spare memory board to swap and make other tests, so here we are asking if somebody can have some boards around for this kind of machine.
Another clue can be to create a similar machine to boot this O.S. but it seem very weird - the SCSI HD image show that there's no boot record so we assume system boot via some hardcoded program into the BIOS. Board start as a Phoenix 386 bios but seem hardly different from any known pc from that era. Also, the Western Digital controller chip seem peculiar and I've find no SCSI controller with this same chip - and the kernel, I presume, is compiled for this controller...
Maybe can anyone help us? Any spare board, any old UNISYS similar server in the junkyard, or any kind of hint?
Thank you all
Gabriele
here at our computer museum in Palazzolo Acreide, Italy, we're trying to restore this ancient UNISYS server: (some picture here)
wiki DOT museo DOT freaknet DOT org/?title=UNISYS_U6000/50
(sorry I can't post any URL)
We have casual memory errors but we tested every single SIMM and they are OK. We tried everything; no ripple on power supply, RIFA capacitors changed on power supply, other electrolytic capacitors checked and tested, hot / fresh air on some part of the boards... but sometimes the system run smooth, and sometime it gave us weird errors and lockups.
We removed every unnecessary board; changed the VGA board, clean everything and look for contacts, bad joints, cables and whatsoever. We also made a complete dump of our 650 Mb SCSI hard disk to save data.
Our goal is to restore this UNIX System V. Release 3.2 Version 3.0 back running again!
The meaning of our Museum "Informatica Funzionante" is to restore pieces and to let people have fun(*) using them. So we're restoring it
(*) under our control, obviously!
We have no spare memory board to swap and make other tests, so here we are asking if somebody can have some boards around for this kind of machine.
Another clue can be to create a similar machine to boot this O.S. but it seem very weird - the SCSI HD image show that there's no boot record so we assume system boot via some hardcoded program into the BIOS. Board start as a Phoenix 386 bios but seem hardly different from any known pc from that era. Also, the Western Digital controller chip seem peculiar and I've find no SCSI controller with this same chip - and the kernel, I presume, is compiled for this controller...
Maybe can anyone help us? Any spare board, any old UNISYS similar server in the junkyard, or any kind of hint?
Thank you all
Gabriele
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LEARN ABOUT FREEBSD
aha
AHA(4) BSD Kernel Interfaces Manual AHA(4) NAME
aha -- Adaptec SCSI host adapter driver SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device scbus device aha Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): aha_load="YES" In /boot/device.hints: hint.aha.0.at="isa" DESCRIPTION
This driver provides access to the SCSI bus connected to the Adaptec AHA-154x and AHA-1640 SCSI host adapters. x is 0 for controllers with- out a floppy drive and 2 for controllers that have them. For optimum performance, Adaptec AHA-174x controllers should be configured in enhanced mode and attached via the ahb(4) driver. One device hint entry for every card to be attached by the system is required. Specific values for the port address, IRQ, and DRQ may be specified. If wildcard values are used, the driver will query the device for its current settings and use those. If the port address is a wildcard, the driver consults an internal table of possible port address locations and attaches to the first unattached card it finds. The possible port addresses for this card are 0x330, 0x334, 0x230, 0x234, 0x130, and 0x134. The AHA-1640 is an MCA bus card. Since the MCA bus is a self-identifying bus, no setting of hints is required. HARDWARE
The aha driver supports the following SCSI host adapters: o Adaptec AHA-154xB o Adaptec AHA-154xC o Adaptec AHA-154xCF o Adaptec AHA-154xCP o Adaptec AHA-1640 o Adaptec AHA-174x in 154x emulation mode o DTC 3290 SCSI controller in 1542 emulation mode o Tekram SCSI controllers in 154x emulation mode SEE ALSO
ahb(4), ahc(4), aic(4), cd(4), da(4), sa(4), scsi(4) AUTHORS
The aha driver was ported by M. Warner Losh from the bt driver written by Justin T. Gibbs. BUGS
The AHA-154xA card does not support residuals on data transfers. As a result, this card is no longer supported. There have been some reports that the AHA-154xB does not work well under heavy load. The AHA-154xCP is a plug and play controller. However, its resources are set using the on-board BIOS and cannot be moved. Failures to attached for this card are often caused when the resources set in the BIOS conflict. BSD
July 4, 2004 BSD