RetroNora
Member
Hi,
I got a somewhat uncommon portable/laptop from 1988.
Seems like inspired by Toshiba T3100. Anyways couldn't find any info about it other than:
www.1000bit.it
It came with 40MB SCSI HDD, Miniscribe 8051S to be exact.
And the problem is that after 2 or 3 boots it stopped recognising the drive. Of course have tested the HDD and the cable with other system and they work flawlessly.
The laptop came with NCR 53C80 SCSI controller, kinda popular one- for example in Mac SE/30 or Atari TT030.
The laptop comes with SCSI BIOS:
And some ROM utilities.
(Do not mind some dead lines in that gas plasma.)
SCSI hard drives needs to be initialized by Format/Fixup Utility.
But no matter what I do I'm getting the 'SCSI WRITE ERROR'.
Earlier the drive wasn't doing anything and the HDD LED was shining all the time. But I have found out that there is issue with Termination power on the SCSI bus. It was at 2.04V instead of 5V. When I disconnected TMPWR pin on a system motherboard and connected it directly to 5V on the HDD it started behaving different. Now if I try to save drive parameters I can head the heads doing some activity, but still it ends with 'SCSI WRITE ERROR'. *sigh*
Both the HDD and the controller are terminated, but if I get it correctly it should be 220Ohm to TMPWR and 330 Ohm to GMD, but it is around 150 Ohm to both ground and 5V. Again, the drive works with Adaptec controller with the same cable. Also what is interesting the signals at the SCSI bus are around 3V instead of 5V for high signal. Frankly speaking I don't have much expirience with SCSI so I kinda run out of ideas what can be wrong.
Any ideas what can causing it to behave like that?
Thanks in advance.
I got a somewhat uncommon portable/laptop from 1988.
Seems like inspired by Toshiba T3100. Anyways couldn't find any info about it other than:
1000 BiT - Computer's description
The most extensive web archive of vintage computers, manuals, old ads, brochures, pictures. Manage your vintage computer collection online!
It came with 40MB SCSI HDD, Miniscribe 8051S to be exact.
And the problem is that after 2 or 3 boots it stopped recognising the drive. Of course have tested the HDD and the cable with other system and they work flawlessly.
The laptop came with NCR 53C80 SCSI controller, kinda popular one- for example in Mac SE/30 or Atari TT030.
The laptop comes with SCSI BIOS:
And some ROM utilities.
(Do not mind some dead lines in that gas plasma.)
SCSI hard drives needs to be initialized by Format/Fixup Utility.
But no matter what I do I'm getting the 'SCSI WRITE ERROR'.
Earlier the drive wasn't doing anything and the HDD LED was shining all the time. But I have found out that there is issue with Termination power on the SCSI bus. It was at 2.04V instead of 5V. When I disconnected TMPWR pin on a system motherboard and connected it directly to 5V on the HDD it started behaving different. Now if I try to save drive parameters I can head the heads doing some activity, but still it ends with 'SCSI WRITE ERROR'. *sigh*
Both the HDD and the controller are terminated, but if I get it correctly it should be 220Ohm to TMPWR and 330 Ohm to GMD, but it is around 150 Ohm to both ground and 5V. Again, the drive works with Adaptec controller with the same cable. Also what is interesting the signals at the SCSI bus are around 3V instead of 5V for high signal. Frankly speaking I don't have much expirience with SCSI so I kinda run out of ideas what can be wrong.
Any ideas what can causing it to behave like that?
Thanks in advance.
