First one, Future Domain TMC-845, 8bit scsi

https://stason.org/TULARC/pc/hard-disk-floppy … evices-193.html

Tomek TRV wrote on 2024-05-31, 23:57:

Hi I have two cards that I can't find any information about. 1. 8 bit ISA SCSI controller. How to set jumpers and where can I f […]
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Hi
I have two cards that I can't find any information about.
1.
8 bit ISA SCSI controller. How to set jumpers and where can I find dos drivers?

SCSI2.jpgSCSI1.jpg

2.
Cirrus Logic combo card. How to configure jumpers?
CL1.jpg
CL2.jpg

For DOS drivers for the TMC-845, try PowerSCSI v4.1

As for that VLB combo card...

Con 1 appears to be an IDE connector.
Con 2 appears to be a floppy drive header.
Con 3 & 4 appear to be 9 pin serial headers.
Con 5 appears to be a gameport header.
Con 6 appears to be a parallel port header.
LED1 appears to be the HDD activity LED.

For the actual jumper data... I would personally document current positions of all jumpers, then trial and error move one jumper at a time, and document what changes in the system (with no other cards present).

This is because this seems to be one of the many jillions of UMC based combocards that lacks proper documentation/identification.

Guesswork--

J1 might enable/disable the gameport.

J2 - J4 probably set the IDE mode (Primary, Secondary, Tertiary, Disabled) for the IDE controller (actually, the base IO address for the controller)

J5 - J8 probably configures the IRQ for the IDE controller

J9 probably enables or disables the FDD controller

J10-J14 likely control the COM and LPT port configuration

Again, I would trial and error that before going too gung-ho. This is pure speculation, just from the number of jumpers, and placement on the card.

Great, thank You all for informations.
Maybe somebody else will write something about jumpers on this Cirrus Logic combo card. I think that I have to find some motherboard in my collection with these UMC chips and with known jumpers settings and then trace the paths from jumpers to chips. How do You think - can this work?

SCSI card - I have an external SCSI 25 pin HDD but I dont have a cable. Can I make it from old printer LPT cable? I hope that there is no twisted wires.

Tomek TRV wrote on 2024-06-01, 09:03:

Great, thank You all for informations.
Maybe somebody else will write something about jumpers on this Cirrus Logic combo card. I think that I have to find some motherboard in my collection with these UMC chips and with known jumpers settings and then trace the paths from jumpers to chips. How do You think - can this work?

SCSI card - I have an external SCSI 25 pin HDD but I dont have a cable. Can I make it from old printer LPT cable? I hope that there is no twisted wires.

Printer cable might be possible if you have one that has 25 wires inside and replace the centronics connector that was used for the printer.

Zip drive cable is also an option

And what about twisted wires? Is it just a straight 1-1 cable?