Building a 486 DOS PC with an ISA Single Board Computer & Backplane
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Date: 2022-04-14
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Comments and reviews: 10
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Since it was designed to plug directly into the pATA port, it likely was never given slave support as that was never its intended use case. You may be able to restore master/slave support by modifying the cable to force it into master/slave mode. All the header selects on ATA drives were 'dumb' headers that did nothing but jumper wires together on the cable. You can do this yourself since the drive obviously has the cable jumpered incorrectly for Master/Slave functionality. Pin 28 is the cable select pin on the IDE cable.
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Since it was designed to plug directly into the pATA port, it likely was never given slave support as that was never its intended use case. You may be able to restore master/slave support by modifying the cable to force it into master/slave mode. All the header selects on ATA drives were 'dumb' headers that did nothing but jumper wires together on the cable. You can do this yourself since the drive obviously has the cable jumpered incorrectly for Master/Slave functionality. Pin 28 is the cable select pin on the IDE cable.
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Tom
The ISA/PCI slots you mention are PICMG. I used to build industrial computers and many systems had these, plus the full-length SBC like in your diagram. Your 486 SBC was manufactured by IEI who are headquartered in Taiwan. We used a lot of their stuff, as well as others such as Advantech and Portwell. When you had an ATX PSU with an SBC, you needed an ATX link cable going from the SBC to the backplane otherwise it wouldn't power on properly. Good times!
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The ISA/PCI slots you mention are PICMG. I used to build industrial computers and many systems had these, plus the full-length SBC like in your diagram. Your 486 SBC was manufactured by IEI who are headquartered in Taiwan. We used a lot of their stuff, as well as others such as Advantech and Portwell. When you had an ATX PSU with an SBC, you needed an ATX link cable going from the SBC to the backplane otherwise it wouldn't power on properly. Good times!
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Guaran
I have 486Eisa Compuadd system that I haven't used in over 20 years. It still has everything except the memory (simms iirc. Any way to tell what the proper memory for this system would be? I bought some off ebay, and it didn't work. I'm sure that the system was working the last time I powered it on in the 90's, and there is old data (not sure what) on the disk that I want to get at.
Anywhere I can find old manuals?
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I have 486Eisa Compuadd system that I haven't used in over 20 years. It still has everything except the memory (simms iirc. Any way to tell what the proper memory for this system would be? I bought some off ebay, and it didn't work. I'm sure that the system was working the last time I powered it on in the 90's, and there is old data (not sure what) on the disk that I want to get at.
Anywhere I can find old manuals?
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Mike
I know this video is 6 months old but I thought I'd recommend something that makes removing tape glue a breeze. I use 3M General Purpose Adhesive Cleaner. Part number 08987
I use this stuff to clean the adhesive left over from stickers and tape off ATMs all the time at work. You just spray it on and let it sit for a minute or two and the adhesive will turn into a gel that you can remove.
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I know this video is 6 months old but I thought I'd recommend something that makes removing tape glue a breeze. I use 3M General Purpose Adhesive Cleaner. Part number 08987
I use this stuff to clean the adhesive left over from stickers and tape off ATMs all the time at work. You just spray it on and let it sit for a minute or two and the adhesive will turn into a gel that you can remove.
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Fiat
Haha. It's very nice to see the SBC and the backplane board, and also the ALi chipset, and a Cirrus Logic chip, it's really a nostalgia to me. I used to use SBCs and backplane boards when I worked as a digital large format printers technical support, may be anyone here used to hear a brand like Vutek? Those early type of Vutek printers used those parts. Now it's just a history, hiks. --
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Haha. It's very nice to see the SBC and the backplane board, and also the ALi chipset, and a Cirrus Logic chip, it's really a nostalgia to me. I used to use SBCs and backplane boards when I worked as a digital large format printers technical support, may be anyone here used to hear a brand like Vutek? Those early type of Vutek printers used those parts. Now it's just a history, hiks. --
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Samuel
If this is as nostalgic to you as it is to me, and you understood every single thing he was saying (was there, done that, that just means we're older than dirt! I love when I hear kids today say, -I build computers- with the pride of a -genius-, like it takes any real skill these days to build a computer. In my day, the cost of ozone was very high, and mistakes could be very costly.
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If this is as nostalgic to you as it is to me, and you understood every single thing he was saying (was there, done that, that just means we're older than dirt! I love when I hear kids today say, -I build computers- with the pride of a -genius-, like it takes any real skill these days to build a computer. In my day, the cost of ozone was very high, and mistakes could be very costly.
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Aaron
Food - might have been a lab pc for some company selling food. I used to build computers for the lab at Singleton Shrimp company in the early 90's and they put labels on the bay covers to identify the computer. Although they went ahead and printed a sticky label rather than hand-writing it. They were using the computer for something involved in creating microwavable TV dinners.
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Food - might have been a lab pc for some company selling food. I used to build computers for the lab at Singleton Shrimp company in the early 90's and they put labels on the bay covers to identify the computer. Although they went ahead and printed a sticky label rather than hand-writing it. They were using the computer for something involved in creating microwavable TV dinners.
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George
Jill is actually kind of a -known issue- with some Crystal-based cards (even some SB cards, surprisingly. You mentioned you tried a number of other versions, so it's probably the case that even if DMA1 were available it wouldn't have helped: some of those versions don't use DMA at all and just do direct port writes to the DSP. It's an odd duck, that one.
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Jill is actually kind of a -known issue- with some Crystal-based cards (even some SB cards, surprisingly. You mentioned you tried a number of other versions, so it's probably the case that even if DMA1 were available it wouldn't have helped: some of those versions don't use DMA at all and just do direct port writes to the DSP. It's an odd duck, that one.
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MrZillas
Me 1997: playing Duke Nukem 3D on DOS/Windows 3. 11
Me 1998: playing Duke Nukem 3D on Windows98
Me 2004: playing Duke Nukem 3D on WindowsXP
Me 2008: playing Duke Nukem 3D on Windows Vista
Me 2009: playing Duke Nukem 3D on Windows 7
Me 2021: playing Duke Nukem 3D on Windows 10
Dont have time to play with myself.
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Me 1997: playing Duke Nukem 3D on DOS/Windows 3. 11
Me 1998: playing Duke Nukem 3D on Windows98
Me 2004: playing Duke Nukem 3D on WindowsXP
Me 2008: playing Duke Nukem 3D on Windows Vista
Me 2009: playing Duke Nukem 3D on Windows 7
Me 2021: playing Duke Nukem 3D on Windows 10
Dont have time to play with myself.
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LabRat
4: 50 hopefully no one was like, trying to store cereals or something in it. Not very well sealing, considering cases are VENTILATED. More realistically, someone's kid prolly wrote on it in crayon as there were learning written language. Probably was a kitchen PC. Might be projecting some old memories here, not sure. Lol.
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4: 50 hopefully no one was like, trying to store cereals or something in it. Not very well sealing, considering cases are VENTILATED. More realistically, someone's kid prolly wrote on it in crayon as there were learning written language. Probably was a kitchen PC. Might be projecting some old memories here, not sure. Lol.
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