I am testing a 386 motherboard on an open test environment and I'm not very comfortable with using an AT PSU. I have an ATX to PSU adapter I am going to use but the most convenient ATX PSU I have has no -5V. Do 386 motherboards require -5V to boot, or is this something that ISA cards would require?
Retronautics: A digital gallery of my retro computers, hardware and projects.
No. It is not needed
It is only for small number of ISA boards.
ATX2AT Smart Converter - Live on Kickstarter!
😉
you can also just use a linear regulator inline with an ATX to AT cable to create -5V from the -12V line.
I don't plan to use any old PSUs in my builds, apart from thouroughly inspected/recapped ones maybe, it's the one part where I really don't care about "period accurate" as hardware is far too precious for that.
Motherboards - not.
But some ISA sound cards do require -5V.
Nie tylko, jak widzicie, w tym trudność, że nie zdołacie wejść na moją górę, lecz i w tym, że ja do was cały zejść nie mogę, gdyż schodząc, gubię po drodze to, co miałem donieść.
If I'm not mistaken, Pro Audio Spectrum 16 is one of those ISA cards that need -5v.
PS: There are ATX to AT converters you can buy that do include the -5v, I have several. However, the eBay seller seems to have closed his store. I wanted to buy a few more a while back but, alas...
I don't believe I have any sound cards that require -5V, I doubt even the SnarkBarker requires it. As long as the motherboard plays ball, I'm OK 😀
Retronautics: A digital gallery of my retro computers, hardware and projects.
imi wrote on 2020-05-30, 11:02:ATX2AT Smart Converter - Live on Kickstarter! […]
ATX2AT Smart Converter - Live on Kickstarter!
😉
you can also just use a linear regulator inline with an ATX to AT cable to create -5V from the -12V line.
I don't plan to use any old PSUs in my builds, apart from thouroughly inspected/recapped ones maybe, it's the one part where I really don't care about "period accurate" as hardware is far too precious for that.
I understand that point but do I remember correctly reading that many (even good ones) modern PSU are not that good for retro stuff not only for the 5V strength but also for 3,3 and 5V stability? I remember reading those famous PSU in-deep reviews where they tested also how good they could be with old standards but many one seems to be not exactly suggested for that usage. I don't remember the name of the reviewer.
appiah4 wrote on 2020-05-30, 11:56:I don't believe I have any sound cards that require -5V, I doubt even the SnarkBarker requires it. As long as the motherboard plays ball, I'm OK 😀
Sound Blaster 2.0 doesn't work properly without one. SnarkBarker is a replica of SB 1.0 AFAIK so doesn't need one.
There is ISA Cards & Devices Requiring -5V
