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Modern IBM PC XT implementation?

A

A. Fig Lee

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Joined
Feb 15, 2019
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12
Anyone has seen such?
I mean on more modern chip base.
For example, there is no need to use dynamic RAM, since we may replace it with a couple of static.
Similar for logic: with GAL/PAL may be significantly reduced number of chips.

What I want: a few ISA slots, parallel/serial port and ability to run at standard 4.77 MHz frequency.

I could not find any such projects, I did saw FPGA implementation, but this not what I'm looking for.
Just cut in board space, maintaining all possible useful functionality.
 
That one is based on the faraday chip, which is technically a vintage component, but you can still find them if you look enough. He recently posted on his twitter about testing a pin compatible proton brand chip, I’m not sure if that’s easier to find or not.

github.com

GitHub - skiselev/Proton_Turbo_XT: Attempt to reverse-engineer a Proton PT8010AF based Turbo XT motherboard

Attempt to reverse-engineer a Proton PT8010AF based Turbo XT motherboard - skiselev/Proton_Turbo_XT
github.com github.com

https://twitter.com/x/status/1461080653835821059
 
I can vouch for the EMM board as a fun project, but if you're wanting a 100% compatible turnkey 5160 experience, I wouldn't promise it. The keyboard controller is a much more modern one grafted on, DMA is optional, and some of the support chips are replaced by barest-minimum substitutes. (This led to a fun bug where the speaker would end up stuck on or off because port 61 was implemented as a write-only).

I do think the flash drive as a mass storage device is a better idea than the CompactFlash based solutions-- CF cards are sort of sunsetting as a consumer product these days, so it's nice to just buy a $2.99 flash drive anywhere, but I suspect the CF based ecosystem has a lot more bulletproofing and experience behind it.

The one big thing I've tried and haven't been able to get working is Minix/8086-- it stalls at the "please enter date" prompt-- not sure if it's expecting the keyboard controller to behave differently than it actually does or some other deeper incompatibility I don't know about.
 
I personally favor Sergey's XI-8088. Problem: you cannot download the Gerber files anymore. Maybe if you asked him nicely?
So far both my boards worked w/o any problem. Of course you'll need a backplane. In one case I use the backplane of an unknown brand that enables me to use the board in an IBM XT compatible case.
The advantages of the XI-8088: no custom IC's, just plain 74xxx etc. Speed: 16 MHz.
 
Ruud said:
I personally favor Sergey's XI-8088. Problem: you cannot download the Gerber files anymore. Maybe if you asked him nicely?
So far both my boards worked w/o any problem. Of course you'll need a backplane. In one case I use the backplane of an unknown brand that enables me to use the board in an IBM XT compatible case.
The advantages of the XI-8088: no custom IC's, just plain 74xxx etc. Speed: 16 MHz.
Click to expand...
Yes, that what I want, I think
 
jafir said:
It let me download them, I just had to click the arrow on the right side, the file name on the left isn't a link.
Click to expand...
Yes, indeed! I never noticed those little arrows at the right. I was purely fooled by the fact that you can click on some files but you cannot on others. Thank you very much!
 
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