ibmapc wrote:This looks great!
Have you had a look at this? http://www.vcfed.org/forum/showthread.php?281 … quivillent-PROM
This is a very […]
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This looks great!
Have you had a look at this? http://www.vcfed.org/forum/showthread.php?281 … quivillent-PROM
This is a very nice write up about the same project http://www.vcfed.org/forum/showthread.php?626 … d-Portable-5155
This provides UMB in the same regions as your project. The advantage for your project is that it should work on clones as well as the IBM 5160.
As always, I'll provide a programmed GAL to anyone interested in trying this mod for the cost of shipping!!
Greg
Thank your very much, Greg! I spent this night reading it and it was very interesting and informative. Thanks, again, Greg. 😀
The computer I'm hoping to get it going to in is an old Nixdorf 8810 M35. I'll do tests on a separate system first, of course.
As often with such classics, care has to be taken of to not damaging them.
luckybob wrote:I'm curious. Why? premade cards are very common. I'm assuming this is intentionally a pet project?
Thanks for your interest, luckybob! 😀 Yes, it is a pet project for one.
Though I also find it less stressing at the moment to build such a behemoth using classic DIP/DIL chips than
getting hold of certain SMD parts in correct size and shape. As you can see, I've got an 1MB card from Lo-Tec/TexElec..
Unfortunately, I haven't gotten yet exactly the SMD chips required for it on usual places like eBay, Amazon or locally
(This may sound odd, but in terms of tinkering,I was raised the oldschool way by my father. We often went to our favorite
electronics store by tram or car and talked to Peter, that friendly dude behind the counter, about our electronics projects.
Akin to some folks would have done in the 60s/70s when they went to their accustomed radio store).
To make sure I get the right parts, especially in the right size, I would have to order them from Mouser
or Farnell using the parts numbers mentioned in the Lo-Tec Wiki, both of which I have no account for yet.
(I ordered the PCB from over sea, so it is too expensive to ruin by trial&error.)
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
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