On Sat, Aug 5, 2023 at 6:11 PM Cameron Kaiser via cctalk <[email protected]> wrote: > I have an IMSAI as well, but for me my favourite computer of that era is the > KIM-1, and that's such a simple design there are tons of implementations
I only recently got a KIM-1 (at VCF East). It's been on my list for a while and I was able to get it in a swap not eBay prices so I'm twice as happy. > (though I prefer the original since some of them apparently have edge-case > incompatibilities). I've had a replica for a while and for running code it's an adequate match, but, yes, there are some quirks that do matter. One of the biggest implementation differences from 1976 to today totally matters to me - I have an old TVT 6-5/8 Cheap Video board I got as a kid that needs the "upstream tap" to present different memory contents to the CPU and to the video board, and that in turn depends on how and where the bus is buffered. Most of the simple replicas are either total hardware emulation (KIM Uno) or are so small that they just don't have the same bus buffer arrangement so that would have to be hacked in. Now that I _have_ a KIM-1, I can look at how bad the hackery is and finally see this board in action. -ethan
