Hi Dave,
Actually, I have already thread on the "projects" section about something I'm currently at: http://anycpu.org/forum/viewtopic.php?f=23&t=583&start=75 I'm documenting it all here, but I may post something in hackaday,io too as soon as I have photos to show.

I have already made my first steps with the wincpul tool and at first glance it looks easy enough. But I have difficulties at finding the ATF16V8 or equivalent on Eagle CAD. I want to design a PCB for it, but I got stuck because I can't find the part in the library. Any ideas?

Thanks.

i created an eagle symbol and footprint for my hex decoder project - https://hackaday.io/project/163274-4-bi ... ex-decoder

i've add the 16v8.lbr to the files on that page. you can download it from there!

Next question is could you squeeze 2 or even 4 one byte flip flops into one chip? Basically a register file with W/R, OE and 1-2 bits of address.

i don't have a good answer for you... but based on my experience, it seems very possible...

i did a quick test on my bench and it seems completely doable....

Sounds like 74LS670 register file might be handy. IIRC it has four registers with separate read/write address and data. (Something newer than LS might be desirable (eg.74HCT670)).

Ha! i didn't know those were still in production!

Hehe, 74HC670s are exactly what I'm using. You need four though to get two registers visible at the same time.

so i was looking based on your comment, actually a ATF22V10 would be a single chip solution. it has enough pins and gates for you to implement a single 8-bit register design... same wincupl and programmer as the ATF16v8...

Thanks Dave, This has been useful !

So, can the ATF22V10 be programmed with the TL866 series eeprom programmer as well, same as the ATF16v8 ?. I recall having read elsewhere that the ATF22V10 is particularly difficult to "burn", but maybe that was an outdated info...

i ordered some ATF22v10's in to give it a try... it will be a few weeks before i will get a chance to test...

I've been playing with the 74LS593 register/counters in the past few weeks. I've written a blog post with a description of how they work and some gotchas with using them.

I got my 74LS versions from Utsource for only a few dollars each. I think the HCT ones are much more expensive, and I don't think you can get HC versions.

Hope this is useful.

great write up! you should move some of that content to hackaday.io !

Update: I just got a decent enough logic analyser to measure the real waveforms. I've updated my 74LS593 notes with a commentary on the waveforms at the bottom. Cheers, Warren