Recent content by AlexTheCat123

Haha yeah, I've heard that the TXS shifter oscillation thing is particularly common! I only went with transistors for the bidirectional signals; all of my unidirectional signals use LVC245's for 5V -> 3.3V shifting and HCT245's for 3.3V -> 5V shifting. No point in using the bulky transistor...

I've been talking to the guy who did the port, and it's impressive how quick he was able to pull it off. I'll be getting my hands on a MiSTer soon so I can test it out!

Yeah, I hope they're not famous last words too. But I tend to think that the people who bought these are a rather technically-inclined audience, so they'd know how to fix basic issues that may crop up and would know to read the manual in full before reaching out and asking for help. But we'll...

We haven't really discussed that; I'm not sure. I obviously know how they work better than anyone else, so maybe that would fall onto me. I tested all of them pretty extensively before sending them out, and the readme in the GitHub repo explains how to set it up and covers all of the common...

Emphasis on the -ish part of soonish, but yeah.

Well, JCM updated the boards to be in stock on his site, and they're already all sold out before I even had time to make a post on here. MacEffects sold out yesterday before I had time to make a post too, but people who were signed up on the mailing list should've at least received an email...

Alright, he picked a license for the SCC (GNU GPL 3.0) and stuck it on GitHub. Enjoy! https://github.com/vz50938/z8530_scc 🤣🤣🤣

Haha no, unfortunately it doesn't require either of those! Just the SCC and some other components that already have readily-available cores. I talked to him about the license thing and he's working on picking one right now. He definitely wants it to be open-source though!

Yeah, the multi-clock thing is really nice here because in the Lisa, Serial A was always clocked from the 4MHz PCLK, but Serial B could be clocked from an external 3.672MHz crystal. So this allows us to perfectly simulate that! Sure, I'll message him and see what sort of license he would like...

Somebody (who I believe wishes to remain anonymous) reached out to me on LisaList2 when they heard about my predicament with the fake SCC chips and offered to help write an SCC while I worked on other aspects of getting the boards running. This is what he came up with, and it works great in all...

It looks like the final person preordered, so I can make the GitHub repo public. Here it is! https://github.com/alexthecat123/LisaFPGA And with that, both the MacEffects and JCM product pages are live. You can't order yet (not until they actually have the boards on-hand), but you should be...

I just shipped all of the boards out to JCM and MacEffects this morning, and they should arrive to them on Monday. At that point, anyone who preordered will get their order fulfilled from MacEffects, and then purchasing will go live for everyone else. I'll also make the Github repo public at...

My ultimate plan is to design a second version of the LisaFPGA board that does just slide on into the back of a Lisa case, but that may be a few months off in the future. I need to get this first version out the door first! Also, I have indeed reverse-engineered the XLerator and have talked...

Yeah, I promise it's not me trying to be greedy or anything! I genuinely could've achieved something around that $150 price a few months ago, but with increasing chip prices, it's just not possible anymore. I didn't realize how much things had gone up at the time when I made that $150...

If you want to be notified the moment that the LisaFPGA boards go on sale, fill out this form! Keep in mind that it'll probably still be a few weeks from now though. https://forms.gle/i4vdADcm5yNm8XUk7