IIRC you don't have to remove the top shielding You're right. I was remembering backwards. The thing that annoyed me was that you had to remove the PSU to remove the top shielding, and with the STE, removing the PSU requires pulling the whole thing out of the case, so there is no simply pulling the...

Excellent. Got garlic converted over to KiCad format, where I am more comfortable browsing. This looks like a very workable solution. The GAL option looks fine, too, but I figure I'll work with the setup that's known to work with the TF536. Thanks much, 8 Bit Dreams ! One thing I notice when looking...

I do recall 2018 @Matze aka Matthias Heinrichs already created a PCB called "Garlic" where two CPUs are placed, saw recently a post on A1k.org where one user used 68000 and TF536 on it and it worked 🤔 Oh very cool. Thanks very much for that. Guess I have to install Eagle now. :lol: I'm still going ...

terriblefire wrote: ↑

Fri Jul 10, 2020 5:35 pm

No the altram and IDE only respond to the 030 lines.

Gotcha. Thanks. I will plan on using the Lightning IDE then.

PhilC wrote: ↑

Fri Jul 10, 2020 4:10 pm

Have you taken the 2 black screws out of the rear near the power switch?

This is what annoys me most about working on an STE. You practically have to disassemble the whole thing in order to get the PSU out. If I'm not mistaken, you even have to take off the top shielding.

If you're gonna do this you need to modify your machine to be able to isolate the arb lines and E. So it seems. So, since the answer isn't powering things down, this raises another question: If I'm isolating the TF536 this way, will the altram and IDE interfaces still work? I'll have IDE on the Lig...

PhilC wrote: ↑

Fri Jul 10, 2020 10:49 am

@derkom your TF536 is at least in the right country now

Barring polar bear attack, it'll arrive next week.

Breaking the signals on the TF536 could be as simple as not soldering those pins on the DIL cpu header and routing them through a switch, pld etc. Oh sure, I'm already having to build a custom relocator board to make the TF536 hopefully fit in the Stacy, so incorporating the necessary signal breaka...

Okay, I confirm that with BR, BG, and E disconnected on one 68000, the H4 will run the diag software with both chips on the bus. Whether or not this can translate into a switchable TF536 is another question, and one I can't test until I have a working 536, but at least this is something to go on. Th...

The venerable PAK/2 accelerator (1990 vintage) already had the capability to switch between accelerated CPU (68020) and 68000. For that, it had to switch three CPU signals: BR, BG, and E. This article is in German but Google Translate and the GAL equations should give you the required information: ...