Recent content by BFEXTU

I just looked, and my Epson Perfection V500 is actually better than the new Epson. So, I tore open the power supply -- bad electrolytic and other internal damage when the cap failed. So, I am getting a new PS for the scanner. It's probably OK.

I finally got a new scanner! Unfortunately, my other one broke some time ago. So, I should now be able to finish scanning the A/UX docs mentioned in this post above. Miracles can happen!

My ESP32 SoftCard arrived and I have been having some fun with it! CVT, the creator (located in Bulgaria), has done some incredible work on this product! The wide array of features built into this card breathe new life, extended utility and neo-retro fun into Apple II computing! Here are some...

Sorry - I missed the question at the end of your post. I think the latest ROM for Thunder/24 is v3.1. It probably fixes some bugs vs. 3.0 -- and yes, it has PPC compatibility. It may also have additional monitor configs vs. earlier ROMs -- not sure...and may require SuperVideo 3.0...

OK - so that would certainly work, but I'm being dumb. Just boot either board, toggle the accelerator in SuperVideo and carefully probe the Qn pins on both devices to see if any of them toggle. Then you will know which one, if any, is the Rider enable bit. And if so, then the LS259s are the...

OK - so a 10K (Brown-Black-Orange-Gold) pull-up on Q0. The SuperMac accelerator boards have an onboard data/config register. It might be the 2 LS259 devices, or 16 bits of parallel/readable data (with 6 corresponding address lines for serial programming). One possibility is that, for example...

@Fizzbinn - That resistor looks like a possible 10K pull-up to VCC on the LS259 - for Q0 or Q1. Or, instead of VCC, it could be connected to _Clear (but VCC might make more sense). Hard to tell exactly from the picture. What specific pins is it bridging? Maybe an overhead shot would help...or...

The Thunder/GT was post-merger. 3 years later and different design...but similar nextgen/Radius-branded chips -- graphics controller, accelerator, bitshift register, etc.

I just looked at my PDQ+/PopTart board and there's no pin bridging on SMT02 at that location. However, I ohmed the pins and they are shorted. So, for PDQ+, the change was integrated into the design. As above, the PDQ+ went through re-layout to remove the RAM slots from Thunder/24, but the change...

I will also confirm when I locate my boards. But, original and later rev Thunder/24 (circa 1992, etc.) definitely had intentional solder bridges. Ideally, the bridges could have been integrated at the pad level, but weren't...or I seem to have some dim memories regarding this problem -- 1...

i think there were different board revs of the original Thunder/24. The one you have appears to include early rework/fixes. And, there were some intentional solder bridges - maybe power/ground and/or tying unused pins, etc. The board is pretty old at this point and considering that it was out in...

It's perplexing. I am doing remote debugging with someone. I guess I will have to wait until I can see it first-hand. Then, I will try out DiskJockey -- but if the volume works on the PC and on BlueSCSI, I think it should probably work under MacOS SheepShaver.

Yes - I haven't found it useful. Also, the wiki for MacOS doesn't mention anything about adding .hda volumes under MacOS and google searches generate few responses. There is a thread here that implies it should just work...

Does anyone know why a .hda file from BlueSCSI wouldn't work when trying to add it via SheepShaver preferences on a modern MacOS machine? Is there something special about adding volumes to MacOS SheepShaver that is different from the PC? 1. created volume on PC -- works fine under SheepShaver...

Sorry about that. I was referring to BlueSCSI v1, v2 and ZuluSCSI. I think of them as "emulators" because flash is mimicking legacy hard drives on these old machines and my roots are in the era of purely mechanical SCSI. ;) But...a controller is a controller, even if it is attached to a...