Posted by: moffman7 on 2025-06-10 16:16:10Do SE/30 PDS cards work? I know there are LC specific but those are hard to come by, I'd like to be able to do 1024x768 if possible
Posted by: croissantking on 2025-06-10 17:10:52
Do SE/30 PDS cards work?
No. 030 PDS is mechanically and electrically incompatible with LC PDS.
Posted by: moffman7 on 2025-06-11 09:10:27
No. 030 PDS is mechanically and electrically incompatible with LC PDS.
Thanks
Posted by: Trash80toHP_Mini on 2025-06-11 11:42:00Always wondered about possible compatibility of 630 PDS with 030 PDS in terns of getting the Radius Color Pivot II/Si up and running? most certainly a hard no on that, but worth a look?
I have tre Radius Color Pivot LC with funky VRAM expansion SIMM, but haven't tried it in anything with the LCIII 32bit PDS. Not sure I've tried it in anything at all?
Posted by: David Cook on 2025-06-11 16:11:18I have a number of LC / LC III video cards that I've successfully tested in the Quadra 630. I agree with the other posts that the IIsi and SE/30 cards definitely do not work.
Posted by: Trash80toHP_Mini on 2025-06-15 09:13:55Looked into LC NIC to 030 PDS conversion for @maceffects at one point. Electrically/signalwise they're very similar. I'd imagine the real difficulty would be in address space mapping differences for going in either direction.
Posted by: maceffects on 2025-06-15 16:26:45
Looked into LC NIC to 030 PDS conversion for @maceffects at one point. Electrically/signalwise they're very similar. I'd imagine the real difficulty would be in address space mapping differences for going in either direction.
Yeah, and that probably would require someone way smarter than me - 🤣 but it certainly within the realm of possibilities.
Posted by: Franklinstein on 2025-06-15 17:01:19I don't know if anybody made an LC PDS adapter, but Daystar (and possibly others) did make adapters to use the same accelerator in multiple different PDSes (SE, SE/30, IIci, IIx, IIsi, etc.). Maybe there's some inspiration to be taken from one of those. They were all variations of the 68000 or 030 bus just like the LC PDS. One difference is that the original LC PDS is only 16 bits wide (the LC III PDS has the extra pins for 32 bits but I don't think I've ever seen a 32-bit card). Another thing to note is that the LC PDS in 040 Macs is emulated (so no CPU upgrades or cache cards or other processor-level devices).
Posted by: Arbee on 2025-06-18 13:04:48The original LC PDS does have all 32 data bus lines. It's missing like 6 of the 32 address bus lines in keeping with the LC's general addressing weirdness.
LC III PDS adds back those missing lines and more slot interrupt signals, so LC III PDS probably could be adapted to run at least some SE/30 cards. But it'd be a major pain making them physically fit I'd imagine.