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About Trash80toHP_Mini

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    Bermuda Triangle, NC, USA

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  1. Feeding VGA 31KHz to a Classic II CRT?

    Indubitably, but out of curiosity, what besides the Flyback would need to be swapped out on the stock A/B to achieve workable frequency ranges for higher resolutions/grayscale?
  2. Picked up a QS'02, and other updates.

    Eject Extras 1.0 Created Tue, June 26, 2001 Version: 1.0, Copyright Apple Computer, Inc. 2001 So no Installer from before that date will have it. Looks to me like Apple developed and provided it to address the remarkably inept decision that the QS front bezel design would suffer from implementing a near universal I/O convention. Form over function within the Infinite Loopiness . . . naw!
  3. Mac SE/SE/30 Ethernet Card Recreation

    I haven't looked at the SE PDS pinout, it's a subset of the 030 slot as is the LC/LCII PDS. It also uses the same connector as NuBus and LC. That connector fits within the 10x10cm square for someone to run a batch of inexpensive test PCBs. Such a board would also have space for a couple of other test setups. edit: that would be someone else doing the PCB/testing, not set up for it ATM. But with help, I could map out the connections for a test PCB in Illustrator for someone else's playtime.
  4. Mac SE/SE/30 Ethernet Card Recreation

    This pic of awesome LC PDS multiple slot adapter came up in the eBay finds thread. Looks like it would have to go in one of the expansion boxes to get the lid on it. At any rate it got me thinking about memory mapping. 1 - Each Slot ID has its own layer in the I/O memory mapping chart, so that shouldn't be problematic. 2 - Control line remap appears to be simple enough: 2 - In that case, only the Slot ID remains to be spoofed on an adapter. 3 - The LC NIC assumes it's addressed at /SlotIRQ.E but has no way of knowing which line is pulling its chain. 4 - Remapping /SlotIRQ.E to any of the three available 030 IRQ lines (bold black) requires only the two jumper setup of 030 cards. 5 - As I understand it, the system detects a card on any available interrupt at startup and Slot Manager takes care of the rest. 6 - Slot Manager shouldn't care which line it needs to yank, just that it's servicing whatever was detected at startup. 7 - NIC drivers are commonly set up to handle PDS and NuBus setups alike, so maybe?. Dunno, looks simple enough in my caffeine deprived musings this morning. Anybody got a comment on any of these points?
  5. Feeding VGA 31KHz to a Classic II CRT?

    Looks like some may be available: https://www.alibaba.com/showroom/flyback-transformer-for-sale.html First look: http://www.instructables.com/id/2n3055-flyback-transformer-driver-for-beginners/ I wonder if it might be possible to get an engineering sample of one? Minimum order would be a big problem, sourcing info on physical compatibility would be the first thing to do. Finding one for grayscale might be a problem. PCB's not a problem, single sided blanks can of that size can be milled or etched easily enough or a smaller PCB could be sourced and bolted up to a dead A/B. Can't sell the whole unit per FCC/UL reg compliance here in the US, I assume the same would be true in the EU? Heathkit used to sell home build color TV kits, so that may be a workaround.
  6. Feeding VGA 31KHz to a Classic II CRT?

    One approach I've wondered about would be limited by parts availability on the Flyback front. Engineering a new control board in the AB form factor looks like the only possible solution from everything I've read. I wonder if some Chinese outfit is still making something that might work?
  7. Feeding VGA 31KHz to a Classic II CRT?

    One fly in the ointment there, Mac resolution is 512 x 342 pixels and getting the circuitry up to 384 pixels would be the issue. We got all excited about running the Radius Color Pivot II/IIsi as an internal grayscale card in the SE/30 a while back and it turned out to be a dead end IIRC. That said, another set of eyes looking at the problem from another angle is never a wast of time when it comes to hacking here. You never know what'll shake loose.
  8. Modern PSU for the SE/30

    Most excellent! That vented side panel is pretty interesting, mine (SE/30 & SE) have solid side panels thermal pasted atop the heatsinks in the PSU. Who made that particular PSU and are they common?
  9. Mac SE/SE/30 Ethernet Card Recreation

    IIRC there's another thread of mine with IIci Cache pinout flanked by LCIII/IIsi connectors.
  10. Picked up a QS'02, and other updates.

    Nice! QS'02/Dual 1GHz/9.2.2 is my daily driver for anything offline, you'll love it. Got linkage to that 9.2.2 image? You might wanna check out the universal 9.2.2 image at Mac OS9 lives, gotta join up to get it.
  11. Mac SE/SE/30 Ethernet Card Recreation

    IIRC I've got simplified DELTA versions of that rat's nest diagram or I could cook one up if/when I find the original file. Should I update that thread or post it here. Does someone wanna do a reboot thread? Mine tend to get ignored for the most part. I've been looking ants' WiFi projects and using the Pi Zero Two(?) with a ROM card based adapter or a CPU socket setup for multifunction I/O, but I'm in way over my head yet again.
  12. Join the club! Are you sure the drive can't read CDs? Have you tried a real CD as opposed to the CD-Rs you sound like you've been trying to use? edit: IIRC CD-RW is even harder for early drives to read.
  13. ID Mac Plus 030 upgrade card

    What he said.
  14. Forever Zip, there is no substitute! SCSI enabled Plus and up naturally, with an inexpensive USB drive on the PC. BTW, you've indicated you have SCSI, but haven't specified the target system(s) or OS/versions?
  15. ID Mac Plus 030 upgrade card

    That must be some kick in the pants. The card's probably using VM as main memory at 3x the 8MHz clock of system memory. Without cache on the accelerator, using only the SIMMs on the board would be a nasty bottleneck. That hit's not as bad on the the 16MHz II/IIx/IIcx/SE/30 bus, the cache on adapted IIci accelerators makes up for much of that. Has anyone taken a crack at figuring out how to benchmark memory bus constriction on the SE/30 vs. IIsi and IIci? Isolating that from overall system performance in a handicap league kinda deal might be interesting. That System Saver was born to run on your accelerated Plus.