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blitter

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  1. blitter

    Faking an Apple HDD on SCSI2SD

    Is there a particular reason why you don't want to use the patched HD SC Setup utility? I'm just curious.
  2. blitter

    Power Mono Classic Build

    For folks in the Bay Area, I was at WeirdStuff Warehouse this past Sunday and near the entrance of the store, on a shelf they had four new-in-opened-box Miracle MT209A 9" monochrome SVGA CRTs for sale. $50 each. I picked one up for myself but they might still have some left, if you're interested in taking on a similar project to the OP...
  3. blitter

    Mac IIsi, no sound

    It's also possible that the connection from the speaker itself to the logic board might be faulty. My dad had a IIsi with an oxidized speaker connection-- this is a common problem with that model. If a sharp rap to the top of the case will occasionally restore sound, that might be the issue.
  4. blitter

    Power Macintosh 6500/225 (from WeirdStuff)

    I picked up a 23" Cinema HD they had when I visited there this past Saturday. All those Power Macs, ImageWriters, and the Personal LW were still there. The towers are missing bezels, as BMOW's photo shows.
  5. blitter

    Cloning the Pippin Flash ROM board

    I traced the pinout of my GM ROM today just to confirm some of the conjecture in this thread, and raise a couple more questions: https://pastebin.com/nzxFhpXg - Pins 1-2 of the ROM socket indeed are wired to Vpp on all of the GM Flash chips. - /WE is not only present on the GM edge, but it's properly wired to all Flash chips. Whether /WE is configured on the Pippin itself for in-system programming, I don't know. - There are 16 8-bit Flash chips on the GM board instead of the four 16-bit PSOP chips on the retail board. Each Flash chip has 18 address lines vs. the retail board's PSOP chips which have 19. The GM board makes up for this with a 74F86 quad-XOR gate. On two of these gates, one input is tied to pin 22 (A18 on the retail board), the other input is tied to Vcc or GND, and the outputs are tied to all /CE lines on one side of the board. In effect, this splits the ROM image between the two sides of the PCB-- first half on one side, latter half on the other. - Data lines wired to DQ0-7 on one side of the PCB are tied to the opposite lines on the other side of the PCB, i.e. a DQ0 is tied to a DQ7 of its complement chip, DQ1 to DQ6, etc. Does this mean the latter 2MB of the GM ROM have their bytes reversed?
  6. blitter

    running 68040 software on a 68030 machine (7.6)

    Pseud040? http://headgap.com/~michael_connolly/
  7. blitter

    Cloning the Pippin Flash ROM board

    I think top/bottom only matters with regards to writing, specifically a small bootstrap program, and since the Pippin ROM isn't organized that way then it's pretty irrelevant for our purposes.
  8. blitter

    Cloning the Pippin Flash ROM board

    Looks like your pinout of what I assume is the ROM *socket* on the Pippin motherboard matches pin-for-pin my tracing of the retail 1.2 Pippin ROM board, defor (plus filling in a few missing pins in mine, namely the Write Enable, +12V, and /ROM). Thanks for sharing, this is very reassuring. EDIT: Scratch what I said-- of course it's the socket, but it's also the PCB, since it fits in the socket. That's what I get for posting at 230am...
  9. Also, the Option key method is only temporary-- it won't remember your choice across boots. The preference pane "blesses" (is that still the right term in OS X?) the chosen system so you don't have to remember to use the Option key at startup each time.
  10. OS 9 won't boot a G5 (yet) but dual booting between 10.4 and 10.5 sounds like it would work, at least in theory. I've never tried it, but I imagine dual booting between two different versions of OS X would require at least two partitions given its UNIX/BSD underpinnings.
  11. 10.4. SheepShaver is pretty unstable especially with anything that goes "outside the box." You can take a chance with SheepShaver in 10.4 as well for apps that don't work properly in Classic.
  12. blitter

    Running SE/30 with Video ROM removed?

    That is the question.
  13. blitter

    Cloning the Pippin Flash ROM board

    Follow-up to my last post: The bypass caps are probably just bridging Vcc and GND to filter out noise, given their proximity to the Vcc pins on the chips themselves. Probably 0.1uF ceramics or similar.
  14. blitter

    Lot of Macs and peripheral too much to count ...

    That is not a Mac TV. The top bezel seam on the Mac TV goes much deeper than what is shown in that photo. Not to mention that the Mac TV doesn't have top ventilation slots. Is it a black Power Mac 5500??
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