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  1. sfiera

    How many floppy drives can a SWIM chip control? (just curious)

    I think all told you would need something along the lines of: A ROM that knows to toggle a particular bit in memory to access a third floppy drive A VIA that maps that bit in memory to an output pin A mux that uses that output pin to split /ENBL2 into two signals It’s hard to say how much work...
  2. sfiera

    How many floppy drives can a SWIM chip control? (just curious)

    Hmm. How many machines without a floppy port have two internal floppies? On single-floppy systems (say, a Q700), I’d assume that the /ENBL2 pin still exists, unused, on the SWIM chip. If you could tap into that, it would let you add a second floppy. Still no guarantee that ROM support for the...
  3. sfiera

    How many floppy drives can a SWIM chip control? (just curious)

    That should be all the hardware that's needed, but you're almost certainly going to need a ROM that knows how to handle that extra enable bit too.
  4. sfiera

    How many floppy drives can a SWIM chip control? (just curious)

    According to my understanding, the IWM has two enable pins (/ENBL1 and /ENBL2), which allow it to natively control two different floppies, so the simple answer is two. But beyond that, it’s possible for software and hardware on either side of it to cooperate in a way that enables additional...
  5. sfiera

    TashTalk: Single-Chip LocalTalk Interface

    Have you tried getting two of your adapters talking so that you get a look at the transmitting and receiving ends at the same time? I’d like to give it a go, or at least do some more work on multitalk to the point where it’s useful to you. I don’t remember exactly how well I was doing at...
  6. sfiera

    内芝製作所 BookcaSE

    After relisting and further price decreases, it did eventually sell for ¥108,000 ($1k).
  7. sfiera

    Looking for GBMac version 1.3.1 - offering a 500$ reward (via paypal) to anyone who can archive/upload it

    The kanji for the developer’s name are probably “内藤 秀樹”, but I couldn’t find any more contemporary references with that either.
  8. sfiera

    Modern G4 Cube PSU replacement?

    Unfortunately, looks like a bust. I decided I’d pick one up to check, but the pin assignment is orthogonal to the Cube PSU’s, and the pins aren’t given separate wires in the cable. It’s a shame, because the fit is pretty good.
  9. sfiera

    Modern G4 Cube PSU replacement?

    I think you’re looking for the KPPX-4P. It’s sometimes called “Power-DIN” (not “DIN” or “Mini-DIN”) but I don’t think that’s an official name for it, and the term doesn’t appear on the KPPX datasheet. In an ideal world, you might be able to pick up this PLUG-P1J-R7B adapter and use a standard...
  10. sfiera

    Trying to recreate the earliest Mac released in Japan (Mac Plus?)

    One of these popped up on Yahoo Auctions again: https://page.auctions.yahoo.co.jp/jp/auction/r465570559 This one seems to be missing the badge in the front, but has some interior photos and a clearer picture of the expanded ROM, which I’ll reproduce here. Apparently the expanded ROM clips over...
  11. sfiera

    Trying to identify a game from memory

    Spaceship Warlock, maybe?
  12. sfiera

    Macintosh Plus Extended Keyboard CAPACITORS

    Oh, the chip’s different: Yours has a 74LS14N inverter. The µPC339C appears to be a comparator.
  13. sfiera

    Macintosh Plus Extended Keyboard CAPACITORS

    It has a M812M0100… (1988) serial number, so it was probably a Plus mouse, but I don’t know if I can say that with confidence. Your mouse matches a G447M0100… that I have. I saw another, seemingly older mouse (no chip) on the forums as well. By the way, here’s the underside. There are a lot...
  14. sfiera

    Macintosh Plus Extended Keyboard CAPACITORS

    They appear to be 47µF 6.3V capacitors: I don’t have a good tool for measuring size, but from the profile, the height appears to be slightly more than the switch box and slightly less than the switch button. I think the case leaves them some good clearance too.
  15. sfiera

    Clamshell left hinge screw

    I have two iBook clamshells I’ve been working on. I stripped them down this far, but in both cases I got stuck at the screw holding the left hinge, the one dead center in this photo: It turns freely, but won’t come out. There’s enough of a gap for the grounding cable to rotate, though. I...
  16. sfiera

    RaSCSI Development Thread

    If you need a Classic-style icon to work with, someone created and uploaded a Pi logo on Macintosh Garden.  
  17. sfiera

    内芝製作所 BookcaSE

    One thing that was still kind of a mystery to me was that “floppy ribbon cable”. I thought it would have to be a pretty specialized part to connect to the computer’s expansion port on one end and the drive on the other. Well, I got a for-parts 5300 today whose floppy drive had cracked plastic...
  18. sfiera

    内芝製作所 BookcaSE

    It’s also got a bigger 11.3” screen, which is a plus for usability, but a minus if you’re going for the Compact Mac aesthetic. I think 10.4” is already pushing it. Given the date of “1 April 1998” on the parts list, I’d guess another reason for the 5300 was that many users would have upgraded...
  19. sfiera

    内芝製作所 BookcaSE

    Up on Yahoo Auctions right now: an Uchishiba Seisakusho BookcaSE. This is an aftermarket conversion case for a color 5300/190. It’s something I’ve been interested in for a while… in fact, here’s what was already set out on my table at home: The auction starts at ¥240,000 (~$2400). I’m...
  20. sfiera

    M0100 no up/down movement

    I opened up my ’84 M0100 to take a look, and found it to be rather different: The most notable difference is the addition of the chip on the upper right, but also significant is the replacement of your 3-pole U1/2/3/4 with two-pole Q1/2/3/4. I’m not very knowledgeable about circuitry, but...
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