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jupo

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Everything posted by jupo

  1. I have an empty 580 shell, a 5260, and a 5500/225. Would it help for me to swap boards around and see what works, or look for psu voltages?
  2. You can always do the bless/unbless trick to have multiple System folders on one partition. I have an external recovery drive set up that way so I can pre-select a certain System version to boot before I hook it up to the computer in question.
  3. So, I have a 5500/225 that I decided to bling out with all the ports, because why not. External video out, AV in, and the TV tuner are all on the way for pretty darn cheap. I have a CS ethernet card, so that's already taken care of. But after that, I still have the right angle PCI slot staring me in the face. What's the best use for PCI on a 5500? I imagine there aren't any video cards that would have a way to use the internal monitor. Is USB the only real expansion that would have been useful on these?
  4. Shivas are powerful and complicated, definitely designed for corporate/education networks with network engineers who know what they're doing. I've found it easy to foul up my entire network just trying to figure everything out. When you get them to work, everything is seamless and transparent. Also, they use the same 3.6v 1/2AA as Macs (soldered) so expect to either replace that or reload the firmware and reconfigure it every time it loses power.
  5. I'm curious if anyone here has direct experience with SCA drives and on what systems. I have had limited success with SCA (80-pin) drives in my setups, except on relatively recent (G3 era) systems. The first obstacle is that they have no circuitry for termination on the drives - they are designed to be plugged into a bus that has active termination at the end, even on an internal chain. I have not yet acquired any internal terminators and so far have only been able to use SCA drives in the middle of a chain with another, terminated drive. Even in this case, I've only gotten them working on late 90s systems with SCSI, whether internal or external. On both older Macs and Amigas just having one connected locks the system up before it ever starts booting, even when everything about the bus should be correct. As more of my drives die and I have five nice SCA drives sitting on the shelf collecting dust, it's been quite a frustration.
  6. I haven't done this, but as long as the box connects all the lines through and isn't making any assumptions about unused pins on serial or parallel, I don't see why it wouldn't work. PS- To be on the safe side, I think I'd make sure all devices were off before switching back and forth.
  7. FYI, that's just referring to the VGA standard horizontal scan rate, which allows 640x480 at a 60Hz vertical refresh rate. By comparison, NTSC composite/S-video/etc is 15kHz, which is why TVs can only refresh alternating scanlines at 60Hz and have a 30Hz full frame refresh rate for a similar resolution. The higher the resolution and/or the higher the frame rate, the faster the horizontal refresh has to be to keep up - I think a 75kHz monitor can handle 1280x1024@70Hz for example. So while we talk about resolutions and refresh rates in terms of the vertical refresh, the horizontal refresh circuitry is the actual limiting factor that determines what a monitor is capable of.
  8. jupo

    SE with no sound

    Ditto. Plenty of SE/30 issues, Classic issues, LCs, etc. No issues with SEs so far.
  9. According to LEM, "LC 475 introduced 1993.10.21 at $900; discontinued 1996.07.15"
  10. jupo

    Centris 650 and SCSI2SD V5.1 query

    That's right. The trick will be getting it partitioned/formatted for the Mac, which becomes much harder if you don't have Apple's utility available. Come to think of it, prepping the drive might even be possible with fancy tricks using an emulator on a PC, but since I don't have a SCSI2SD it's not anything I can even pretend to know about. I think I remember seeing a thread on the forum that discussed setting up cards using other systems.
  11. jupo

    Centris 650 and SCSI2SD V5.1 query

    It is possible, if you can get the drive formatted - and that will depend upon whether you have HD setup or drive setup somewhere on your existing HD. Physically, you should have a spare spot on the SCSI ribbon cable to hook it up where the internal CD would go. You'll also need an understanding of how SCSI bus termination works. If you can get it to the point it is initialized and showing up on the desktop screen as another Mac volume, you can just drag and copy everything from the old drive to the SCSI2SD drive and it should be ready to go. I just did the same on my 575 with a second mechanical drive. If you don't have HD setup on your current hard drive, you'll have to either get it networked (PDS slot ethernet?) or make 1.4MB floppies on another computer to shuffle files over (I haven't had to do this from a PC since the late 90s so I don't recall specifics).
  12. jupo

    Macintosh Plus won't boot from rare HDD

    The lack of proper driver still doesn't explain the bars when just the cable itself is attached. But I also don't think the cable is the issue, especially since it worked on the other Mac. I just don't know if the lack of termination even with only an open cable plugged in could cause that or not? The Plus can be more picky than later systems about SCSI termination. (EDIT: Actually, was it still plugged into the turned off drive? I might have misread that) Regarding the cable, many computer systems used the same 25-pin connector for SCSI as Apple did, and there are also many peripherals didn't use the 50 pin Centronics. The SCSI Zip drive comes to mind, as it also had a DB25 connector and passthrough. I don't have any Apple SCSI cables but I have dozens of generics, DB25 to Centronics, DB25 to DB25, DB25 to HD50, Centronics to HD50... they all work just fine on Macs ranging from the Plus to G3, Amigas, PCs, and Suns. As long as the bus is terminated properly, anyway. Heck, I'm pretty sure I was using a Belkin RS232 serial cable when I used the ZIP drive to boot a system up last week.
  13. jupo

    CJ's miscellaneous finds

    Sure - you can PM me and I can compare with what I have.
  14. jupo

    CJ's miscellaneous finds

    Do you know if it's the same drive sled/caddy thing as the 5xx series? I have a couple extras.
  15. jupo

    Mac Plus floppy drive jammed shut?

    FYI, once you pull the drive out of the case, you can push the manual eject tab more easily than with a paperclip. Get the manual in and out working smoothly before trying to test it powered up.
  16. jupo

    Mac Plus floppy drive jammed shut?

    Almost all of my drives have come back to life with cleaning & lubrication - something like 38 out of 40. Does the manual eject work at all? It could also come from a gear in the eject motor mechanism crumbling apart. If the manual eject works and you clean it up and get good movement in and out manually, but when you have the Mac try to eject it the motor just spins endlessly, you'll know that's the issue. There's a guy selling a precision 3d-printed replacement gear for the one that usually goes, if that's the case.
  17. jupo

    SE/30 System 6 can't initialize hard drive

    Yeah, usually external drives have termination with an external plug in the passthrough port. Internally, you have to set termination on the last (or only) internal drive on the ribbon cable. Older drives had resister packs, but as noted above, the 2GB drive probably has a TE jumper somewhere, I'll agree that while drives sometimes work with improper termination you can't trust them to work reliably. Oh, and about the label, they started to get cheap and didn't make separate labels for the SCSI versions of the drives.
  18. I got lucky with my Futura card (never figured out which specific model, but it's one of the long cards) because it Just Works when I flip the dial to 3. If there's anything I can look at to compare, though, I'll pull it out.
  19. Anyone have any info on this board and what the 9-pin output is? Micrographic Images MEGASCREEN 3, and I am assuming it is SE PDS based on the size. My googlefu is letting me down...
  20. jupo

    128k Macintosh board is it worth much?

    Hmm. I've got a 128k case with a 512k/512ke board inside. Tempting to restore it back to it's original state...
  21. jupo

    HDD + SCSI2SD in Macintosh SE?

    If the Quantum has resistor packs near the 50-pin connector, then it's terminated. Most stock drives should be, since they're installed as the only drive on the bus.
  22. jupo

    Mac SE SuperDrive Sad Mac 000f 000c

    As an aside, I believe this is what I got on an SE/30 when I accidentally tried to boot from an external drive that had my 540c's 7.6.1 install.
  23. jupo

    SE/30s with dim CRTs

    Hey, all. I have four SE/30s out of a large stash that have been in storage (long story) for years. I started going through them this week and I think all four logic boards are generally in working order after a thorough cleaning (apart from obviously needing recapped). But what seems to be new is that all four of them have terribly dim screens. I tried playing with the brightness pot on the analog board on one of them and although it did raise the brightness, it also became blurry and introduced diagonal lines unless I turn the front brightness knob back down to about half to 1/3 as bright as the Plus or SE sitting next to it. I've been digging around but haven't seen any clear answers. I don't see visible issues with the capacitors on the analog boards, but is this where I should start anyway? Or the flyback? Or is scavenging a tube maybe from one of the SE's my only option? Appreciate any and all advice...
  24. jupo

    SE/30s with dim CRTs

    No improvement from swapping everything else from a bright and clear SE with the SE/30 that was otherwise most stable. I guess it is the tubes and I was mistaken on their past status, it was a long time ago. One has obvious burn in, but the others... I dunno. Well, dim or not, these little workhorses are going to be my first logic boards to recap regardless. I can't keep procrastinating, I've already got a Mac II with significant damage and I can only blame myself.
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