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Type: Posts; User: Chuck(G)

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  1. Replies
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    Re: soldering iron. Depends on the type and...

    Re: soldering iron. Depends on the type and application; 40W is typical. Whatever, get a temperature-controlled unit. You can do a lot of damage to a PCB with an uncontrolled iron.
  2. I've always used serial (RS232) mice on the old...

    I've always used serial (RS232) mice on the old systems. Since BBSing was a real thing back then, a serial port(s) was a must.
  3. I think so--if you're not certain, you could try...

    I think so--if you're not certain, you could try swapping the drive. A thought has occurred to me. At 1.2MB, you're running the drive at 96 tpi, so alignment is a bit more critical than if you're...
  4. Yeah, no--I want to mount a barrel jack for power...

    Yeah, no--I want to mount a barrel jack for power and a strain relief for a 34 conductor ribbon cable in one. Hence the Superdisk drives.
  5. External drive cases for 3.5" floppy drives

    Up until now, I've been using various cases, from the big IBM PS/2 drive cases to Superdisk LS120 cases, but I've still got a need for a few. Superdisk drives have been getting stupid expensive. ...
  6. Yes, there are differences; I don't know if they...

    Yes, there are differences; I don't know if they make a difference in reading F85 floppies yet. But there are more variations on the drive than you can shake a stick at. I tend to shy away from...
  7. MSDN was a bit strange. ISTR that an MSDN...

    MSDN was a bit strange. ISTR that an MSDN version was licensed for no more than 10 seats according to the EULA. Not that MS had any way of tracking that.
  8. That was SOP for Teac--just tack on a controller...

    That was SOP for Teac--just tack on a controller card and add an "S" to the model number.

    Also, I don't know if it entered the thinking on PC drives--but SCSI is block-addressed protocol (as is...
  9. Also, observe what happened to the floppy...

    Also, observe what happened to the floppy controller itself. It went from a board-level device to a corner of a "super IO" chip--literally free for a motherboard implementation. In fact, there are...
  10. I knew it obtained for hard drives (lots of R&D...

    I knew it obtained for hard drives (lots of R&D spent on those read/write channels) but by mid-1990s, I would have thought that floppy drive channel implementation would be more similar across brands...
  11. What do you think a USB floppy is? There were...

    What do you think a USB floppy is? There were also SCSI floppies as well as "floppy-ish" drives such as the LS120 or Caleb UHD units.

    Bottom line is that by the time floppies hit mass production...
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    For me, the Norsk Data/Tandberg 2200 series...

    For me, the Norsk Data/Tandberg 2200 series terminals were pretty much the top of the mark in 1970s serial terminals. The keyboard on the Beehive SuperBee (I think the keyboard was a GRI model) was...
  13. All 3.5" HD (1.44M) drives are not the same--and neither are 5.25" DD drives.

    Okay, a little background first.

    As a few may know, I've got a couple of Durango F85 8085-based systems. These are 64-256KB boxes with integrated display, printer and disk drives. One system has...
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    Used a 1500 for a few years. Weird...

    Used a 1500 for a few years. Weird terminal--escape sequences use a leadin character of tilde (hex 7E) which is a printable character on most terminals. Attributes take up a space on the display....
  15. Do you really need me to dig up the EULA on a...

    Do you really need me to dig up the EULA on a beta release? I probably have it--it's long and MSDN-specific.
  16. Sticky: I've also got a couple of SMS RLL-to-Mac SCSI...

    I've also got a couple of SMS RLL-to-Mac SCSI boards. At one time, there was a substantial price premium on SCSI over ST506-interface drives, so it made sense to have a "go-between" board to...
  17. Sticky: SCSI is supposed to be a "universal" bus, where...

    SCSI is supposed to be a "universal" bus, where more than one controller as well as devices can share the bus. In addition, there are some devices that can talk to other devices (mostly found in...
  18. READY/ is also an issue for many HD drives, which...

    READY/ is also an issue for many HD drives, which usually use pin 34 for DISK CHANGED, which is not the same thing. Some older systems need READY. Some drives allow you to re-jumper the PCB, but...
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    Ideally, mark and space voltages should be equal,...

    Ideally, mark and space voltages should be equal, but differing in sign, but as Hugo says, this was abused something awful. In the beginning, the level shifting was done with discrete comonents;...
  20. For what it's worth--and I don't know if it has...

    For what it's worth--and I don't know if it has any bearing on your issue--I find that NOS DSHD 5.25" floppies tend to not format up as well as DSDD ones. Could be an issue with the coating. This...
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    The latter could be the case. My XT clones have...

    The latter could be the case. My XT clones have the Omnibridge and DTK Mini-micro boards; the former is WD37C65-based, the latter 8473.
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    You're probably fine. The 8250 was the basic...

    You're probably fine. The 8250 was the basic UART and somewhat speed-limited; early versions (non -A and -B) possessed several "interesting" bugs'. The 16450 extended the maximum speed and...
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    What software/protocol? If there's handshaking...

    What software/protocol? If there's handshaking involved, 115200 is perfectly doable.
  24. Well, if you wanted to be complete with NT 3.1,...

    Well, if you wanted to be complete with NT 3.1, an English-language x86 version, even with RCs would hardly be complete.

    You need the entire language pack as well as versions for MIPS, Power, etc.
  25. But who would even be interested? Most of the...

    But who would even be interested? Most of the betas and RCs have expiry dates, so unless you want to play time machine with your rig checking out buggy software, I don't see the value.
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