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Type: Posts; User: Chuck(G)

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    This is a bit of tongue-in-cheek, but my...

    This is a bit of tongue-in-cheek, but my nomination for the chip that will likely die a-borning is the Parallax Propeller 2. It's taken a long time to get to production (not there yet) and other...
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    I've posted on this before, but if you've trashed...

    I've posted on this before, but if you've trashed a via, there are tiny copper rivets for repair purposes. Once set, they're very durable.
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    Does anyone have the later edition of the One and...

    Does anyone have the later edition of the One and wants an auxiliary keypad for it?
  4. To help you on your search, such connectors are...

    To help you on your search, such connectors are usually called "IDC ribbon cable". "Crimp" usually implies discrete crimp-type pins.

    So do your searches on "DB25M IDC connector"
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    I remember talking in, oh, must have been 1981...

    I remember talking in, oh, must have been 1981 with the 16032 design guys. The thing was not a designed-in-house product and was far more advanced than even the 68K. I was excited--so I asked when...
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    Yeah, it's sad that most of the mainline stuff...

    Yeah, it's sad that most of the mainline stuff has little variety in the ISA.
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    9007 = old Fairchild TTL logic family. 8-input...

    9007 = old Fairchild TTL logic family. 8-input NAND, but pinout somewhat different from 7430.
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    In non-x86, I have a fondness for the old RISC...

    In non-x86, I have a fondness for the old RISC chps: PA-RISC, i860, MIPS... Although I've never got to play with the MC88000, I suspect it was of the same family.
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    Don't know what a QB8345 is. Are you sure that...

    Don't know what a QB8345 is. Are you sure that isn't a date code?

    The chips above are either simple combinatorial logic or simple counters flip-flops latches and drivers. Try some really...
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    "Most logic ICs" I'd amend that to say "most...

    "Most logic ICs"

    I'd amend that to say "most SSI/MSI older logic ICs". Many PROM programmers have the same functionality, but in actual practice are somewhat limited.
  11. Paywalled here.

    Paywalled here.
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    Back around 1983 or so, there were several...

    Back around 1983 or so, there were several equipment vendors (e.g. Plexus) who were selling 68K-equipped systems running Unix SsysV as minicomputer replacements. So, unless you're doing a lot of...
  13. IBM IR keyboard for $3 on Goldmine-electronics.

    $3 NOS in box

    Negotiate shipping with them and it's a real deal.

    Note that I did a github project using a Blue Pill and a simple 3-terminal IR receiver to produce PS/2 keyboard output with one...
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    Of course, you mean x86 processors, right?

    Of course, you mean x86 processors, right?
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    ALTINST is implemented in NASM, but that's as far...

    ALTINST is implemented in NASM, but that's as far as it goes. Here's the link to the original Domas paper. Not terribly helpful if you're looking for specific instruction descriptions, however.
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    Does this help? It's pretty recent....

    Does this help? It's pretty recent.
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    Look up the thread a few postings. I believe I...

    Look up the thread a few postings. I believe I posted something to this effect.
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    I'd always understood the C3 to be a VLIW core...

    I'd always understood the C3 to be a VLIW core design. Is this not true?
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    I didn't say that the drive selects weren't the...

    I didn't say that the drive selects weren't the second (DS1 or DS2, depending on the manufacturer's naming) drive in the chain. After all, all the DSx pins wind up in the same place, right? The...
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    I've seen words about the C3+ chips having an...

    I've seen words about the C3+ chips having an alternate instruction set. Looks interesting, but never had the urge to test it out.

    AIS info
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    Someone must think they're worth something....

    Someone must think they're worth something.

    Note that this one has 14 300GB drives installed.
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    Take a look at the maintenance manual...

    Take a look at the maintenance manual, page 6-29. Note that the upper head assembly uses a felt pad. I can't tell with the drive you've shown.
  23. Thread: DOS mysteries

    by Chuck(G)
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    That's true--there was no standard to DOS 1.x...

    That's true--there was no standard to DOS 1.x disks wrt boot sector data. Originally, you read the second sector and looked at the FAT ID byte and worked from there.

    But then, FAT ID F9h kind of...
  24. Thread: DOS mysteries

    by Chuck(G)
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    But such disks were not bootable, obviously. ...

    But such disks were not bootable, obviously.

    Back in the old 1.x and 2.0 days, we wrote our own IO.SYS, so the check probably wasn't there.
  25. Thread: DOS mysteries

    by Chuck(G)
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    How about the DEC Rainbow? Here's the first few...

    How about the DEC Rainbow? Here's the first few bytes of their MSDOS boot disk. Note that the Rainbow-100 starts off in Z80 mode.


    00000000 f3 1e 00 31 00 11 db 40 e6 03 32 fa 0f 3e 02 32 ...
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