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Type: Posts; User: Chuck(G)

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    Well, VLIW had some promise for do-it-yourself...

    Well, VLIW had some promise for do-it-yourself instructions. Or customer-supplied microcode.

    Maybe we're all doomed to differing architectural "tweaks". X86 probably is the best of all possible...
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    No, the DMA (initially 2-channel) was a full...

    No, the DMA (initially 2-channel) was a full 20-bit implementation, like the 8089.

    Let's face it, the peripherals on the PC were 8085-era holdovers. No way someone would design them the way...
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    Intel had hitched its wagon to the iAPX432 for...

    Intel had hitched its wagon to the iAPX432 for advanced deployment in the late 1970s. Definitely not RISC and probably was far more difficult to manufacture than the 8086. Our Intel sales rep at...
  4. Thread: File Dropbox

    by Chuck(G)
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    I use box.com myself. Seems to do the job.

    I use box.com myself. Seems to do the job.
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    ...and WD can add their own "tweaks" and...

    ...and WD can add their own "tweaks" and "features" to the ISA without clearing them with any licensing agency. I suspect that WD's RISC-V implementation is full of WD "features".

    My surprise...
  6. 256KB (parity) were usual for these on 286...

    256KB (parity) were usual for these on 286 boards.

    The 16-pin sockets would probably take 41256 or equivalent.
    The 20-pin sockets would likely be 1Mx1 (e.g. Toshiba 511000, or NEC D421000 or the...
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    "RISC-V is now starting to gain fast. According...

    "RISC-V is now starting to gain fast. According to Western Digital, it is probably the biggest architecture by chip count already (WD and many others have already moved away from ARM for their drive...
  8. Given the values, I suspect a plain old...

    Given the values, I suspect a plain old electrolytic will do just fine.
  9. The "combo" memory layout was not uncommon in the...

    The "combo" memory layout was not uncommon in the later 80286 boards; 256K, 1M and SIPP. If you want to use SIMMs, you can use a SIMM socket inserted into the SIPP sockets--the pinout's the same. ...
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    No, just the far end.

    No, just the far end.
  11. Much the same reason that I don't care much for...

    Much the same reason that I don't care much for HP online anymore. I'd love to know where they moved all of the documentation and software for their older PCs.
  12. I'm not surprised--M$ appears to be on a campaign...

    I'm not surprised--M$ appears to be on a campaign to eliminate everything not W10 nowadays.
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    Unidirectional--as I said, terminated through...

    Unidirectional--as I said, terminated through 220/330 ohms on the far end, which uses bog-standard LSTTL as receivers.
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    Sloppy fingers--it's the 74BCT760...

    Sloppy fingers--it's the 74BCT760
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    If you were after the original, why not look for...

    If you were after the original, why not look for the Kyocera 85? After all, Tandy didn't design or initially produce this thing.
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    Cheat on driving long OC loads?

    I'm working on a design that involves driving 5V 220/330 ohm terminated lines, TTL levels. The spec calls for OC drivers, but I'm wondering if I can get away with driving 1-2 m lines at about 1.4...
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    The 5150 floppy controller used the SLT packages...

    The 5150 floppy controller used the SLT packages as well, which always seemed to me to be a bit strange, seeing as how IBM was working to use commodity parts for the 5150.
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    I thought that the OP said that he had a DOB...

    I thought that the OP said that he had a DOB already. I assumed that he also had the software.
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    Well, the PIC32 MCUs are MIPS-based, but I fear...

    Well, the PIC32 MCUs are MIPS-based, but I fear losing to the ocean of ARM MCUs.
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    CopyIIPC files are sui generis; as far as I am...

    CopyIIPC files are sui generis; as far as I am aware, there exist no format interchange utilities for those.
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    There's also the real thing; the 8085-based RAIR...

    There's also the real thing; the 8085-based RAIR "Black Box", which looks a lot like a PC:

    http://www.old-computers.com/museum/photos/rair_black-box_2s.jpg

    Later models even had 8088 CPUs.
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    Sure, but is any POWER development happening? ...

    Sure, but is any POWER development happening? It's not clear to me.
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    I thought that IBM was dropping POWER from...

    I thought that IBM was dropping POWER from development.
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    Gone, pretty much...

    Gone, pretty much

    I thought they were already history when AMD64 came out. Amazing how long they've held on.

    So, that leaves us with current production of what, x86 and ARM for CPUs? (I'm...
  25. Isn't the EEPROM, the little 8 pin DIP just to...

    Isn't the EEPROM, the little 8 pin DIP just to the right of the DIP swtich? In that case, it's likely a simple serial NOVRAM chip, like the Xicor X2444. Programmable via software.

    There's this...
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