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Type: Posts; User: kgober

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  1. Replies
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    186

    In the last couple of days I've filled the gaps...

    In the last couple of days I've filled the gaps in the CBMDOS support, added basic support for Unix v5 file systems, and I've started work on Files-11 (aka ODS-1) volumes.

    The Unix v5 support will...
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    I can't say how common it might have been, but...

    I can't say how common it might have been, but the documentation indicates it's possible.
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    186

    Sorry about leaving Files11.cs out, it was empty...

    Sorry about leaving Files11.cs out, it was empty so I figured I could leave it out. I forgot it would still be listed in the project file.

    It's a command-line program so it should be easily moved...
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    Utility for reading RT-11 disk images

    Some months back, someone on reddit needed assistance recovering data from an RT-11 RL02 cartridge they had accidentally clobbered. I happened to have a program that could read RT-11 disk images and...
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    188

    Which documentation are you looking at? I...

    Which documentation are you looking at? I suspect that it is only accounting for the RL01. The documentation I'm looking at says the total capacity is up to 40MB, and implies that RL01 and RL02...
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    It looks like something wrong with horizontal...

    It looks like something wrong with horizontal sync. Are you sure you fitted the new connector properly, including the HSYNC pin?
  7. There are sites that have boot floppy images...

    There are sites that have boot floppy images available for download. What I would do in this situation is to set up some kind of PC emulator and have it boot from a diskette image. Using the...
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    423

    Are you sure you have 19 .smi files? My copy of...

    Are you sure you have 19 .smi files? My copy of the System 7.5.3 download has 1 "smi.bin" file (numbered 1), plus 18 "part.bin" files (numbered 2 through 18). The instructions that accompanied it...
  9. did you try swapping keyboards with the working...

    did you try swapping keyboards with the working VT320? maybe it transmits fine but the keyboard subsystem is faulty?

    or did you verify no transmit by sending the VT320 an escape sequence it would...
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    My guess is this is some kind of high speed...

    My guess is this is some kind of high speed communications card, something above and beyond the run-of-the-mill 9600 baud RS-232 your typical PC async card could manage at that time. It might be...
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    the modern luggable is a laptop, just one on the...

    the modern luggable is a laptop, just one on the high end of the size/weight scale. "portable workstation" is one of the names used for these larger high-power laptops. I have a Dell Precision...
  12. Thread: vt420 gripes

    by kgober
    Replies
    13
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    1,088

    It's possible the VT420 might send ^S and ^Q when...

    It's possible the VT420 might send ^S and ^Q when in PC TERM mode (in that mode it uses 0x65 and 0x67 for XON/XOFF), but I don't know if PC TERM mode will work without a PC keyboard attached, and...
  13. Thread: Adaptec 2742W

    by kgober
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    21
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    730

    They were ok at it for a while: 1510 - ISA bus...

    They were ok at it for a while:
    1510 - ISA bus PIO controller (no BIOS)
    1520/1522 - ISA bus PIO controller without/with FDC
    1540/1542 - ISA bus DMA controller without/with FDC
    1640 - MCA bus DMA...
  14. Thread: vt420 gripes

    by kgober
    Replies
    13
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    1,088

    Actually it might not work because according to...

    Actually it might not work because according to page 78 of the reference manual (http://manx-docs.org/collections/mds-199909/cd3/term/vt420rm2.pdf), The Ctrl+Q and Ctrl+S key combinations only send...
  15. Thread: vt420 gripes

    by kgober
    Replies
    13
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    1,088

    1. yes, see page 81:...

    1. yes, see page 81: http://bitsavers.org/pdf/dec/terminal/vt420/EK-VT420-UG-001_Installing_and_Using_The_VT420_Video_Terminal_Nov89.pdf

    2. I suppose such a thing would be possible, I don't know...
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    If you had to pick just one, I think 5 and five...

    If you had to pick just one, I think 5 and five would be most widely useful, covering C64 (both old and new), Atari 8-bit (including XE/XL) and TI-99/4A, with each system using a slightly different...
  17. I think the RP01/RP02 (with the RP10 controller...

    I think the RP01/RP02 (with the RP10 controller for the PDP-10) came out in 1969 (possibly earlier) based on the 1969 copyright date on this document:...
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    The DB-25 connector was very heavily used and...

    The DB-25 connector was very heavily used and therefore was available at a good price, and many computer makers had a good supply of them already. So it wasn't terribly uncommon to find them being...
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    iirc, PS/2 systems also used the SIMM Presence...

    iirc, PS/2 systems also used the SIMM Presence Detect pins to identify the module type, and to make things worse different models used the same PD codes to mean different things. As a result,...
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    First guess: shorted capacitor causing excessive...

    First guess: shorted capacitor causing excessive current draw, which in turns draws down the power supply voltage causing other nearby components to fail.
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    If you can get the data converted from hex format...

    If you can get the data converted from hex format to a binary image, you may be able to use DEBUG to load and save. I'm not certain whether any of the N, L or W commands are specific to a particular...
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    Somewhat related, here's a youtube video of...

    Somewhat related, here's a youtube video of someone doing something similar, minus the ROM image transfer over USB:
    https://www.youtube.com/watch?v=K88pgWhEb1M

    The result is less useful, but the...
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    The PC looks more like an AT clone rather than an...

    The PC looks more like an AT clone rather than an XT. Sys Req key on the keyboard, keylock on the front, and only the far-right-side drive bay accessible externally (AT-style).
  24. This (and what I see in the text file) looks a...

    This (and what I see in the text file) looks a lot like a bad card or a bad transceiver. Bits are getting flipped. the 192 octet differs from 128 by exactly 64 (1 bit). Likewise, 168 differs from...
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    Yeah, thinking further the empty ROM sockets...

    Yeah, thinking further the empty ROM sockets probably wouldn't be a problem. The MEMCS16 line might be, but as long as you are using a 16-bit EMS card it should be ok.
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