Jump to content

Search the Community

Showing results for tags 'hardware specifications'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Commander X16 Forums
    • Introductions
    • X16 Discussion Lounge
    • X16 Help & Support Lounge
    • Off-topic Lounge

Categories

  • Official Software
  • Official Docs
  • Community Downloads
    • Games
    • Productivity Apps
    • Graphics Apps
    • Audio Apps
    • Demos
    • Networking Apps
    • Dev Tools
    • Tutorial Apps
    • Misc Apps

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


About Me

Found 3 results

  1. Will it be possible to detect the clock speed setting/jumpers programatically? In case I have a program that is sensitive to processor speed, I would like to automatically adjust a delay routine so that program usage is transparent to the user. If not, I suspect that most people will be using 8Mhz anyway.
  2. I looked on Mouser for an ISA slot connector. I found a whole backplane ?? for $28+. I looked other places. Briefly. I found nothing. Looking on Mouser for a PCIexpress connector, however immediately gave me this: PCI Express / PCI Connectors 98P CARD EDGE ASSM VERTICAL A 98 place socket for $0.78 quantity 1, $53.40 for 100. A common, inexpensive part. Nice. I suggest that the PCIexpress (x8) connector would be more appropriate for Commander X16, just based on availability. 98 pins may seem like a lot for an 8/16 data bus, but: The 65C816 has a 24 bit address space. For EMC and signal integrity reasons, every signal should have a return path (ground). Adding a dedicated return for every signal will make the bus much quieter. If we were to expose all 38 signal pins from the 65C816, plus the extra de-multiplexed 8 address bits, and then give every signal a ground, that leaves just four pins for Vcc. That doesn't seem all that extravagant to me. I'm not saying we should directly expose the full CPU bus, but having room to choose what we want to share is A Good Thing(tm). Any (weak) argument that this would tempt people to insert PCI express cards would also apply to ISA connectors. You can just reverse the socket or change the distance from the edge of the motherboard so a normal PCIe card would not even fit. I'm not suggesting that we support PCIexpress, just that we use the same mechanical connector because it is cheap and readily available.
  3. I want to design an expansion card, but I haven't found any schematics or other info I would need for the interface. I understand that this may not be stable right now, but I would at least like an idea of what it might eventually look like. I see four slots on the prototype motherboard. There must be a pinout somewhere.
×
×
  • Create New...

Important Information

Please review our Terms of Use