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Type: Posts; User: stephen_usher

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  1. You don't need a keyboard if you have a machine...

    You don't need a keyboard if you have a machine you can connect to the serial port and have a terminal emulator.

    The issue is that by default the PROM will run in diagnostic mode, which is why...
  2. Unfortunately the 3/60 is very different in this...

    Unfortunately the 3/60 is very different in this way to the 3/80.

    The 3/60 is a three year older machine which uses a lot of discrete components, doesn't have DMA, uses a 68020 with proprietary...
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    Are these TGX cards? If so you may need a newer...

    Are these TGX cards? If so you may need a newer version of the PROM to support them.
  4. By the way, here's a high-res image of the Sun...

    By the way, here's a high-res image of the Sun 3/80 motherboard. The "decode1" chip is in the bottom right above the large VLSI "reset" chip.

    http://www.lingula.org.uk/~steve/share/sun3-80-mb.jpg
  5. The Sun 3/60 and Sun 3/80 are very different in...

    The Sun 3/60 and Sun 3/80 are very different in many ways.

    The 3/60 uses a 68020 with a proprietary MMU. It's also made of a lot of discrete logic. "decode1" is just a PAL and has only 4 address...
  6. Sun 3/80: Bad "decode1" chip: Need system schematics or at least pinout.

    I've a Sun 3/80 which whilst in storage developed a fault in the decode1 chip meaning that it can't output the /RD signal to the serial SCC. Given that this is required at an early stage in the boot...
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