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monotech / NuXT

MicroATX Turbo XT Motherboard, with VGA, Floppy, CF, Serial
GNU General Public License v3.0
100 stars 12 forks source link

Beeping on and off and not booting up #14

Open ktoczyski opened 2 months ago

ktoczyski commented 2 months ago

Hello,

I built this project but I have a problem to run it up. Only beeping on and off, flashing BUS diode (red/green) and not booting up.

What I checked:

  1. Voltages - ok
  2. CPU (three different}
  3. CLK on FE2010A pin 19 (is 4.77MHz)
  4. CLK on CPU pin 19 (is 4.77MHz)
  5. OSC on FE2010A pin 20 (is 14.3MHz)
  6. CRYSTAL OUT on FE2010A pin 21 (is 28.6MHz)
  7. OSC on ISA SLOT pin 30 (is 14.3MHz)
  8. CLK on ISA SLOT pin 20 (is 4.77MHz)
  9. POST CODE CARD - hang on code 3b (Is there a list of codes for XT_BIOS somewhere?)

Do you have any idea or suggestion where the problem might be?