Welcome, Guest. Please login or register.

Author Topic: Fitting FPU to Apollo 1230 Mk2 - reboot loop :(  (Read 1999 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline TCMSLPTopic starter

  • Sr. Member
  • ****
  • Join Date: Sep 2008
  • Posts: 301
    • Show all replies
    • http://www.coherer.net
Fitting FPU to Apollo 1230 Mk2 - reboot loop :(
« on: December 13, 2011, 12:41:11 PM »
Hi All,

I have an old Apollo 1230 Mk II, no SCSI, single SIMM slot fitted with 32Mb, a 50Mhz 68030 and a Mach 210.

The board has a PLCC socket for a 68882FN FPU.  I've bought a suitable FPU (68882FN40A - I don't believe a 50Mhz part was ever available?) from amibay and fitted this in the correct orientation.

The result?  Power on and the machine sits in a reboot loop with the power/filter LED cycling between dim/bright.

Should I have to do anything else?  Would a dead FPU cause the behaviour?  Is this likely to be due to overclocking the 40MHz FPU to 50MHz?  Anything else I can try?

I've now removed the FPU and the machine is again booting as normal.

I'm really hoping I've not wasted £20 on a dead FPU.  This is after wasting £25 on a 33MHz FPU I somehow bid on mistakenly believing it to be a 40MHz part.  At this rate I may as well have put the money towards a 68040 card ... :(


Steve
A1200 50MHz 68030 16Mb, PCMCIA Ethernet, Indivision AGA MkIIcr
http://www.coherer.net Coherer: Electro!
 

Offline TCMSLPTopic starter

  • Sr. Member
  • ****
  • Join Date: Sep 2008
  • Posts: 301
    • Show all replies
    • http://www.coherer.net
Re: Fitting FPU to Apollo 1230 Mk2 - reboot loop :(
« Reply #1 on: December 13, 2011, 02:29:54 PM »
I've tried several times, mostly the machine just refuses to boot.  A couple of times it's booted but SysInfo doesn't show any FPU present (I figured the FPU wasn't seated properly).
A1200 50MHz 68030 16Mb, PCMCIA Ethernet, Indivision AGA MkIIcr
http://www.coherer.net Coherer: Electro!