[comp.sys.hp] Upgrading HP9133D to 40 meg

den@hpfinote.HP.COM (Don Novy) (02/02/90)

  To upgrade a 9133D to a 9133L (40 Mbytes), you replace the disk mechanism
with a ST-4051 and change the jumpers. You do not need a ROM upgrade. For
rev B controller board, change the jumpers to EBCH. For rev C controller
board, change the jumpers to EBCD. The third jumper (C) flags whether the
internal floppy is present and may be different. The C setting flags that the
floppy IS present.

  I have done this on 2 9133Ds with good success. One of them died when my
scrap ST-4051 died, but that's the breaks. Spare ST-4051s are hard to find. If
you find any, please email me the specifics as I need to replace a dead one.

This information is provided solely for hackers. No liability or warranty from
HP is expressed or implied.

Don Novy
den@hpfitst2.hp.com