¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. TekScopes
  2. Messages
Single Messages Topics Expanded Polls

Re: New (to me) 7854 scope

 

I did some sleuthing online and apparently it is just the Mostek mask ROMs which
are the problem. For a 7854 it may not be a big deal because firmware images
are available but if I had an old piece of test equipment, I might pull the ROMs
anyway and back them up just in case.

On 18 Jan 2014 18:36:02 -0800, you wrote:

Are the Motorola ROMs subject to the same ROM rot problems as the notorious Mostek parts?

I have recently acquired a 7854 and it has a checksum error on power-up. I opened it up expecting to find Mostek parts but found it used Motorola parts instead. The Tek part numbers (with Motorola part numbers in brackets) are 160-0408-01 (SCM92210P), 160-0409-01 (SCM92211P), 160-0410-01 (SCM92212P) and 160-0411-01 (SCM92213P). The date codes are all mid '83.

Should I replace all these ROMs or are there other likely causes for the checksum error?

Stephen
Join [email protected] to automatically receive all group messages.