*** M E M O R U M ***

Hi Peter,

As Mark says, “welcome”!

If you are interested in running MEMU on a Raspberry Pi, check out Bill Brendling’s “bare metal” implementation here
http://www.primrosebank.net/computers/m ... EMU_ds.htm

Regards
Dave

Hi,

the questions aren't stupid, it just helps to know that you have followed earlier advice, including checking for shorts at the locations mentioned

regards
Dave

It's obviously been a year since you read Mark's post a couple of entries above this post.

Mark gave you some tips there on the -5V question, are you sure that the -V (-12V) line is OK?

The video RAM is the only user of -5VDC

regards
Dave

cdoty wrote: ↑

04 Jul 2020 09:57

Owning an MTX is definitely an adventure.

Your adventure is about the get substantially better - USPS willing

Yes, it has a user mod to allow the 56 column CP/M ROM or the SDX ROM to be selected using the switch on the side.

A bit clunky but it works as guess

Regards
Dave

Martin A wrote: ↑

11 Feb 2020 00:03

So, is anyone else ready to take up the challenge ?

Almost

It’s on somewhat lengthy “to-do” list!

Bill,

I can send you a known working 7128S if you like, that would eliminate a locked out jtag port problem

Regards
Dave

Bill,

are you sure of the CPLDs? Some of the ones that I got from Lez had the JTAG ports locked out, if that is the problem, there is no way to reset them without an Altera Master Programmer - which are unobtanium these days.

If you are using Quartus, what is the error code/message?

regards
Dave

AD724JR SOP-16, £1.44 from China in singles, less for 5 or 10 pieces

regards
Dave

Well, not everyone