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I got quite a few boards, but surely -0degrees must have them all ;) Aren't there several revisions? At least some differ by color. The 5150s come in many versions with the different patch cables. Which one are you looking for on the 5160? Also what region / location are you?

Got MCS 4: Pro Log 900 in working order with suitcase. DM if interested. Best.

Are you looking for the unit, the card, or the cable?

Awesome materials, Hugo! I ran out of spare time, so further analysis will be postponed some days and I shall report back. Dave, I looked for the relevant Post on bank switching but did not succeed so far.

Not from this post, but I found a post where someone from UK offered to burn ROMs and DMed.

Sounds like a plan. Enjoy TV & chill :)

Well we got this far in the journey. See nothing stopping me and my cheap oscilloscope from taking measurements. Which one do we start with? The 4016 with the soft issue or the 4032 with the hard issue. I'd vote for easier one to fix if there is such a machine.

Where would page 0/1 of RAM be located on the board? Closer to the hinge or further? Or is the page spread across the DRAM chips? Also what are the multiplexers? Are these 74xxx ICs?

Ah ok, i guess i could short there but installing a button for now seems overkill. will this yield more insight? has the gggg..... screen helped for your diagnostic? voltages have been fine on the drams. i have checked about a pair of ics on each machine before. if i need to do all of them i...

How to reset? Also how to find the bad 4116s I guess?

Thanks Dave. Sounds like good news. 4016: it shows another (or maybe two) screens quickly. The photo above is the final screen. One of the screens before see here: As for the RAM config there is always alternating RAM and empty. I need to check the numbers later. 4032: i think this screen...

Progress! I am getting convinced the PETTEST4032 ROM was delivered dead to me. I put the PETTESTV04 ROM in, which is the original from you and not supposed to work in my config but I do get screen output now. In fact I have two machines 4016 and 4032 same mainboard rev with same symptoms. Now...

Thanks Hugo, that was a very good essay. I am sure more readers will find it delightful. Thank you indeed! On the PETTESTER frontier, I got my two ROMs, one with the PETTESTV04 and one with the adjusted PETTEST4032 from the other posting - both burned on a NEC D2716D Both do not cause any...

Thanks Hugo, ROM topic is hopefully covered just waiting for the mail. I'd like to pick your delicious brain and/or your reference library for soldering those old phenolic boards. I have a bunch of those, many equal machines but most with intermitted faults sometimes influenced by mechanical...

Well so now it is time to wait 2 weeks... Brexit makes the mail go pffffff....

Well, I guess since a 2716 is what I asked for: I get 16kbit or 2kbyte and the burner will just trunc the second half...

Thanks Dave & Colin, i fetched the 2 bin files. I did notice that Dave's is 2k and Colin's 4k. I assume the part above 2k is ignored anyway by the PET. For the Bitfixer, I just saw a soldering kit and no ICs... I'll just get the ROMs

@Hugo Holden actually agree on all your points. I also dislike recaps and other mutilations. I also avoid solderwork on orignal PCBs. I.E. some frequently broken tantals can be just cut off and left off in 5160 which is an insight i have from -0degrees. On a different note, I do have some...

Ok so a gent from UK can burn the ROM... (actually, why don't you have a webshop, Dave?) To avoid a useless ROM, could you please check the edit ROM number to see if the ROM will work? I have no clue about ROMs, don't even know what file type he needs... Also no assembler compiler on my machine...

PM'd Thanks