Recent content by BowmakerFox

Just realised that the willem software is designed for 64-bit systems and mine is a 32. I'm going to try recompiling it for 32, but I don't necessarily think that's the main issue.

With retrospect you did indeed, but comparing its £100+ price tag I simply cannot afford to spend that much on hardware I'll only use occasionally. I'm not too bothered by the exposed PCB - if need's be I can fabricate or print an enclosure later down the line. Ultimately, I don't mind too much...

Aha, as a matter of fact I was about to do exactly that - unsurprisingly, had some issues with it! I managed to find a windows XP machine with a parallel port (harder than you'd think in this day and age). I've installed the latest version of the willem software that I could find, hooked up the...

The unit arrived the other day and yes indeed, it seems to have a setting for the needed 25V. However, I foolishly assumed that the USB port was for data transmission! I have most certainly not abandoned this thread, but seem now to be on the "side-quest" of finding a machine that has a working...

Aha, funnily enough that's exactly the configuration I got as a "shot in the dark" second hand off a marketplace seller the other day. Should be in the post now, so I'll give it a go when it arrives. I did check its compatibility with my 27C16s and supposedly it is, according to the...

Bless you sir that's a very kind offer, but I'm in the UK and shipping would be absolutely extortionate. Nonetheless, I greatly appreciate the gesture - that sincerely is good of you. To be truthful, I think it's high time I invested in a programmer anyway, just in case any other ROMs fail in...

I should mention, I have no clue if they work, but I doubt they've come to any harm in an IC draw stuffed away in the back of a cupboard at work. Only one way to find out!

I managed to find some 2716s in the back of the cupboard, but for the life of me can't find the pinout of the edit rom anywhere online (in my machine I believe it to be a mos 901447-29 based on the schematics and where UD8 is on my board, wouldn't be surprised if I'm mistaken) so do any of these...

That seems sensible. Does the PETTEST fit into one of the empty sockets or does it replace an existing ROM, so I know which socket to search for the pinout of to check compatibility? Cheers

Oh neat, I thought the pinouts of 27 series was incompatible, glad I was wrong. I'll be back at work on Tuesday, I'll see if any of them are 2716 and will get back to you.

Alrighty, I assume that'll need some EPROMs then - do you have any advice as to which kind I should look for? Not sure if I said it earlier, but I did manage to find some 27XX EPROMs at work of various sizes but I've heard that their pinout doesn't match, so I presume they're no good. I'll need...

I just did the above, and found two sockets which weren't making dependable continuity and I didn't trust them. I replaced both sockets, alas breaking a trace in the process (I have since run a jump wire as best as I can) Now that the 901465 and 901447 are making proper contact, I fired it up...

Sorry for the massively belated response, been wildly busy at work... I just tested the continuity of the pins on every socketed IC, two of them seemed to have the odd pin that doesn't make proper contact, so I'll see if I have enough sockets to replace them and will let you know if it makes any...

In that case I'll de-ox the lot of them and continuity test them tomorrow to make sure that isn't the issue. If needs be I can replace the sockets. I'll get back to you and see if any are dodgy.

Given the above socketed ROMs, do you think it best still to look to getting some EPROM hardware or are there any other things I ought check first? Regards