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Lovely! I'll get that installed later on. Haven't had a chance to play too much as was working today, but hopefully tomorrow I'll get to grips with the basics.

Dave

Hi,

Thanks - and I had already downloaded that but I was looking for a .ROM filename - so completely missed VNULA.

Thanks,

Dave

I couldn't see this mentioned elsewhere so apologies if I've missed it. Does anyone have a copy of the VideoNuLA ROM as an image that I can load into a sideways board such as the IFEL board? I have had a bit of a Google and a search around here but if it's there, I can't see it. Also had a look in B...

Ah yes, that's one of the recommended books I believe. I'm still waiting for the one I ordered to arrive (Learning Micro-Prolog) - it's the one I used in Uni and got on with it as I recall. But, it was an Atari ST that got me through uni and that had way more memory. Right now I'm using the Sinclair...

One of my Christmas projects has been to get to grips with Acornsoft's micro-Prolog and I'm slowly making headway. But I've now hit an issue that I'm pretty sure is implementation-specifc and I was hoping that someone might be able to give me some insight. One of the exercises in the book I'm follow...

Hi Rob,

Not sure if I should reply here to be put on "the list" or send a PM - so I did both

Thanks,

Dave

So, some EPROM/EEPROMS arrived today from China - a set of 27C128 and of 28C256 and, thanks to all the help I received here, I've managed to program my first EPROM - Acornsoft COMAL. The first 28C256 didn't work and it looks like a dodgy pin on the IC. The second also failed. Well, the *H. shows the...

Thanks all. I have the PLCC adapter and some 28F020s on order so I can give it a go. But, from the way it's all strung together with critical support code stuck in nooks and crannies, it might not be the wholesale change I walked into this looking for. Still, I suppose it's very much a case of fight...

So, I can build the image bit-by-bit as Gerald suggests with the software I have. Back in business! Never thought of doing that #-o . Hi Gerald, sorry I meant that I didn't think I had the software to allow me to do it, not that I was doubting what you had told me. My comment was more to do with me...

Ah, so the Master I have has the RetroClinic CF "hard drive" and a RPi Co-Pro, so I guess ADFS and Terminal have to stay. Looking at that layout posted above, under MOS 3.5 (which I think is the generally recommended one?) whilst View is a 16K chunk, Viewsheet is 10 bytes under 16K. I thin...

Oh, hold that thought!
So, I can build the image bit-by-bit as Gerald suggests with the software I have. Back in business!

Any ideas of on a reliable source of the PLCC 28F020 gratefully accepted.

So, I now have an attachment on order for my EPROM programmer that will allow me to program my own DualOS EEPROM. The next 'challenge' is finding a source of suitable EEPROMs. The one on the DualOS is a Flash TN28F020 which appears to be (1) a 2 Mbit chip and (2) only available from Chinese sellers ...

Hi,

Mark's got too much on to really help so the idea of your program sounds very appealing. Is it relatively easy to use? I'll still need to sort out someone to burn the EEPROM for me, but at least I'd be a step closer.

Thanks,

Dave

Thanks - I guess it makes sense that it's really just making sure that the 'ROM' images are aligned to the right addresses. As I don;t have the ability to burn the ROM myself, I might drop Mark an email and see if he;d be willing to do a custom one for me - he'll have all the images (as he burned th...

Oh, that's really useful, thanks!

Already sounds like it isn't a simple software delete, but at least it can be done. Shame my miniPro EPROM box didn't come with the add-ons for different chip factors - they did have kits for that but I thought I wouldn't need them. Doh!

HI, Now I've managed to get the Master's Astec PSU recapped and can use it without worrying, I'm looking around at what bits it has in it. I knew from the auction that it had the RetroClinic CF adapter and Mark's DualOS ROM as well. After having used the IEFT Sideways ROM/RAM board in my model B I l...

And me.

Thanks Daniel - I discovered to new things today - my PSU is 'special' and how to attach photos (admittedly blindingly obvious to everyone but me!) Mother always said I was a slow boy

Hi Mark,

Ah, I wondered what the big electrolytics were.

So, following your guidance above, it has to the the 220uF (C101) on the daughterboard - there aren't any on the main board, other than the secondary side.

Thanks,

Dave

Here you go.

Oh seriously? It was that easy? Thanks, I've been after that for ages! Let me get the photo sorted.

I'd love to, but it seems to want a web site link. Is there a hosting site people recommend?

C1 and C2 definitely look like Rifas although one is a more modern Suntan yellow-cased one - the other is the classic light brown with clear case type. Haven'y spoken to Mark as I haven't received the caps yet and his instruction might say replace C<insert some other number than 9 here>. It's just t...

Hi, I've picked up a Master 128 recently and am looking at the PSU to recap it. I have a kit on order from RetroClinic - the three capacitor version - and as I'm expecting it any day now, I thought I'd have a look to see how different it is to a Beeb. I seem to have fallen at the first hurdle though...

Can only echo the above comments. Impressed with the packaging - cellophane wrap, then thin foam sheet, then decent-sized edge protectors, then a cardboard shipping box and then(!) a waterproof shipping envelope. I wonder if they wrap Christmas presents too :D Book has a decent weight and pages are ...

Hi Mark I've that a couple of times and it'll need another couple of goes to absorb the information - fantastic stuff. Very clever to start with ones and only write zeroes, although still trying to get my head around how UV resets everything to one again. I feel a Google coming on. I'm going to be o...

Thanks - that definitely enough to be getting on with. The concern I have about the OTP variety is that, being new at this, I'm going to have a high attrition rate to start off and so it'll get expensive quickly, plus I'm going to be doing a lot of program/erase/repeat to get used to it. But, at lea...

Hi, I didn't want to divert away from Brett's discussion about the Beebug programmer build he's working on, but I have a question quite tightly related to that. So, apologies in advance if it feels like it's recently been covered. I'm looking to take a less homebrew approach to burning EPROMs/EEPROM...

Hi fuzzel

Just downloaded and got it on the Gotek. It didn't load at first but then I remembered the RPi co-pro was on so disabled that and it works a treat. Many thanks for doing this. I won't have a proper chance to make a start until Sunday, but having a bit of a look around at the moment.

Dave

Hi fuzzel,

Oh that's super - and very appreciated. I doubt I'll come close to Canalboy's score but I'm willing to give it a go!

Thanks,

Dave