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Presumably you’re talking Elk and this style of AP3? E03A860F-CF7E-4834-99B6-E97CBF6F5F3B.jpeg Assuming yes, Pin 1 is nearest the outer edge of the cartridge module, so under the ‘ACP’ of the yellow label on mine in the photo. On yours, you should just be able to make out a small arrow (triangle) mo...

This webpage has maze generators in various (most in fact) languages. Specifically, there’s a version for BBC Basic for Windows and one for Qbasic so I’m pretty sure you’ll get what you want here.

Apparently formatting but failing to verify at Track 0 smacks very much of PC (MS-DOS) pre-formatted HD discs. If they are the latter, to have any chance at all, the discs would require bulk erasing but even then, you have an incompatible media anyway for DD use. (There is though a Beeb mod to allow...

Fine by me Derek, you go for it my friend

.....searching around this topic led me back to this very forum and Martin B's I2C ROM! He very kindly sent me the discontinued user port version, but sadly it wouldn't communicate with the dongle. I haven't got onto trying to set the clock, I may have to pull out the setting-the-time code from the...

You should be able to figure the specs from these, not identical but perfectly fit-for-purpose.... Front : https://cpc.farnell.com/duratool/stpp110zp/screws-self-tapping-pozi-1x10/dp/FN01802?ost=FN01802 Rear : https://cpc.farnell.com/duratool/stpp28zp/screws-self-tapping-pozi-2x8/dp/FN01799?ost=FN01...

Dave - I think he was asking for the spec such as 'M' number, length etc. so he can buy them locally but without any to start with, he doesn't know what to look for.

Ooh, if you still have any originals, is it possible you could image them using discbeast in case you have software (or variants) that aren't currently in the archive that Chris is assembling? Hi Dave - highly unlikely in the foreseeable I’m afraid, I just don’t have the bandwidth at the moment. I ...

This is actually incredibly common - I have imaged countless retail discs over the years using UPURS and the latter has an option to ignore the DFS file structure and unconditionally image all tracks and sectors on a given surface. Indeed, the UPURS manual recommends the use of this option by defaul...

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What’s that art package you’re using it with Derek?

Just photographed the User Port plug on mine and from that and I see....

Red:1 , Orange:2 , Blue:4 , Grey :5 , Black:6 , Brown:8 , White:10 , Yellow:12 , Green:14

Have you seen this project ? With just a few wires and a rom, a Beeb can harness the power of I2C and, as you will doubtless know, this is quite a popular protocol in the robot and control world. Someone recently loaned me an I2C robot arm that he usually controls with some pretty complex and expens...

The snips below are from the KAM manual and you can determine from these that with reference to the KAM 25-way connector, it receives data into pin 2, transmits data out from pin 3, expects an RTS input into pin 4 and pushes out a CTS signal from pin 5. With that info, it’s a breeze! On the Beeb, Da...

You should see the work MartinB originally did for UPURS and then Dave (hoglet)'s updates. To bit-bang the User Port at 115,200 baud you only have 8.68us per bit, on average! And part of that is spent at 1Mhz 'cos of slow-bus access.... Thank-you Stephen, you are very kind sir! 8) I’m certainly no ...

I actually first did that animation back when we were looking for a new design but then realised that you only wanted a static logo. I re-animated it the other day when I saw your promo video coz you know me, very old school and like to keep my retro stuff as simple as the innocent time it represent...

Happy days Dave....

Great stuff Dave

However, if it were me, I'd have done this......





Just sayin'.....

There were many Mode 7 games that used intelligent interleaving of the array of SAA5050 TT chequerboard graphics characters to produce pseudo pixel-resolution games and they were pretty good IMHO. (Unless I'm misunderstanding the discussion....?)

e.g. Arcade Invaders by Acornsoft.....

It's not a stupid question by any means and I understand your thinking perfectly 8) However..... whilst it is entirely possible, I wrote the whole package as a rom from the outset and as such, it would be no small job to extract the core protocol routines and re-wrap them in a memory-based program -...

I'm guessing after a cursory look but in line 333, you've got double brackets.... 333bts%=?pltsc%+((offx%*8)) ...which don't do anything above single brackets. So, bts% becomes equal to the contents of pltsc% with offx% x 8 subsequently added to those contents. Did you actually want.... 333bts%=?(pl...

I've run an early version of MartinB's test code and.... Any reason for using an 'early version' ? If you use the latest one from the post here , it will actually tell you which ram chip (by Beeb IC number) was at fault at the time of the test failure. It's occurred to me that the &55/'U' patte...

On Beeb temperatures, have a read of this short thread.

Duncan wrote:Now I have the bug....

For everyday transient use during all manner of Acorn tinkering, I use a Casio FP-40 thermal re-chargeable mini-printer with the optional parallel interface module and for longer ‘keeps’ stuff, I use a HP Thinkjet 2225D which has a serial interface. My Casio is shown below with some example printing...

If you do still have problems, you might like to try hard-wiring the write-enable pin of the AT28C256 to read-only because I have had issues with these chips where, in certain Beebs, at switch-on they can momentarily enter a noise-induced write state where no permanent corruption occurs but the chip...

Nurse!! Ken’s out of bed again....!

Wow, I didn't expect this to be so hard :( It isn't normally :) Quite simply, all your difficulty is down to your top3000 not being fit for purpose in the context of progamming legacy devices and as I alluded to previously, you are clearly not alone. I can program these and similar devices in a mat...

You say you "...put the delay down..." but if it is a delay issue, then it will actually need to be going up. Try a much bigger figure, this will slow down the burn but maybe give us a clue....

In the top3000 installation area of the PC, can you find a text file that has content similar to the below.....? #EPROM-AMD EPR AMD Am2716-12.7V,P27 1 EPR AMD Am2716-21V ,P27 2 EPR AMD Am2716-25V ,P27 3 EPR AMD Am2732-12.7V,P27 4 EPR AMD Am2732-21V ,P27 5 EPR AMD Am2732-25V ,P27 6 EPR AMD Am2764-21V...