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Do you specifically want a Solidisk RTC board or are you just assuming that’s the only way to a Beeb RTC? In case it’s just the generic RTC capability you’re after, you can add one very cheaply using I2C. Clicky here if interested.....

That should be fine as long as BASIC is ‘off’ and not being used. Can you temporarily load the data somewhere else, say &0900-&0AFF or higher up in memory (but below screen mem) to see if it is a location problem?

Dave wrote:Can you work out what the C (and also the E) stand for now ... boyo?

Chinese and Emakhuwa ?


(I can’t believe how difficult it is to find a language other than English that begins with ‘E’...... )

For eprom blowing - no idea of the differences between the versions.

Just added more, maybe the ‘E’ versions are Electron?

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Sounds fascinating Stephen, keep us posted! :) One minor point, I have subsequently discovered that because the MOS obviously shares the same system 6522 lines as I have used for my I2C, if you mess with keyboard during certain I2C accesses, you can corrupt a transfer. I can’t ‘break’ anything as su...

I guessed so because I’ve had that particular feature forever - back in the day and now, it’s still an essential on all my floppy drive pairs. It’s particularly useful for 35/525 combo units because I tend to use 35s for everyday stuff due to their robustness but still have lots of bootable 525s kno...

And for an extra twist, could you break out the line which selects which one would be drive 0 and which one would be drive 1 ? I could be wrong, but I took that as a metaphorical ‘twist’ and that 8271 just wants those wires broken-out to facilitate the fitting of an id changeover switch to allow ei...

Well done Roland (and Dave)! That tweak could well have fixed other games - Dave mentioned Freefall for example (did you try that too btw Roland?), but unless one individually and ‘scientifically’ failure-analyses every non-working game, extending the ‘working’ list of games can just amount to a bul...

Looks fine to me Roland but I’ll let Dave (Hoglet) comment and have the say because he’s offered to do some more testing and tweaking so I’m best not to interfere!

Dave wrote:BTW, I'm happy to investigate other cases of specific games not working with UPCFS.

That’s perfect Dave!

I’ll just sit back and watch then if that’s ok unless you have any questions but the code is well-commented and, being me, there’s nothing fancy

Anyway, assuming it was to be unconditional, in the routine ‘ starload ’ as attached, prior to the highlighted line where the Block Flag Byte is being tested for last block, the bottom bit of this same byte ($03CA) should be tested and if set, i.e. file ‘Locked’, make $0258 = 3 as Dave suggests. 032...

So, the incompatibility here should be easy to fix in UPCFS - it just needs to test the locked block flag, and set &0258 to &03 accordingly. I can see how/where to do it in the code - unless a lengthy test was carried out to specifically detect Arcadians being loaded, this change would set ...

You are very kind sir but as you know, your engagement with the project was one of my great motivators for seeing it to the finish and, with your own protection tweaks, you’ve achieved some incredible results =D> It’s still all I’ve ever used - real floppies and UPURS, what else could a person stuck...

Thanks Dave, good work! =D> You’re more than welcome to play with UPCFS, the source is posted further up. I kind of ran out of steam and wanted to switch to a full FS rom so that it’s compatibility wasn’t limited by all the sneaky vector stealing but as is often the case, I guess I just ran out of h...

No worries Dave, you are most welcome! 8) You should bob down to Obscurity one day Dave, I’ll show you around the place. It’s fairly quiet and you’ll be completely ignored but if you can draw energy from your inner smug, you’ll be just fine. The main advantage though, because there’s nobody else her...

Martin B is selling some kit for this.

He is?

No worries Roland, it's my own fault - I decided many years ago not to post code on here anymore because its always too stressful but, a simple delay sounded seductively easy so I dropped my guard.... #-o :lol: (That's also the reason why you have to ask to see any of my project sources Roland, I'll...

A pause between messages in a text adventure doesn’t require millisecond accuracy and as I specifically said in my post, I was suggesting code that was hardware agnostic other than an assumtption of CPU clock speed. I also explicitly pointed out that for different processor clock speeds, you can var...

No worries - you could also add a vdelay label at the STA wcount [/i] and then for variable delays, just perform LDA #nn , JSR vdelay in your main code to get variable delays. So if 6 is about right for 1 second, doing LDA #60 , JSR vdelay for example would give you a 10s delay if you wanted such fl...

From some of my code, I /think/ the lower delay routine of 256 X by 256 Y is about 0.16s at 2MHz so at bigwait , setting wcount to 6 as shown would give about a second but you can easily have a play with that specific number and see what you get. Note that as it stands, it trashes all the registers ...

Found this Stephen, see bottom left.....

Looks perhaps more like a scope threshold triggering issue? I would have expected a simple varying frequency trace to be stable and fixed at the left but slightly 'stretching' and 'contracting' on the right?

I realise you were hoping for the quick answer but I was thinking perhaps you could buzz out the pin connections knowing the interface chip and Ian has posted the pinout. If no answer is forthcoming, you can perhaps do that.

Ah, ok Stephen. Is there another chip on there besides the 3-digit display? The latter modules don’t normally have I2C built-in.

Hi Stephen - I don’t know if the Micro-Gotek that I have uses the same bits and pieces but in the picture below, Blue is SDA, Green is SCL, Yellow is Vcc and Orange is GND and those are top to bottom on the display module. 497A84C5-C78F-4949-97FF-77C62B8B7928.jpeg By the way Stephen, if you’re messi...

Dave wrote:Getting UPURS working (again) is a background task....

No worries at all Dave - I’ve watched a lot of floppy disc dramas unfold over the years and mostly, I just keep quiet but just thought I’d mention it in case you’re struggling

With UPURS, you can make (or duplicate) the Torch CPN discs in a matter of minutes......

If you haven't already done so, are you able to try just one of the 3.5" drives connected to the Beeb with no other drive on the cable? I'm just wondering about possible termination issues. (You will need to stay with DFS 1.22 though.)

flaxcottage wrote:In order to get 3.5" disks working you could try a modified DFS with the 8271; it may or may not work.

DFS 1.22 that he's tried is the 3.5" patched version.