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No worries Darren 8) While we're about it, this reminds me that the I2C rom isn't technically compatible with a 2P because, for the BASIC % integer variable parameter-passing, the rom directly accesses BASIC's variable storage area at $0400 so that wouldn't work with a second processor. This is actu...

It's probably my fault, these things usually are.... :lol: Is that a Model B with a 2P? It looks as if my I2C rom is being initialised twice but I don't know why, possibly something to do with the 2P..... :-k Could you try it without the 2P on and if that doesn't help, without the RamFs (Datacentre?...

Tube (External) - Random Co-Pro project use 1MHz Bus - Opus Challenger or BeebSID User Port - UPURS Printer Port - HP Thinkjet Disk Drive Port - Watford Disc Drive Sharer to various 5.25" & 3.5" drives RS423 - NC Cassette Port - Acorn Cassette Deck Econet Port - NC Analogue Port - I2C cable Interna...

Any 27128 devices should be fine to be honest, I'm still not sure what's gone awry with yours but somehow you've been unlucky, assuming it isn't yet down to a curious artefact of your programmer. Something like these reclaimed ones are always good value (note often a 12v/21v Vpp mix) - I can't see a...

Then I’d say that one can only reasonably conclude that your roms are faulty (or at least sub-standard) since the zeroes image check isolates us from any Beeb-related influence.

Have you ever used your programmer for ‘retro’ devices before? You say the settings are correct but apart from ‘Enable Beep’, I personally don’t recognise any... :) (I principally use a Dataman S4) Sometimes, older devices need more programming current than modern USB programmers can supply and I no...

Erase an eprom to blank, i.e. 16k of FF's, and then try programming the attached 16k zeroes image. 16kzeroes.rom ( btw - 27128's are fine for a Beeb etc. and as long as the physical devices are as you say and do use a 12.5v Vpp then they should program. I have seen folk experience intermittent issue...

Can you make an all-zeroes 16k image and see if you can blow that? EPROMs erase to $FF so at the blank stage, they can report as ‘good blanks’ but could actually have faulty stuck bits that cannot be driven to zero by programming. If this is the case, they are broken and cannot be used reliably.

Do you want to use a Beeb or just a Pi and Beeb Basic? If the former, search the I2C 4 U thread for ‘PWM’ and you’ll see what goodness can be achieved....

As Mark suggests, very little hardware resource is required and nothing really that is 'I2C' bespoke as such. On the I/O, I think you [ Mark ] are perhaps mixing up I2C and UPURS because my I2C implementation requires both of the two lines (SDA & SCL) to be bi-directional input-output with both need...

Thanks Stephen, I do remember now and tbh, I never did think it had much value because why on earth would you want simultaneous help info from every rom with it all just scrolling past...? :roll: So Ant, the reason UPURS doesn't respond to *HELP . is because UPURS thinks that command switch is silly...

Hello and thank-you for the feedback, always appreciated! 8) When using a *HELP . command no output is produced by the UPURS v5.1R ROM. *HELP UPURS works as expected. What is *HELP . supposed to do? I must have forgotten over the decades! :-k If no active serial port is connected by a UPURS cable to...

Another neat way would be to get an I2C-based DC motor driver module and then control the motors using the Beeb I2C rom package There are lots of such modules available, the price tends to reflect the capabilities of the specific board - this is an example of a straightforward two-motor module.... 7...

Merry Xmas and a Happy New Year to everyone!

Martin

Every shade of awesome....

Gotcha, ta

.....due to the disc image having &FA on some of the tracks / sectors :( As you well know, if UPURS can’t figure what to do with bum sectors and/or tracks when reading a source disc, it defaults to writing bytes of $FA to the image because, given I had to pick some value, I went with FA as an acron...

If your Beeb has a 177x FDC and you're handy with a soldering iron, you can build a little two chip project which will allow you to use HD 3.5" floppies which are still abundant and freely available....

Hi - thinking about it, you can probably receive and read PMs so I’ve sent you one with my email address...

Hello again - no problem on a rom and of course I can make a cable (I haven’t any ready in stock) but due to personal bandwidth, it won’t be until one evening this week so you probably wouldn’t see it until the weekend. Could a friendly admin type please enable PMs for Trevor (I assume Trevor? :) ) ...

Etid tied diet deit teid etdi.......EDIT

Just because I can

@LOOK@ Rare! No ‘last edited by....’

EDIT : And for the 8th time.....

I have tried to contact MartinB to purchase either a UPURS utilities 5.25 floppy disc or ROM, as I have no way to create one. He has not replied, so would someone on the forum be able to help me please? :shock: I have received no such contact my friend - I don’t know what comms route(s) you’ve trie...

That BASICED 'rom image' isn't a rom image - it looks like its the source code or something, possibly from github or somewhere? I can't tell how you've arrived at the file but it's just wrong! Have you selected the wrong file to download perhaps? For example here's the first few bytes..... <!DOCTYPE...

If you try both ssd's with the EELOAD utility that Ken Lowe recommended earlier in the thread (and I think you tried?), you will get a checksum after loading a given rom image and this will tell you definitively if there are differences between the alternatively sourced versions of the images.

Mark wrote:Try using the search box to find other posts / threads about this.

Or look at the post just above Mark's....

Have a look at this thread

tricky was asking for the ADVAL(0)AND3 test because that returns the state of the fire buttons and your value of 1 means that the player one fire button is permanently indicating pressed which will indeed cause games to assume this has been intentionally selected by the user. If this is occurring w...

That's very kind of you Dave and if it suits Duncan better then its fine by me, I'm in no rush whatsoever. We shall let Duncan comment.....

Thank-you and yes, those are the ones I can use. Sincerely though, if you don’t want to post (because I do recognise that it amounts to significant hassle) then no worries at all, I will happily leave them for another taker. However, if you feel that you can take an anti-histamine and bear to confro...

I try it on a regular basis but despite greasing up, I keep getting stuck in the large letter test slot.