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Just belled the connections on RP16, 1 and 2 are open circuit to the VIDC,
I’ll have to get out the magnifying glass and set of steady hands .

Dave

Thanks guys, it’s all getting a wee bit clearer, I’ll bell out the connections tomorrow. Here is what I have just now. 80F06079-B2C4-4CC5-AFDD-CF230ACD107D.jpeg 39D7B532-DD70-4A6A-BE5C-22E55D443A6C.jpeg I thought I had got away with just the CMOS/RTC, but looks like there is more to find yet. Dave

Hurrah! All credit to sirbod for the "high resistance" suggestion -- that's exactly what it was. Vcd<4> from RP16 to VIDC was 800K. A wire-strap later and the machine's alive and kicking and all well again. Amazing. ... with DRAM. But VRAM still has the weird lines issue. :( Hi there, I’m...

Success at last ...... Turned out to be a connection in the ribbon cable connector. Although it all rang out ok, the spring part inside the connector was pushed into its housing and not making contact with the ribbon 🎀.....I won’t be caught out by that old chestnut again.... :oops: Thanks Ian for yo...

Hi Steve, yes I would like a copy, haven’t managed to find an original yet.

Dave

I managed to wrangle the over flexible ribbon cable and rung out the two shift keys successfully.

So looks like I have more ringing out to do, or it may be IC4 or IC5 if I’m lucky.

Right Shift turned out to be 7 on Skt 6 and 8 on Skt 7.

Dave

Thanks Ian,

The salmon colour on the right shift key on skt.6 was throwing me off a bit....

I’ll test it out after dinner, but it looks like if the right shift is working, then the left should be too, so it looks like a track on the membrane.

Dave

Hi there, thanks for your response,

I found this link this morning it tells me it’s Pin 13 on skt6.....but what other connection do I need to test continuity, and see the membrane working or not.

Without a legend, I’m not sure what the colours mean.

Thanks Dave

Hi Folks, I have been repairing an A3000 with battery damage, I’ve changed a few ic’s repaired a couple of tracks and renewed the keyboard ribbon connectors. All seemed well, but I noticed that the left shift key was not working, all the rest, including the right hand shift key are ok. I have belled...

Thanks for the info,
Now I know, I’ll have to try and find an original copy of the disc......just for the hell of it.

Dave

Hi Folks, Does anyone remember the virus that was spread within a programme on a magazine cover disc in the 1990’s.1992 rings a bell. Was it within an Archimedes World disc. ? I got some old AW cover discs On eBay and my memory was jogged, I remember having to wait a month until the removal tool was...

Thanks for the info, my smallymouse has not arrived yet so wasn’t sure.

Dave

Hi Soviet,

Nice job, do you have a drawing of the connections between the alt keyboard and smallymouse. ?

I was thinking of trying the same upgrade.

Thanks

Dave

Thanks Kazzie...

Dave

Hi folks,

I picked up one of these on eBay, boxed but with no instructions.

Type...R1770A

Anyone have the instructions. ?



Dave

Hi All,
Thanks for the suggestions, I dusted off my pi 3b and loaded RISC Developments latest version Of Riscos.

Plugged in my usb cf adapter and could see it in riscos as another usb drive.....

Problem solved.

Thanks again.

Dave

Hi Folks,

I’m looking for photodesk by Spacetech at a reasonable price, I can’t find my discs

Thanks

Dave

Hi Folks,

I saw this modem header interface in an eBay listing today ...Can anyone tell me who sells these.

https://www.ebay.co.uk/itm/193477425690

Dave

Andy1979 wrote: ↑

Mon May 18, 2020 9:09 am

Not quite what you asked, but I can access the CF card from my A3010 in a USB card reader plugged into a Raspberry Pi running RiscOS 5 if you have access to one.

Thanks Andy I’ll dust off my pi and give it a go.

Dave

Thanks for the suggestions.

I’ll give them a go.

Dave

Hi Folks, I’ve just installed an IDE to Compact Flash interface and formatted as IDEFS via a wizzo rom. I have been loading it up slowly via the floppy drive and gotek. Is there a way to connect my cf card to my pc or an emulator to upload my apps more easily. I have ADFS Explorer which I believe ca...

Well my new A5000 arrived, I have stripped it down and thoroughly cleaned out 30 years of fluff, cleaned the keyboard. I have now repaired the leaky battery damage, two tracks were eaten up. I’ve installed a gotek I had left from another project. I received the bits for my CF card adapter, and after...

Hi folks,
I’ve recently acquired an A5000, the mouse supplied is pretty much useless, very sticky, I’ve given it a good clean etc but to no avail.

The only option I can see is to buy a £30 adapter.

Are there any other option open to me as £30 seems a bit steep.

Thanks

Dave

Thanks philpem,

I give it a try, my A5000 arrives today between 17:00 and 21:00, but the battery looks in a bad way, the photos are not clear but I’m sure I can see some fur on it, so I’m,looking out the vinegar and cotton buds.

Thanks

Dave

Hi there philpem, Do you remember which zip file was duff.... I’ve downloaded DaveH.’s roms 1 zip from the link, http://stardot.org.uk/forums/viewtopic.php?t=5388, in this link, https://stardot.org.uk/forums/viewtopic.php?f=16&t=11247 earlier in this post. which was a great font of knowledge, ha...

Yes I noticed the blank spaces, I’m just glad there is something on the other side.

There was a blurred picture of a screen showing the supervisor prompt and I thought it looked more like a 4 ....

Might be a project finding out if I can populate it.

Thanks

Dave

Hi

Thanks everyone, lots of food for thought.

I’ve sourced the parts but will wait till the A5000 arrives.

I can also get a 20 gig ide hard drive for £10 as another option if all else fails.

More fun to be had.

Thanks

Dave

Thanks for the info.

Where can I get a wizzo rom ? Can’t find a source on tinternet..

Dave

Hi, It hasn’t arrived yet, but I believe there is no additional software with it. I take it you mean an 40 pin ide Drive...can you recommend a size and type. Where can I get the interface for the CF cards, do they work as if they were ide drives.? Are they expensive... Sorry for the stupid questions...

Hi Folks,

I’ve just bought an A5000 base unit without a hard drive.

What do I need to buy to replace this, and what software do I need to format/initialise etc.

Thanks

Dave