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Hi

I thought it might interest you to see a small soldering practice kit I've got, it has 0.5mm pitch contacts as well as 1mm pitch.
They are cheap to buy on eBay etc., you can gain some useful experience of soldering.
There's no SSOP28 included, you'd have to buy a suitable one also.

Hi Dave

Is the Risc PC still available?

Please PM me.

:shock: I’d not put WD40 anywhere near the inside of my computers... Agree it works nicely in cars, keeping out moisture from spark plugs - but this is because it coats the surface of spark plugs/ht leads/etc with a film of oil - and it removes carbon deposits by chemical action. Since the contact ...

I used IPA to thoroughly clean the legs of the LED and then some WD40 on a cotton bud to lubricate the led and the contact pad, dab the pad carefully or you'll rub away the conductive layer. WD40 improves electrical contacts, e.g. spraying on ht leads and spark plugs to keep out moisture. :shock: I...

Thanks! What did you use to clean the contact between the membrane and LEDs? I tried some IPA but didn't notice any improvement. The Caps Lock is very feint but cannot see any light from the num lock or scroll lock. Apart from the keyboard LEDs everything seems good now :) I used IPA to thoroughly ...

The card only supplies 3 configuration parameters: IDEFSBuffers and IDEFSDirCache, where I've idly experimented with all sorts of numbers, none of which make any difference (they're both on 32 at the moment), and IDFSDrive, which is 4 as one would expect. *CAT and all file operations from the comma...

Not sure what to suggest, if the test roms show a video display, then aiui risc os 2 should display something. I don't think swapping from test roms to risc os 2 should need any link changes. How confident are you in the risc os roms being all good? Can you post pictures of the roms fitted and the ...

:^o Hi I get the same screen as the one that you've posted, but it's only when I put my Slogger Pegasus into my Plus 1. I was wondering what issue pcb you have in yours, an Issue A by any chance? All Issue 4 PCB. I did try a good working ULA in it and no joy, thinking it could be the 6502 in both c...

:-s :roll: I think that the issue A Pegasus PCB may need some modifications to work, I noticed some of the data line connections on the circuit diagram are cross-connected but as I don't have much time at the moment for investigating a PCB, it'll have to wait. If the data lines are “cross-connected”...

:^o Hi I get the same screen as the one that you've posted, but it's only when I put my Slogger Pegasus into my Plus 1. I was wondering what issue pcb you have in yours, an Issue A by any chance? If your Pegasus is faulty, please return it and I'll fix. PM sent . . . . Dave H :D :D No worries Dave,...

:roll: I think that the issue A Pegasus PCB may need some modifications to work, I noticed some of the data line connections on the circuit diagram are cross-connected but as I don't have much time at the moment for investigating a PCB, it'll have to wait. Regarding the strange screen display, perha...

That's interesting, the edge connector on the Pegasus cartridge is clean but as the issue A PCBs that I've seen differ somewhat from each other I think that the arrangement and value of the capacitors on the PCB may be relevant to the particular display. I've bought the two PCBs in the middle of th...

Having experienced problems at boot up when my cartridge experiments don't respond to the bus correctly, maybe it's just the case that the edge connector on the Pegasus cartridge needs cleaning. Something to try, perhaps. :) Edit: Fixed typo. That's interesting, the edge connector on the Pegasus ca...

Hi
I get the same screen as the one that you've posted, but it's only when I put my Slogger Pegasus into my Plus 1.
I was wondering what issue pcb you have in yours, an Issue A by any chance?

:roll: The 100mA figure was overly generous, I've looked at the A3020 Welcome Guide, which I downloaded from: http://chrisacorns.computinghistory.org.uk/Computers/A3020.html and on page V the figure quoted is actually 80mA. Because the leds in the mouse operate an opto-coupler pick-up system, the ef...

Hi

Can I ask whether you made the IDE drive that you're using with the interface that you're using, with the Watford IDEUtils?

Also, have you configured an IDE drive in !Configure?

:oops: I just noticed that the current draw of a type 4 mouse is 125mA. I recall reading the technical reference manual for, I believe, A30x0 & A4000 and the manual states that the maximum current draw for a mouse should be 100mA. I suppose that it's possible that the A3020 has a beefed-up psu in co...

#-o Thanks again Philpem, it's a type 4. I'm not the original owner so I don't know anything about it and I haven't got a ball, the retaining ring or a cable for it so I've no idea if it works. I read a post about Acorn mice with failed leds a while ago, I seem to recall that the leds looked discolo...

Thanks for the info Philpem, that's useful to know.
More modern mice usually have the screws under the pads so some spares would come in useful.

Do you know what type of mouse the one in the picture is?

](*,) I've found a fix for Type 1 Acorn mice with missing 'feet', or the little plastic pads on the underside of the mouse. This also applies to Amx mice with similar parts. Without the 'feet' the mouse won't sit level but they're not the sort of thing that you can easily buy these days. I had some ...

Hi

Can you give some idea of how much usage your ARM 3 arc has had, also do you have any facts and figures relating to the power consumption of the CPU in relation to the standard ARM 2?

#-o I've so far been unable to work out the problem with the stb desktop, Chris Whytehead's instructions may prove to be more successful though. The pictures show what happens; the desktop, pushing the ok button which causes the double arrow and ctrl-S which shows the pinboard menu options. Andrew F...

:o I don't know for sure but I'd hazard a guess that because the Risc Pc wasn't 'engineered' with 128MB simm's in mind, using them is reliant upon the ability of the simm socket to deliver the necessary voltages to maintain the integrity of volatile memory. The power requirement of a 128MB simm is l...

I copied the roms using my eprom programmer, the roms are 2 x 27C322, as far as I know.

I also noticed that Peter Howkins, the author of RPCEmu, has a module database on the RPCEmu website which probably contains the RO-NC version modules.

Hi I've an IBX250 and I was able to follow Andrew Flegg's instructions (on www.bleb.org) to hack the box but unfortunately the hack, which I achieved using the RPCEmu and an A3020 to transfer file to the zip drive, didn't quite work properly because the Risc-Os NC version in my STB differs from the ...

:roll: The thing about repairing a vintage computer is that whilst your meter shows continuity when you test, when the board is powered up it might still not work properly if the signal path is degraded. The kind of beep that you get is a clue, the probes need to be cleaned with IPA and contact with...

Hi I wondered if you'd seen the 'Very Dead A3000' post re: L7->8051 connection, also beware PS/2 to Quad adapters. I bought one of the ones on eBay and although it worked for about 3-4 times, the mouse cursor froze and would only work after Power on/Delete until it's now frozen, see picture. The PIC...

Although I know nothing about the problems with the A4000 that've so far been described, the basic problem sounds to me like it may be connected with a faulty Zener diode or a component that a zener enables.

Hope of help.

Hi

The Spectrum mode makes the output level louder I'd have thought, because Spectrum load levels are significantly higher than a BBC, I've found.

BBC or Electron tapes will load ok if the tapes are ok but with tapes that aren't in good condition a tone control can help.

I've worked out how to view that page, much appreciated.