Search found 40 matches

by quokkaz
Wed Aug 26, 2015 2:21 pm
Forum: 8-bit acorn hardware
Topic: Problem with dual floppy drives on Master 128
Replies: 26
Views: 4123

Re: Problem with dual floppy drives on Master 128

Okay, what test gear do you have? Multimeter? Logic probe? Oscilloscope? Or the very poor (wo)mans tool, a red or green LED and a resistor (470 ohms to 680 ohms) and some wires... Mark I have a multimeter or can set up wires/LEDs if required - also might invest in a logic probe. While this isn't my...
by quokkaz
Tue Aug 25, 2015 2:35 pm
Forum: 8-bit acorn hardware
Topic: Problem with dual floppy drives on Master 128
Replies: 26
Views: 4123

Re: Problem with dual floppy drives on Master 128

Thanks for all your input so far. I've had the motherboard out and it looks pretty clean underneath - no signs of damage from the battery leak but a fair bit of corrosion around some of the contacts on the top side, which I've tried to clean up. The drives are double-sided and I've had them out to c...
by quokkaz
Mon Aug 24, 2015 8:03 pm
Forum: introduce yourself
Topic: Hi from North Yorkshire
Replies: 16
Views: 2307

Re: Hi from North Yorkshire

From the photo it seems that the 4.5V battery pack was replaced with a 6V battery pack (4 x 1.5V batteries) :?: As one of the cells is different, I assumed he had used a dummy cell (wire link shaped like a "battery"). But looking again, I'm no longer sure... Mark It's a dummy cell :D
by quokkaz
Mon Aug 24, 2015 6:25 pm
Forum: 8-bit acorn hardware
Topic: Problem with dual floppy drives on Master 128
Replies: 26
Views: 4123

Re: Problem with dual floppy drives on Master 128

Disc connector looks OK. Took off the keyboard too see underneath and found a broken capacitor in the vicinity: https://s3-eu-west-1.amazonaws.com/quokkaz/bbc/motherboard-ic7.jpg Another one further away: https://s3-eu-west-1.amazonaws.com/quokkaz/bbc/motherboard-ic36.jpg Not sure how relevant they ...
by quokkaz
Sun Aug 23, 2015 8:05 pm
Forum: 8-bit acorn hardware
Topic: Problem with dual floppy drives on Master 128
Replies: 26
Views: 4123

Re: Problem with dual floppy drives on Master 128

Did you have a good look at the disc drive port on the Master? No bent pins or other possible connection problems? I assume the two different disc drives have their own cables so that an issue with the cable can be ruled out? Good point. Both had their own cables. I'll take a closer look at the con...
by quokkaz
Sun Aug 23, 2015 6:57 pm
Forum: 8-bit acorn hardware
Topic: Problem with dual floppy drives on Master 128
Replies: 26
Views: 4123

Problem with dual floppy drives on Master 128

I recently acquired a BBC Master 128 on eBay with a dual disk drive. It was sold as spares/repairs and the seller said that the last time it was used there was a bang and puff of smoke. However, it was booting up and displaying text on the monitor. Since I've had it, I've replaced the battery pack a...
by quokkaz
Sun Aug 23, 2015 6:36 pm
Forum: introduce yourself
Topic: Hi from North Yorkshire
Replies: 16
Views: 2307

Re: Hi from North Yorkshire

flaxcottage wrote:Welcome, Richard. :D
The Master is a great machine and the Psions too. Which ones do you have?
Psions:
- Organiser II LX64
- Series 3a 2mb
- Series 3a 512K
- Series 3a 512K & 1Mb (currently being merged)
- Series 5mx (with battery issues :( )
- Shortly to be joined by a Series 3
by quokkaz
Sun Aug 23, 2015 6:31 pm
Forum: introduce yourself
Topic: Hi from North Yorkshire
Replies: 16
Views: 2307

Re: Hi from North Yorkshire

Welcome Richard! I hope it works out for your BBC Master. There is an odd white platform just above the battery pack, I wonder what's under there? Already sussed that. This is what was under there: https://s3-eu-west-1.amazonaws.com/quokkaz/bbc/battery-1.jpg https://s3-eu-west-1.amazonaws.com/quokk...
by quokkaz
Sat Aug 22, 2015 12:08 pm
Forum: introduce yourself
Topic: Hi from North Yorkshire
Replies: 16
Views: 2307

Hi from North Yorkshire

Hi All I've recently started collecting examples of old computers that I've used in the past. So far this includes a ZX81 and numerous Psion organisers. I've studied and worked with computers since 1980 - mainly programming. Earlier this month I had the chance to pick up a BBC Master 128 on eBay whi...

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