CF30050

[Gary C]

Does anyone have a spare BBC Master I/O controller CF 30050 ?

Need on to resurrect a sick master 128.

Thanks.

 

[OceaneEmmerich]

Does anyone have a spare BBC Master I/O controller CF 30050 ?

Need on to resurrect a sick master 128.

Thanks. Solitaired

If you can't find the right CF 30050, you can use a retro hardware clone such as GoSDC, Datacentre, or Compact Flash adapters for the BBC Master.

 

[Gary C]

How would that work ?

The I/O chip does all the individual chip selects to things like the video processor, the via's etc so while the CPU is running, nothing is coming in or out.

 

[jltursan]

Hard to find!. CJE is out of stock ,right?

 

[Gary C]

Hard to find!. CJE is out of stock ,right?

Yep

 

[Gary C]

Found one on stardot from a very nice person who had bought one but didn't need it and sold it at cost

Had found another fault in that IC21 had obviously removed from an (unsocketed) issue 1 board and there was a solder bridge between pin 11 and pin 10 meaning the CPU ready line was held high all the time but even with that sorted it didn't quite work.

New I/O IC fitted and greeted with 'this is not a language'

Result

Just need to add a battery and make up a speaker/rom slot piece in the printer and that's master number 2 up and running.