8-bit acorn hardware • Re: BBC Master 128 Startup Problem
When I started trying to fix mine, the relay would randomly chatter. IC20 seemed to be the main issue a scope probe on pin 12 made the relay go a bit mad.There were other issues, but the relay seemed...
View Article8-bit acorn hardware • Re: Drive head not moving when reading disc
Sounds like the DIR signal (pin 18 on the connector, IC80 pin3 and 8271 pin 37 inside the BBC) isn't working - not driven, broken in the cable, not received correctly in the drive.It could be the STEP...
View Article8-bit acorn hardware • Re: BBC Master keyboard and AIV SCSI issues
Does it still randomly 'type' if the keyboard is unplugged?Statistics: Posted by vexorg — Fri Mar 15, 2024 1:26 pm
View Articlecommunications • Re: Is BBSing an interest for you ? How do you do it
When it's not hosting the BBS, if I use my beeb to connect it's via serial to a rpi running tcpser. Depending on what I'm doing I'll either use Commstar, Commstar II, Termulator or Aterm. If I'm...
View Articlethe complete BBC games archive • Re: Duck! Me? - Release 3
Hi,I will get the game added over the weekend. I will ask one of the chaps at CASA to upload the map and walkthrough. Lee.Statistics: Posted by leenew — Fri Mar 15, 2024 3:27 pm
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8-bit acorn hardware • Re: Diagnostic clip
Hi MikeThe idea of an in-circuit test of logic chips has been around for over 30 years and as wiggy said has been used in PCBA production test for as long. In fact the Genrad tester is one of the...
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32-bit acorn hardware • Re: Acorn A500
It's easy enough to make an adapter, this is the one I made when imaging this machine - https://www.domesday86.com/?page_id=936IMG_20171014_145111243_HDR.jpga5000-mouse-connector.PNGI'm sure you can...
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off-topic • Re: ZD-915 Desoldering Station Improvements
Dave H.Statistics: Posted by daveejhitchins — Sat Mar 16, 2024 2:00 pm
View Article8-bit acorn hardware • Re: Series 3 ROM issue
As I said, with this modification, IC101 is intended for 32K byte SRAM chips. Because a write enable line is now being fed to IC101 pin 27, a 32K byte EPROM will not work correctly. Only half (16K...
View Article8-bit acorn hardware • Re: MMFS Development and Support
Now updated first post . . . Dave H.Thanks Dave, that looks better.Looking at the logic for one of the LOCK flags:Code: AEN = MADET & !ERNW & FCDC /* Unlock &FCDC 0/1 */ # !MADET &...
View Article8-bit acorn hardware • Re: Eprom questions from an absolute beginner
There is a YouTube channel called least significant byte which has a video on programming eproms for the BBC master which will take you through creating a new MOS eeprom. While that isn't exactly what...
View Articlenew projects and releases: text and graphic adventures • Re: The Hobbit :...
Perhaps you're running up against the maximum string length of 255 characters?Statistics: Posted by dr_d_gee — Sat Mar 16, 2024 2:46 pm
View Articleintroduce yourself • Re: Hi to you all from Raymond in Sheffield
(waves from Walkley)Statistics: Posted by jgharston — Sat Mar 16, 2024 2:52 pm
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8-bit acorn hardware • Re: Diagnostic clip
I'd imagine the arguments I'd get with the other half if I'd brought home the Teledyne TS87 that was being ditched out a company that was relocating out of St. John's Innovation Centre a few years...
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acorn atom and acorn system series • Re: Combined VGA / Tube interface board...
Thanks a lot to you all. The Atom with Combined VGA/Tube Interface board is working. It was a bad solder connection on R12 which causes no picture and as you guys already told, the D2 trace. The...
View Article8-bit acorn hardware • Re: BBC Master 128 Startup Problem
Thanks vexorg! Excuse my lack of knowledge but how would a scope provide more information than a straight forward voltage reading with a multimeter? Thank you.Statistics: Posted by Tony_S — Sun Mar...
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32-bit acorn hardware • Re: Mouse schematic / photos?
Having opened up my Archimedes' mouse, the circuity looks surprisingly straightforwardThanks! I've drawn up a schematic (attached). It should be correct.As you say, it's quite simple so while some of...
View Article8-bit acorn software: other • Re: MMFS and Pi1Mhz JIM ram disk
I've pushed my changes back to my fork, I've tidied up the code a bit, but seem to be having a few issues with stability. It should reject commands it doesn't understand, I just tried running a random...
View Articlegeneral • Re: BeebRoom 2024
Today I had so many internet problems with my PC I decided enough was enough! There's something pretty odd going on, if a device is using the internet, and taking up the whole download speed, then it...
View Articleoff-topic • Re: Scanning advice needed for A4 books
Tesseract-based solutions are "reasonably" fast — say 15 seconds for an A4 page. With the online program, you will be uploading the file to their servers and that will take time (uploading is always...
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