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8-bit acorn hardware • Re: Internal Goteks
I have the Olivetti PC128S branded version, I miss the fancy function red keys! Grazie Enzo!And I also have an unmodified PC128S, which came all the way from Castelli Calepio in Italy! Statistics:...
View Article8-bit acorn software: other • Re: DFS 2.45 ROM layout
I tidied up my disassembly enough that it can go on GitHub: https://github.com/tom-seddon/acorn_dfs ... isassemblyThe build process produces two outputs.First is the original ROM. 16 KBytes, identical...
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32-bit acorn hardware • Re: A5000 boot issue
And I’ve learnt some basic diagnostic skills out of this too. While I couldn’t find the fault, learning to follow schematics and Ian’s instructions was interesting and fun.That's always a big...
View Article8-bit acorn software: other • Re: Master MOS disassembly
After poking around a bit more, I've got a couple of updates to the addresses in https://mdfs.net/Info/Comp/BBC/SROMs/MegaROM.htm that I'm fairly confident about.ROM bank 9 (DFS):$8000 - $aeff : DFS...
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8-bit acorn hardware • Re: Primes ROM/RAM Board Plus 3 Install and No ROMs on...
It looks like you might be onto something regarding the PSU being "weak".I have exactly your setup but with a proper Plus 3 21V AC PSU (aka massive buzzing black box). I also have a 19V DC PSU which I...
View Article32-bit acorn hardware • Re: A5000 Gone for good? :0
Has anyone maybe got any pointers on what to look at first? I do have an oscilloscope to work with.I was trying to find the board schematics also, but not able to find any?Connect keyboard. Hold/wedge...
View Articleacorn & bbc micro user group (abug) events • Re: Booking thread: ABUG...
It's up a spiral staircase with no lift?I?!Statistics: Posted by BeebMaster — Thu Jan 25, 2024 11:14 pm
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introduce yourself • Re: happy haloween!
Welcome Did you just go on a drunken forum rampage, necroposting in anything that looked remotely like a "Hi, I'm new here" thread? Statistics: Posted by Cybershark — Thu Jan 25, 2024 11:47 pm
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8-bit acorn hardware • Re: Viglen BBC B - first impressions
I do like "price includes coiled cable"! Er, thanks guys, for including that essential component for free... Edit: I shouldn't mock, because I've just figured out what this means:The very first ad for...
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8-bit acorn hardware • Re: BBC crashing randomly but works fine 30 minutes...
This is something most of us have been through where we think we sorted it. These machines can be notoriously difficult to diagnose with this sort of problem on It. Could be corrupted memory causing a...
View Article8-bit acorn software: other • Re: CP/M z80 2nd processor terminal codes
With the exception of those mentioned above, the codes should be the same VDU codes that are used when there is no Z80 second processor, i.e. the ones for which there is a table in the back of both...
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32-bit acorn hardware • Re: Acorn RiscPC SA - Vertical Scanlines & Some...
I don't think the pins will survive if they need to be taken out during a motherboard swap... Replacements are easily and cheaply made Statistics: Posted by IanJeffray — Sat Jan 27, 2024 1:44 am
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8-bit acorn hardware • Re: ADJI Testing and Results
I've been poking at the ROM code a bit... main new feature is that you can use *JKEYS with key names so you can do something like "*JKEYS 1 : / Z X RETURN SHIFT O &150" and it'll do what you...
View Article8-bit acorn hardware • Re: BBC b ram duff or not???
Thanks Paul for the help and link..I’d kind of got to IC60 but couldn’t see the link between that and the fact that the ram faults occur in 64 byte blocks, so 64 bytes in error, 64 bytes ok, 64 in...
View Article8-bit acorn hardware • Re: One of my beebs...
IIRC the one I had came with a bit of paper explaining that this board must be used to synchronise the video output of the micro to the camera to prevent rolling and flicker. It didn't mix video it...
View Article8-bit acorn hardware • Re: Faulty Cassette Port - not loading
The signal missing at IC35 pin#2 means one of the transistors is dead. Remove both transistors and check the output again at pin #2.Statistics: Posted by maniacminer — Sun Jan 28, 2024 1:53 am
View Article32-bit acorn software: classic games • Re: Untouched high score file request...
Does anyone have an untouched high score file (or image of a new and unused disk set) for Cataclysm by David Postlethwaite?This would be on disk 2, I think it's the "acdata" file in the Run directory....
View Article32-bit acorn hardware • Re: PiEconetBridge and A3000 copy errors
I hope you're all having fun up in Manchester. Sorry I had to pull out.It's been mostly working but intermittently failing this evening. I do see "Performing ADLC chip reset" in the syslog file which...
View Article8-bit acorn software: other • Re: Full list of Master MOS versions
Mask ROMs In 1978 Intel charged $1000 Mask fee, and a minimum order of 100 units for an 8k ROM (~$10). By 1986 that Mask fee had risen to $3000 and min units to 1000.From here.It's not so much the...
View Article8-bit acorn hardware • Re: Who else is building a Beeb from scratch?
Okey its like this mostly i look at the legs. Longer is positief + short -Thats for most parts.En de diodes have a mark like a wite line or black line. so you cant mis .R8 is wrong way around.Black...
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