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8-bit acorn software: other • Re: C development for FujiNet and cc65 bbc target
@fenrock continues grinding through first pass at a ROM. bbc1.pngbbc2.pngbbc3.pngbbc4.png-Thom Statistics: Posted by tschak909 — Mon Jun 03, 2024 11:59 pm
View Article8-bit acorn hardware • Re: BBC Micro keyboard PCB
OK, I've done the resistor pack mod, so you can choose to go either way, discrete axial resistors or a SIP resistor pack (low profile) and I've moved the bypass caps away from the ICs (although I've...
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8-bit acorn software: games - high scores • Re: High Score Challenge...
Yes, indeed, thank you Ed I find these challenges are good for the brain and the co-ordination (perhaps not so good for the frustration though) routing out that Beeb keyboard and Aerial has almost got...
View Articleother vintage hardware, software and languages • Re: Retro Chip Tester...
I've found recently that the problem with the Arduino I was using to program the RCTP was that the external crystal I used for the Mega 2560 was a 50 ppm tolerance part, which although it worked...
View Article8-bit acorn software: other • Re: Testers wanted for BBC BASIC (Z80) version 5
Is there a test suite for BBC BASIC? Something like the NBS test suite for Minimal BASIC?Statistics: Posted by scruss — Tue Jun 04, 2024 1:43 am
View Articleacorn atom and acorn system series • Acorn Atom Colour Board schematic questions
I was looking through the schematic for the original Atom Colour Board. I was hoping someone might help out with a few clarifications.Having never seen an physical colour board I assume that it...
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32-bit acorn hardware • Re: Another Bush internet.tv mod thread
I wonder what carnage removing that bodge resistor would cause Probably make the modem detection intermittent (it's a Podule).Statistics: Posted by philpem — Tue Jun 04, 2024 10:55 pm
View Article32-bit acorn hardware • Re: RISC OS 3.20 ROMs?
I moved things around and being mindful of everything I changed from when it was working ok to not, checked connections and put the podules back where they were originally. Problem seemed to go away....
View Article8-bit acorn hardware • Re: Beeb with no V-Sync on 6845
Sometimes I've had untraceable shorts on pcb's and had to resort to applying isopropyl alcohol to the pcb and a low(ish) voltage/high current to the two pins and see where the alcohol evaporates to...
View Article32-bit acorn hardware • Re: Econet podule for RISCPC & A7000
Still need to produce a backplate and brackets for this, though.Are the bracket dimensions for this podule the same as the bracket dimensions for the A3010 podule? In other words, can I use this 3010...
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general • Re: JLC Component Assembly
Aha, a volunteer! That's the Dunkirk spirit, well done! 500 blank Pi Bridge boards on the way to you no doubt! Fortunately I've managed to get another batch ordered, so no need for volunteers quite...
View Article32-bit acorn hardware • Re: A5000 Repeating Key Issue / Repairs in the UK
Thank for the reply. Just checking it now.Statistics: Posted by Mari0Bother — Wed Jun 05, 2024 10:27 pm
View Article8-bit acorn software: other • Re: Using Treecopy with ROM filing system
RFS is treated as a Tape rather than a disk so tree copy wont work correctly. which is why typing CH."" will try to load and run the first program in the listSo, you'd actually need a tape to disc...
View Article8-bit acorn hardware • Re: Shimmering Teletext on BBC/Master
As you may be aware, I've just recently repaired a faulty beeb. This involved removing a significant number of ICs, including the two ICs I needed to remove as part of this little project. Details in...
View Article8-bit acorn hardware • Re: RGB to HDMI using a Pi Zero and a small CPLD
Following on from my last post, here's a couple of traces from my scope showing two different power ups, along with a successful calibration associated with each waveform.Blue trace is the 1MHz signal...
View Article32-bit acorn hardware • Re: A4000 floppy issues
I notice that none of the analogue components around this area are fitted on this machine, nor on any other photos I can find online. This is weird, because the schematic doesn't say "not fitted", and...
View Article8-bit acorn hardware • Re: Game assist cartridge [idea]
Now if the Raspberry Pi Foundation could put a nice set of serial links onto the silicon that would accept code to boot from, we could finally have our cheap Transputer...I have recently built a board...
View Article8-bit acorn hardware • Re: Who else is building a Beeb from scratch?
Delighted to say my new board is up and running! Just one minor panic at first switch on with the continuous low beep, but that turned out to be caused by a few jumpers I'd missed.Congratulations!...
View Article32-bit acorn hardware • Re: L@@K Amazing Super Rare Acorn A3005!!!!
Is there any date-code on the keyboard which would identify it as considerably later (ie. A3010 era) than the motherboard?The normal A3000 keyboard has different coloured special keys, they are much...
View Article8-bit acorn hardware • Re: Adding a Switch to Aux Power Cable
Well, technically you only need a DPST. But DPDT toggle switches are more common.With a DPDT, each output wire (one +5V and one +12V) goes to each of the centre pins. Each input wire (one +5V and one...
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