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Hi all, I've just created a git repository of the source to the Acorn 6809 card ROM : https://github.com/prime6809/System6809 This was created from disassembilies of the MAME copy of the 6809 card's ROM and a copy dumped from the machine at the CfCH at the recent ABUG meetup. Comments are largely ta...

Just to clarify one point about voltakes that tripped me up. VCCIO can be run at or BELOW the vcccore voltage so for a XC9572XL chip they'll need to run at 3.3V, input levels are however 5V tollerent. Output levels will however only be up to VCCIO, this hasn't generally been a problem in any of the ...

Dave, If you want my Gotek re-implementation schematic drop me an email / pm. It's similar to the published schematic but I used a 74LS07 instead of the LS04 + mosfets. Also used a pair of sil resistors as pullups. Designed to plug onto the System's floppy controller so has jumpers for drive select ...

I thought I remember someone had made the hardware and was working on the software (for an Econet server) for one of the ARM boards that seem to ba available now. Could have been one of the STM32 boards, but I could be wrong. Edit: This is what I was thinking of..... https://stardot.org.uk/forums/vi...

Yeah I should be there, it fortunately avoids Lesley's birthday the week before and my brother's wedding the week after.

Cheers.

Phill.

Hi All, Sorry, I'm crap with names, who was it that gave me a bunch of System cards at the weekend and who's 80 Col card I tested (and could not get working). Could you perhaps post a picture of either side of the 80 col board please, I suspect the reason we could not get it working is that it isn't...

Hi all, Here's the roms that we dumped at the ABUG meetup, though pernod has already posted some of these. Included : Serveral versions of the Acorn Communicator ROMS. An early (we think pre-production) version of the Electron MOS. The Mertec Companion ROM The Care Smart Cartridge ROM A couple of Sy...

Anything anyone wants me to bring along to the show, apart from the normal soldering irons eprom programmers etc?

Cheers.

Phill.

After *VDU1, text is always written to the 6845 screen and grahics to the 6847 screen. If you want text to output to 2 screens, you have to change the OSREAD and OSWRITE vectors to update 2 screens. Or of course directly write the characters to the video RAM.....handling the ASCII->6847 mapping man...

I seem to remember that you needed to type *VDU (I think) to re-direct the output to the 40x25 teletext card, the command for it is in the original 8271 DOS rom.

Cheers.

Phill.

So I've been adding the GDOS-2015 board to MAME and am curious about the Hardware test page. 0012.png I have SID connected but not detected, what is it looking for? How would it ever detect AtomDOS since the Hardware test ROM resides in the same location &E000? That version probably could not detec...

Right found it! The bug that was preventing it from working.....note to self, REPT is 8255 port c bit 6 not bit 0, so it thought the REPT key was constantly pressed....was stopping the AtoMMC CAT command working too.... Now on to the next bug why it won't load the selected program :) keeps just repo...

Actually, only the chapter selection uses JSR OsRdCh. The text part of the menu uses JSR Inkey, where Inkey is: It also uses direct access to B001 and B002 for Up (Ctrl) Down (Shift) and Rept. Do these not work either? Right thanks for that will have a look. What hardware does your STM32 emulated A...

Hi all, The Text mode menu program in the Atom software archive, how does it read the keyboard, my little STM32 emulated Atom will boot the initial graphical screen, which will let you select "A for commercial, B for modern conversions etc" using A,B,C etc. But once the text mode menu is loaded it s...

There's a TV repair shop near me in Radford Coventry that repaired our CRT TV a few years back.

FM TV Services.
189 Cheveral Ave
Radford
Coventry
CV6 3EN

Phone 024 7660 1093

Might be worth giving them a call.

Cheers.

Phill.

hoglet wrote: ↑

Thu Aug 23, 2018 9:08 am

Can you not just define your own custom version of that inline function:

Code: Select all

__STATIC_INLINE uint32_t LL_DMA_IsActiveFlag_TC1(DMA_TypeDef* DMAx)
{
  return (READ_BIT(DMAx->ISR, DMA_ISR_TCIF1) == (DMA_ISR_TCIF1));
}

Heheh that's what I did in the end.....

Cheers.

Phill.

Hi All, Doing some programming of the STM32 using GCC, and trying to make a generic macro so I can change SPI channels without having to change stuff all over the place. Anyway the STM libs define a bunch of functions to check the terminal count of the DMA channels named as such : __STATIC_INLINE ui...

It would be possible to add a subforum to the emulators forum for each system or emulator. So a subforum each for atom, beeb and electron or a subforum each for B-EM, Beebem, elkulator, electron etc. Would this be a useful addition? If so which would be the best way to do it? By system or emulator?...

I've been using these for the most part: https://www.amazon.co.uk/dp/B01GK9921C I'm really confused as to the problem you're having - I've used loads of different memory sticks and they've all been fine. :? Yeah I'm using them too on Daniel's recommendation, and not had a problem, also used Kingsto...

I notice that in the Beeb, WR on the 8271 is pulled high quite aggressively with a 150 ohm resistor. All the drives will have open collector (or open drain) outputs for WP because they are all bussed. The 150R will create a half decent edge & keep a decent current flowing down the (potentially long...

Hi all, As part of overhauling and checking my recently aquired System 5 I have come across this strange problem I had with the drives, I could read disks perfectly well (even Gotec virtual disks), but could not write to them. After a series of tests I narrowed it down to the 8271 chip on the floppy...

Hi all,

Is there an Atom speed test program that doesn't rely on the presence of the 6522?

I have a little something I need to benchmark.....

Cheers.

Phill.

daveejhitchins wrote: ↑

Tue Aug 14, 2018 8:19 am

Just to let people know: Aldi have a special-buy of a Juice brand 5000mA power bank for sale, from last Sunday, for £12.95 - half the price they are in Argus . . .

Did you mean Argos?

Cheers.

Phill.

Hi all, Does anyone happen to have a routine to test RAM on a 6502, specifically an Acorn machine, source code would be wonderfull. Background, trying to trace the source of the RAM faults on the System 5 and finding Acorn's SYSTEST program rather lacking......yes you found failed nibbles in that ra...

Cheers for the speedy reply, figured you'd have them

Are you going to be at the Cambridge meetup, if so I'll bring the CMS along with me for you to have a poke at

Cheers.

Phill.

Hi all,

Anyone know where I can get the romsets for the recently added (to MAME) Acorn System roms?

Cheers.

Phill.

Cheers ordered some of the connectors IanS linked to along with some AWG20 wire which is what the floppy cable splitter I have here uses

Cheers.

Phill.

I do likewise but I think this is the right housing: https://uk.rs-online.com/web/p/compact-power-connectors/6794732/ Yeah I normally hack old PC PSUs, but in this case the cables would need to be longer than they typically are..... That does look like the right housing, just gotta find the pins to...

Hi all, In playing around with the System 5 I seem to have damaged the floppy power cable, first noticed as it was smoking! I suspect that the insulation got damaged on the back of the cardcage and it shorted to something. Anyway does anyone know what the part numbers are of the 5.25" type floppy po...

It should be able to be shared, both the current version of AtoMMC and the Econet card only use 3 or 4 IO addresses. It's easier to move AtoMMC as we have the source code :) I did make a board that was a clone of the AtoMMC (I had Charlie's permission!) and a socket for a Master Econet module, worke...