stardot.org.uk

could it be the partitioning software you're using was written pre-RO3.6? The software I have for the podule is version 2.23 dated 11-Feb 2004. I suspect it's "young enough" to support >4GB partitions... At least I think it should... Ah that should be fine then. I've rummaged through my boxes and f...

I don't think 4 GiB was ever a limit anywhere, apart from the advised maximum in PRM Vol5a for "big disc" filecore. Sounds more like a problem with the Power-tec formatter/firmware. I am not sure what the largest SCSI disc was I ever attached to a Power-tec podule - I switched to IDE around the 4 G...

Ioerror wrote: ↑

Thu Apr 04, 2019 6:51 pm

I’m also looking for a usb alternative to the ball mouse, are the smally mouse ones on eBay worth the £40?

Yes. They're great, fit discretely to the back of computer, plug in your favourite WiFi usb mouse, and enjoy no wires!

I think the verify command should map out any defects found. *Verify will find and list the bad sectors, but will not map them out. Once you have a list, use *Defect to map them out one at a time... ...if your list is too long to do this easily by hand, it's probably time to replace the drive ;)

danielj wrote: ↑

Sat Mar 23, 2019 9:24 pm

RPC drive should be fine

This is correct, providing it is the original drive, as the HD floppy drives Acorn used in RPCs (even the later ones) were compatible with Arcs that had the HD floppy controller.

danielj wrote: ↑

Sat Mar 23, 2019 9:24 pm

...(as should a high density PC one)

Don't assume this, PC HD floppy drives almost always need modification to work correctly on any Archimedes before RPC700. IIRC on the A5000 the main issues when fitting a PC drive, are the disc change and density select signals.

IanS wrote: ↑

Sat Mar 16, 2019 5:46 pm

rogerjhs wrote: ↑

Sat Mar 16, 2019 4:58 pm

Holding 'Del' or 'R' when switching on goes to Supervisor prompt.

Are you holding it long enough, you should see a red border on the screen.
Keep it held until the RISC OS banner appears. You can't hold it too long.

And start holding it well before switching on

Those values indicate that you have a leaking CMOS RAM battery, which has corroded your A5000's PCB, and may have damaged the CMOS RAM/clock chip. The HDD itself is probably fine, but the computer is being destroyed by the leaking battery. If you want to save the computer, you'll need to open it up ...

Uniboot can become confused if your machine is anything other than completely standard.

Do you have any podules fitted? (Some network cards cause problems)

Or do you have any modules unplugged? (Try *unplug to see)

This looks really good!

Is there a way for software to force a reset once ROM set is selected? (somehow force MEMC to page ROM in at 0x0000000 and branch to 0?)

Steve, I presume that a copy of the Arthur 1.20 ROMs is already available? Yes, v1.2 is the 'usual' version of Arthur you find lying around - the earlier versions were, I understand, on EPROM and part of the upgrade to v1.2 requirement was to return the original EPROMs. Arthur v1.2 (and v0.3 I thin...

So the question was: how to enhance the core so that multiple clocks could be provided and correctly selected by RISC OS 3? Which also leads to the question, how much docs for IOEB are available, to provide a full implementation of A5000-style hardware. Well the best place to look is at the 'simple...

It took me ages to tune the ranges to use with Steves code and I ended up writing a BASIC application which used the swi's in AutoVIDC 2 to test clock detection on my older Arc's and my A5000. The a5000 took a real hammering as I was running it 24/7 for a couple of weeks switching modes and detecti...

Thanks Jon - I've downloaded and tested, and can confirm those are byte-for-byte identical to Arthur 1.2 ROMs (well the first 64kb of each), and includes the version string "Arthur 1.20 (25 Sep 1987)".

And yes - they should be 128kb each, so you only have half the code dumped, as expected.

I am wondering how RISC OS 2.01 and later detect the presence of multiple selectable VIDC clocks on A540/A5000/A3010/A3020/A4000/A4 hardware Short answer, RISC OS doesn't detect at all... RISC OS 2.01 onwards basically just sets a latch, which on later hardware switches the VIDC clock source, but h...

They appear to be Arthur 1.1 copyright Acorn 1987. Interesting, I've not seen Arthur v1.1... v0.3 and v1.2 are the commonly available versions, I wonder if v1.1 is a misprint and they are really v1.2... They're probably 128kb ROMs (assuming Arthur was 512kb?). But if you can read 64kb max, give it ...

I have a vague memory of Steve putting a working copy of 6502Em on one of my machines at the London show. I'm sure he was running games with it as well, so it can't be far off from a release. That was about 2015 I think :? Yes that would have been my work-in-progress update of Mike's original... Sa...

I know I original tested QTM under Arthur using Arculator release version of Arculator v0.99. Must have got it on there using a disc image... seem to recall the issue with needing to use D format.

The floppy disc picture on start-up is a strange RISC OS 3 feature and rarely seen. As I recall from previous discussion, it is not a "boot from floppy" request as such, but rather a request to insert a disc containing local MessageTrans file for the language set in the CMOS RAM, where that language...

myelin wrote: ↑

Tue Feb 12, 2019 7:05 am

The bootloader works!

I can now turn on my A3000, see the bootloader come up and initialize the keyboard and display, hit 1-7 to select a 2MB flash bank, hit RESET, and be in my selected OS

Wow, that's excellent news! Well done!

Oh excellent! Thanks for this.

I posted last November about the rather unusual RAVEN 20 shadow RAM board I found in amongst some empty boxes from previous purchases, in the Today I received thread here.
I've been asked if I can share the ROM and Manual, so here they are

This does the business: http://playuef.8bitkick.cc

IMG_20190202_211426.jpg So any ideas? :? I have exactly the same mitsubishi drives in my dual disc drive monitor plinth and suffered similar issue. When I bought the plinth, about 5 years ago, one drive was described as faulty and it would not read or write to any discs successfully, while the othe...

IanS wrote: ↑

Sat Feb 02, 2019 11:31 am

steve3000 wrote: ↑

Sat Feb 02, 2019 7:50 am

...and there is now the alternative ZIDEFS which is compatible with the interface, although I'm not sure it includes CDFS?

ZIDEFS is not compatible with any 8-bit ICS cards.

ZIDEFS does not support CDFS (afaik)

Ah ok, only the 16bit ICS cards then...!

On the underside of the card on the ROM chip it says: (C) 1993 ICS LTD IDE3V5 3V06 A CD drive should work fine as slave, if your version of IDEFS includes CDFS driver software. And if not, it should just be a case of updating your IDEFS ROM with a later version of the ICS IDE software..they went up...

IOC is only ever driven at 8MHz on Archimedes hardware. I used the IOC timer T1 in RasterMan to accurately trigger interrupt at completion of each scanline, and the code works fine without adjustment on all the pre-RiscPC Arcs.

Welcome TeeBuoy!

Brilliant progress! I've sent you a PM.

Definitely looks like one of the nicest A310 4mb plug-in solutions I've seen. The Watford plug-in 4mb which I have for my current A310 involves two boards connected by IDC cable in a similar way to 8mb upgrades, and is quite fiddly to fit. As Ian says, most 4mb upgrades for the A310 required a lot o...