Search found 1986 matches

by steve3000
Tue Jun 11, 2019 6:33 pm
Forum: hardware
Topic: people with a A5000 iss1 and scope ?
Replies: 28
Views: 646

Re: people with a A5000 iss1 and scope ?

duikkie wrote:
Tue Jun 11, 2019 6:22 pm
the big problem is that i do not have HS and VS so no picture :(
The VIDC must be programmed by the ARM before HS/VS will appear.

I suggest your issue is before the VIDC and more likely the ARM is not reading ROM correctly, so setup of VIDC, MEMC, IOC are not occurring.
by steve3000
Fri May 31, 2019 6:19 pm
Forum: hardware
Topic: people with a A5000 iss1 and scope ?
Replies: 28
Views: 646

Re: people with a A5000 iss1 and scope ?

Turned out to be easier than I thought to locate. TRM and PCB diagrams linked from my previous postings below. The A5000 PCB diagrams are from Chris' Acorns, and include the pre-IOEB circuits on page 4 of the diagrams "Acorn_A5000TRM_MainPCBCircuitDiagram4of4.pdf" New scans of A5000 TRM (warning 61m...
by steve3000
Thu May 30, 2019 5:55 pm
Forum: hardware
Topic: people with a A5000 iss1 and scope ?
Replies: 28
Views: 646

Re: people with a A5000 iss1 and scoop ?

It is very difficult if there is no schematic of the iss1 and if the chips with label are wrong then you have real problem s There is a schematic for this PCB. There are two versions of the A5000 TRM, the first version contains the circuit diagram for the early machine, that you have. Both TRMs are...
by steve3000
Fri May 24, 2019 9:08 pm
Forum: software
Topic: Disassembler for RISCOS 3.x
Replies: 5
Views: 193

Re: Disassembler for RISCOS 3.x

I find I have a need for an ARM code disassembler for RISCOS 3.1 machines. Can anyone recommend a good one? I remember using !Dissi by BASS. Seemed to be quite advanced back then (on my 1 MiB single floppy A3000). Have fun hubersn I used this a lot bitd, great piece of software. Takes a bit of gett...
by steve3000
Thu May 23, 2019 5:19 pm
Forum: software
Topic: How to clone a 'master' disc on Archimedes
Replies: 17
Views: 392

Re: How to clone a 'master' disc on Archimedes

Tried !Rat (!Pirat) on my A5000 last night and it crashed out and wouldn't copy the Touch Window disk. Copied the program to my A3000 and it worked perfectly making a virgin 'Master' disk which then would register to my A3000. :D Ah that's great to hear, glad it worked :) Looks like you have proved...
by steve3000
Wed May 22, 2019 11:57 pm
Forum: software
Topic: How to clone a 'master' disc on Archimedes
Replies: 17
Views: 392

Re: How to clone a 'master' disc on Archimedes

This is actually quite difficult. Because, it is very easy to create a protected 'master' disc which fools RISC OS and appears to backup ok on the Archimedes, but the backup doesn't work because it misses out critical hidden data used to store registration details etc. The problem is that the RISC O...
by steve3000
Sun May 12, 2019 9:09 am
Forum: hardware
Topic: Replacement 9pin MiniDIN plugs
Replies: 3
Views: 180

Re: Replacement 9pin MiniDIN plugs

:D

You'll find the cable is very slightly thicker than the original, which makes it very slightly less flexible, but you rarely notice this in use. I've been using one like this for about 5 years - it's definitely the best solution to fix a damaged original mouse that I've seen.
by steve3000
Sun May 12, 2019 7:08 am
Forum: hardware
Topic: Replacement 9pin MiniDIN plugs
Replies: 3
Views: 180

Re: Replacement 9pin MiniDIN plugs

These have been successful in the past:

http://uk.rs-online.com/web/p/din-cable ... s/7241150/

Fits A3000 as shown here (and more info at top of this thread):

viewtopic.php?f=8&t=8659&p=94277&hilit=Mouse#p94277
by steve3000
Sat May 04, 2019 10:41 am
Forum: hardware
Topic: A3000 PSU dead?
Replies: 7
Views: 707

Re: A3000 PSU dead?

No problem. I suspect the PC111 so will get one ordered and commence replacement.

Will let you know how it goes... [-o<
by steve3000
Sat May 04, 2019 6:11 am
Forum: hardware
Topic: A3000 PSU dead?
Replies: 7
Views: 707

Re: A3000 PSU dead?

working no problem but just today did a graceful down, swapped keyboard, flick power switch and nothing... dead. Tried a multimeter on the unloaded psu spades, nothing... I've just experienced an identical A3000 PSU failure to this :cry: Working perfectly one minute, off for 30 minutes, then go to ...
by steve3000
Tue Apr 30, 2019 6:40 am
Forum: hardware
Topic: A310 restoration
Replies: 71
Views: 1451

Re: A310 restoration

When desoldering multiple pins at once, without a desolder gun, I've had some very good success recently using Chipquik alloy . Although it's marketed for SMD work, it's been great when removing thorough-hole ICs and sockets from an A3000 I've been working on (more on this soon), because the very lo...
by steve3000
Tue Apr 30, 2019 12:50 am
Forum: hardware
Topic: A310 restoration
Replies: 71
Views: 1451

Re: A310 restoration

Thanks Steve. A dual colour LED makes much more sense. And who knows maybe it IS yours?! Did you sell it onto a video enthusiast?! :lol: Ahh, I would love to think that my old A310 was being looked after somewhere... but alas not. Mum said she cleared the entire contents of the loft to the tip, whi...
by steve3000
Mon Apr 29, 2019 10:44 pm
Forum: hardware
Topic: A310 restoration
Replies: 71
Views: 1451

Re: A310 restoration

Wow! Well done finding an A310 with that rare 36MHz ARM3 and a colourcard! That is a very high spec A310, in fact very similar to the one I had BITD (long since gone) which also had the 36MHz ARM3, IFEL RAM u/g + IFEL podule backplane and ICS IDE...although I never owned a colourcard, that'd have be...
by steve3000
Sat Apr 06, 2019 7:23 am
Forum: hardware
Topic: RISC OS 4.39 FileCore Limits
Replies: 8
Views: 322

Re: RISC OS 4.39 FileCore Limits

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...
by steve3000
Fri Apr 05, 2019 8:24 pm
Forum: hardware
Topic: RISC OS 4.39 FileCore Limits
Replies: 8
Views: 322

Re: RISC OS 4.39 FileCore Limits

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...
by steve3000
Thu Apr 04, 2019 10:47 pm
Forum: wanted
Topic: USB mouse and Strong Arm processor
Replies: 1
Views: 173

Re: USB mouse and Strong Arm processor

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!
by steve3000
Sun Mar 31, 2019 7:10 pm
Forum: hardware
Topic: Hard Disk Errors
Replies: 3
Views: 261

Re: Hard Disk Errors

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 ;)
by steve3000
Sun Mar 24, 2019 1:18 am
Forum: hardware
Topic: A5000 floppy "drive empty"
Replies: 7
Views: 293

Re: A5000 floppy "drive empty"

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.
by steve3000
Sun Mar 24, 2019 1:15 am
Forum: hardware
Topic: A5000 floppy "drive empty"
Replies: 7
Views: 293

Re: A5000 floppy "drive empty"

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.
by steve3000
Sat Mar 16, 2019 6:14 pm
Forum: hardware
Topic: Another A5000
Replies: 15
Views: 406

Re: Another A5000

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 ;)
by steve3000
Sat Mar 16, 2019 5:23 pm
Forum: hardware
Topic: Another A5000
Replies: 15
Views: 406

Re: Another A5000

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 ...
by steve3000
Sat Mar 16, 2019 5:00 pm
Forum: software
Topic: A4000 + Uniboot = error "Expression is a string"
Replies: 18
Views: 505

Re: A4000 + Uniboot = error "Expression is a string"

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)
by steve3000
Wed Mar 06, 2019 8:18 am
Forum: hardware
Topic: "Arcflash" A3000/A3xx/A4xx/A5xx/A5000 in-system programmable ROM -- any interest?
Replies: 116
Views: 4739

Re: "Arcflash" A3000/A3xx/A4xx/A5xx/A5000 in-system programmable ROM -- any interest?

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?)
by steve3000
Sat Feb 23, 2019 11:19 pm
Forum: for sale / freebies
Topic: Free to collector
Replies: 18
Views: 868

Re: Free to collector

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...
by steve3000
Sat Feb 23, 2019 5:34 pm
Forum: hardware
Topic: How does RISC OS detect "native" VIDC enhancer capabilities?
Replies: 7
Views: 369

Re: How does RISC OS detect "native" VIDC enhancer capabilities?

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...
by steve3000
Sat Feb 23, 2019 8:44 am
Forum: hardware
Topic: How does RISC OS detect "native" VIDC enhancer capabilities?
Replies: 7
Views: 369

Re: How does RISC OS detect "native" VIDC enhancer capabilities?

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...
by steve3000
Sat Feb 23, 2019 8:30 am
Forum: for sale / freebies
Topic: Free to collector
Replies: 18
Views: 868

Re: Free to collector

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.
by steve3000
Fri Feb 22, 2019 8:31 pm
Forum: hardware
Topic: How does RISC OS detect "native" VIDC enhancer capabilities?
Replies: 7
Views: 369

Re: How does RISC OS detect "native" VIDC enhancer capabilities?

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...
by steve3000
Fri Feb 22, 2019 7:25 pm
Forum: for sale / freebies
Topic: Free to collector
Replies: 18
Views: 868

Re: Free to collector

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 ...
by steve3000
Wed Feb 20, 2019 9:44 pm
Forum: software
Topic: !65Host & !65Tube
Replies: 25
Views: 2361

Re: !65Host & !65Tube

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...