Search found 2038 matches

by steve3000
Sat Sep 07, 2019 9:28 pm
Forum: hardware
Topic: "Arcflash" A3000/A3xx/A4xx/A5xx/A5000 in-system programmable ROM -- any interest?
Replies: 122
Views: 6458

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

Time to go write some code to handle the new reset I/O and POR output, then this one will go to steve3000 for testing. I have my computers ready and waiting :) Clearly Acorn changed the ROM wiring between the A310 and A3000, will the board work with the standard RO3 ROM carrier board in the A310, a...
by steve3000
Tue Sep 03, 2019 6:20 pm
Forum: hardware
Topic: Open source A3020 RAM
Replies: 8
Views: 301

Re: Open source A3020 RAM

I also have the Acorn RAM test ROMs, which offer a fairly rigorous cyclic RAM test... They never found an issue with the A3000 RAM, which showed up errors via large file copying. The file copying was the first think I could think of to check the RAM, I'd hope there are better options. Anyone fancy ...
by steve3000
Tue Sep 03, 2019 6:07 pm
Forum: hardware
Topic: Open source A3020 RAM
Replies: 8
Views: 301

Re: Open source A3020 RAM

As for the A5000, I'd be happy to volunteer...great excuse to find my A3020 in the loft!

I also have the Acorn RAM test ROMs, which offer a fairly rigorous cyclic RAM test...
by steve3000
Tue Sep 03, 2019 6:04 pm
Forum: hardware
Topic: Open source A5000 RAM
Replies: 7
Views: 283

Re: Open source A5000 RAM

Oh, exciting!

I'd happy to volunteer and have an 8mb A5000 so can test with/without the 8mb upgrade fitted.

I also have an old 'prototype' 1mb A5000 in the loft, but suspect your design requires 2mb on-board...or does it replace the on-board RAM completely?
by steve3000
Mon Sep 02, 2019 9:41 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

IanS wrote:
Mon Sep 02, 2019 9:30 pm
CDVDBurn - http://www.hubersn-software.com/cdvdburn.html Looks like it's still available. (I've never used it)
Oh yes, indeed...!

In which case, I suspect there's someone on here, significantly more qualified than my 20+ year faded memory, who can advise on this topic then :)
by steve3000
Mon Sep 02, 2019 9:26 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

I have confirmed that my CD-ROM drive is a read only. I do have 2 or possibly as many as 4 CD-ROM or DVD-ROM drives. I'm wondering about success of these working on the A7000+ What are people's experiences with this? Thanks again in advance...... I have no experience of DVD readers or writers on RI...
by steve3000
Mon Sep 02, 2019 9:21 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

I did get a reply from Nick when I asked him about registering. He basically said it wasn't necessary to register now. The software gives a shareware warning when loaded, but is fully functional. That's good to hear. Although I've not looked at how it performs yet, or what features it offers, but i...
by steve3000
Mon Sep 02, 2019 8:24 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

Depends on the size of your HD. In the good old times of HDs with less than 1 GiB I often used FCFS in compression mode to do a sector backup of my various drives and burned the image as the only file with CDBurn. This is much much faster than a file-by-file copying or archiving. https://www.craig-...
by steve3000
Mon Sep 02, 2019 6:10 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

...you also need to have enough space on your harddisc to create the Zip file. :)
by steve3000
Mon Sep 02, 2019 6:07 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

Assuming your CD drive is a CD writer, and you have some suitable CD writer software - then what I've done in the past is use !SparkFS to create a Zip file, and copy the contents of harddisc into the Zip, then pop it onto the CD. My 1Gb drive used to compress nicely to about 600mb, and fit on a CD (...
by steve3000
Sun Sep 01, 2019 6:43 pm
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

One other question..... What is the command/procedure to ensure a drive is bootable. That's *Opt 4,2 ...but you can see that this has already been done, as the HD catalogue reports option as "run". Have you successfully *RMREinit'd all the unplugged modules now? If so, try: *configure filesystem AD...
by steve3000
Sun Sep 01, 2019 11:54 am
Forum: hardware
Topic: Possible HD problem on A7000+
Replies: 38
Views: 458

Re: Possible HD problem on A7000+

As above - I suspect your configuration settings in CMOS RAM have been corrupted. This can happen if you run an old (Arthur or RISC OS 2 era) game without using the 'Boot floppy' option in ADFFS.

Switching on with Delete held down, will reset CMOS RAM to default and should bring the desktop back.
by steve3000
Sat Aug 31, 2019 1:54 pm
Forum: hardware
Topic: Trying again with my A3010....
Replies: 7
Views: 342

Re: Trying again with my A3010....

Main intrigue is I have my adelaide board back, was going to pop it in and see if the machine could be coaxed back to life. Do you mean the Adelaide board was removed/desoldered from the PCB? That would have been a lot of work I'm sure... I was considering removing the Adelaide from my early A3010 ...
by steve3000
Sat Aug 31, 2019 1:41 pm
Forum: hardware
Topic: Trying again with my A3010....
Replies: 7
Views: 342

Re: Trying again with my A3010....

To avoid having live mains exposed I've been feeding an external 5V power supply onto PL2 & PL4. No need for +/-12V unless you are debugging sound or serial (don't think they are used for anything else. The A3010 has +/-12V from the power supply? I always thought it was 5V only like the A3000 (whic...
by steve3000
Fri Aug 30, 2019 4:39 pm
Forum: hardware
Topic: A3010 Econet
Replies: 19
Views: 691

Re: A3010 Econet

IanS wrote:
Fri Aug 30, 2019 3:52 pm
It's amusing to me that the alternative keyboard connection has generated as much comment as the Econet module.
More information here: viewtopic.php?f=16&t=13291&p=173332#p173332
by steve3000
Fri Aug 30, 2019 12:08 am
Forum: hardware
Topic: A3010 Econet
Replies: 19
Views: 691

Re: A3010 Econet

Pins 2-17 of the mini-podule socket are identical pin-for-pin with an Econet module, so no extra wiring. (Obviously the select signal on the mini-podule connector is for podule address space). It sort of makes sense if you look at the first machine with a mini-podule connector, the A3000, and look ...
by steve3000
Thu Aug 29, 2019 8:04 pm
Forum: hardware
Topic: A3010 Econet
Replies: 19
Views: 691

Re: A3010 Econet

...but back to the topic, that's an excellent piece of work, I'd never considered trying to get econet on the A3010. Other than tapping those lines from the ARM250, is there some additional rewiring going on behind the econet board in the picture? Or are most of the connections in the correct order ...
by steve3000
Thu Aug 29, 2019 7:58 pm
Forum: hardware
Topic: A3010 Econet
Replies: 19
Views: 691

Re: A3010 Econet

You need to change one jumper to use the alternative keyboard, you can't use both at once. You also can't use the built in mouse socket when the link is changed to alternative keyboard... so you need to plug your mouse into the external keyboard rather than into the back of the A3010 (or underneath...
by steve3000
Mon Aug 26, 2019 8:47 am
Forum: hardware
Topic: Disk confusion
Replies: 28
Views: 541

Re: Disk confusion

The later ADFS interleaved both sides into a single logical disc.) ADFS can treat a whole disc as a single "volume" or "drive", but it doesn't interleave. The first 50% of sectors are on the lower side, with the second 50% of sectors on the upper side. Well ADFS did eventually interleave sides, but...
by steve3000
Sat Aug 17, 2019 3:35 pm
Forum: hardware
Topic: BBC model A rear ports cut outs
Replies: 4
Views: 196

Re: BBC model A rear ports cut outs

I think earlier model As (issue 1, 2, 3?) had the holes cut out as standard, only later issues had them covered.
by steve3000
Sat Aug 17, 2019 10:00 am
Forum: hardware
Topic: A310, Risc OS 2 with Cumana SCSI podule error
Replies: 11
Views: 254

Re: A310, Risc OS 2 with Cumana SCSI podule error

The MEMC1a is required for the A310, in order to use the Acorn AKA30 SCSI podule, which was definitely RISC OS 2 compatible. But the MEMC1a doesn't itself add any SCSI functionality. The Cumana SCSI podule may have originally been RISC OS 2 compatible, but this one has been upgraded to a later versi...
by steve3000
Fri Aug 16, 2019 11:10 pm
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

Re: RISC OS 2 8mb compatibility

There are a couple of undocumented features with bit 31 set in the Start, Initialise and Finalise Modules header fields: Bit 31 in Initialise indicates the Module is Squeezed and needs decompressing first Bit 31 in Finalise indicates the Module can't be *RMCleared Bits 31..28 in Start means it's a ...
by steve3000
Fri Aug 16, 2019 11:07 pm
Forum: hardware
Topic: A310, Risc OS 2 with Cumana SCSI podule error
Replies: 11
Views: 254

Re: A310, Risc OS 2 with Cumana SCSI podule error

If the ROM is looking for MessageTrans, then it's RISC OS 3 only.

RISC OS 2 provided Messages on disc, in !System.

...and yes, I don't recall CDFS being available on RO2.
by steve3000
Thu Aug 15, 2019 9:36 pm
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

Re: RISC OS 2 8mb compatibility

Can you extract WindowManager from 2.01 and soft-load it (pre-desktop)? I have a vague recollection that the changes to support 8MB were in the Wimp. Maybe. Great idea as definitely seems WIMP is the problem. But I only need for a few tests, so for now, I'll live with 4mb :) Ok, I couldn't resist t...
by steve3000
Thu Aug 15, 2019 9:27 pm
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

Re: RISC OS 2 8mb compatibility

steve3000 wrote:
Wed Aug 14, 2019 11:13 pm
Have only tested on emulation so far, but it boots fine to the desktop with only 4mb showing, even if 8mb+ enabled.
...and just to confirm, the 4mb limited patch works fine on real hardware :)
by steve3000
Wed Aug 14, 2019 11:15 pm
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

Re: RISC OS 2 8mb compatibility

richw wrote:
Wed Aug 14, 2019 10:03 pm
Can you extract WindowManager from 2.01 and soft-load it (pre-desktop)?

I have a vague recollection that the changes to support 8MB were in the Wimp. Maybe.
Great idea as definitely seems WIMP is the problem. But I only need for a few tests, so for now, I'll live with 4mb :)
by steve3000
Wed Aug 14, 2019 11:13 pm
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

Re: RISC OS 2 8mb compatibility

Thanks all, I've hacked away at RO2.00 and built a new version which ignores 8mb :)

Have only tested on emulation so far, but it boots fine to the desktop with only 4mb showing, even if 8mb+ enabled.

ROM attached here, along with brief details of hack.
by steve3000
Wed Aug 14, 2019 8:28 am
Forum: hardware
Topic: RISC OS 2 8mb compatibility
Replies: 13
Views: 465

RISC OS 2 8mb compatibility

For various reasons (mainly testing, games, etc), I'm building a multi-boot RISC OS system, including RISC OS 2.00. I'd like to get this working on an old Archimedes fitted with 8mb RAM, but hitting a problem. RISC OS 3 works fine with 8mb, RISC OS 2.01 also does, and Arthur 1.2 works fine also (but...
by steve3000
Tue Aug 13, 2019 11:17 pm
Forum: hardware
Topic: what's the use of Mode 0
Replies: 24
Views: 907

Re: what's the use of Mode 0

RobC wrote:
Tue Aug 13, 2019 9:36 pm
looking at the outline spec, they only said this was preferable and could be an optional extra.
Although I've not read the spec, you could argue that MODE 0 was an optional extra, since it was not present on the Model A...?
by steve3000
Fri Aug 09, 2019 1:16 pm
Forum: programming
Topic: Streaming sound from disk on a BBC Micro
Replies: 6
Views: 253

Re: Streaming sound from disk on a BBC Micro

I thought about whether streaming sampled sound would be possible back when I did my Bad Apple conversion, and although I didn't get round to writing any sound streaming code, I came to the conclusion that you would probably be able to do something interesting along these lines using a MMC/SD card i...