Search found 1143 matches

by IanS
Thu Apr 02, 2020 6:10 pm
Forum: acorn atom and system
Topic: Coding question
Replies: 13
Views: 247

Re: Coding question

tricky wrote:
Thu Apr 02, 2020 5:23 pm
Did you try something like:

Code: Select all

for p=0 to 3 step 3
{Opt p
RTS
}
I only use beebasm, so appologies if my syntax is off.
Note the forum it's in, this is an Atom question. No OPT on the Atom.
by IanS
Thu Apr 02, 2020 4:19 pm
Forum: acorn atom and system
Topic: Coding question
Replies: 13
Views: 247

Re: Coding question

Can you post a small example, it's difficult to help further without a bit more info.
by IanS
Wed Apr 01, 2020 9:38 pm
Forum: acorn atom and system
Topic: Coding question
Replies: 13
Views: 247

Re: Coding question

Does this thread help - viewtopic.php?f=2&t=18695

Check the section on "Two-Pass Assemply" in the Atomic Theory & Practise" 23.7 on page 172.

viewtopic.php?f=32&t=6370

Note that DIM P(-1) is defined each time round the loop.
by IanS
Wed Apr 01, 2020 4:46 pm
Forum: acorn atom and system
Topic: Atom just acquired not working
Replies: 13
Views: 231

Re: Atom just acquired not working

John Ferguson wrote:
Wed Apr 01, 2020 4:10 pm
Memory chips 32 to 37 have been fitted. Pressing break does nothing and nothing from control g afterwards.

Photo of board enclosed. Thanks for the responses.

JohnDC112451-E4B3-4960-9FEC-0ECEF173489B.jpeg
The video ram should be filled from the other side.
From the Atom TRM
atom_video.PNG
by IanS
Wed Apr 01, 2020 3:54 pm
Forum: acorn atom and system
Topic: Atom just acquired not working
Replies: 13
Views: 231

Re: Atom just acquired not working

John Ferguson wrote:
Wed Apr 01, 2020 3:17 pm
Only half the display memory chips are present.
Which half? My guess is that the wrong half has been fitted/removed. It looks like the top half of the screen has no ram fitted, but the bottom half does.

Got any pictures of the motherboard?
by IanS
Fri Mar 27, 2020 11:42 pm
Forum: hardware
Topic: A3010: how to image/copy HDD to CF/SD drive?
Replies: 6
Views: 209

Re: A3010: how to image/copy HDD to CF/SD drive?

(and unfortunately, I didn't fully realise beforehand that Econet wasn't an option with the A3010 - got this one since it didn't have battery damage) Econet is possible, but it's a little fiddly. You need to pick up 3 signals that aren't on the podule connector, two are only available on the ARM250...
by IanS
Thu Mar 26, 2020 12:46 pm
Forum: software
Topic: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes
Replies: 12
Views: 445

Re: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes

Page 29
incl.PNG
This should be - INCL “<Projects$eg1>.AsM.IO”
by IanS
Thu Mar 26, 2020 11:47 am
Forum: software
Topic: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes
Replies: 12
Views: 445

Re: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes

daveejhitchins wrote:
Thu Mar 26, 2020 11:10 am
No, sorry, I didn't realise there were more that you'd shown :oops:
Sorry, I should have made it clearer. I'd been editing my original post as I found any issues, but seemed easier to just upload an annotated file.
by IanS
Thu Mar 26, 2020 8:58 am
Forum: software
Topic: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes
Replies: 12
Views: 445

Re: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes

zero.PNG
this should be "...the <> indicate..."
by IanS
Thu Mar 26, 2020 8:54 am
Forum: software
Topic: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes
Replies: 12
Views: 445

Re: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes

Doesn't look like you downloaded my verion with issues highlighted.

e.g.
equ.PNG
by IanS
Wed Mar 25, 2020 5:21 pm
Forum: software
Topic: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes
Replies: 12
Views: 445

Re: Cross-32 : A Universal Cross Assembler for the Acorn Archimedes

shit.PNG "further information" section page 2 bit further down the page- riscos.PNG "O" and "0" (second one is a zero character). This appears in a few places. See page 4 also. page 4 pc.PNG hop.PNG This should be HOF. page 5 die.PNG page 8 oxff.PNG Am I being too picky? I've highlighted the issues...
by IanS
Tue Mar 24, 2020 10:49 pm
Forum: hardware
Topic: A3000 power on test check error
Replies: 47
Views: 1559

Re: A3000 power on test check error

jpagen wrote:
Tue Mar 24, 2020 10:19 pm
Just tried the RAM Test ROMS-here is a screenshot-
...
Does anyone have any suggestions?
Looks like D16-D19 are being read incorrectly, That corresponds to IC24. Check the connections to all the pins and trace the data pins back to the ARM via R50,R115,R116,R117.
by IanS
Sat Mar 21, 2020 5:01 pm
Forum: for sale / freebies
Topic: Clear out of IC's
Replies: 12
Views: 447

Re: Clear out of IC's

sP1d3r wrote:
Sat Mar 21, 2020 4:22 pm
:?: Hi
Any idea what the dip-20 chips with Acorn product codes are?
Probably programmable chips (GAL/PAL). Could be the original chips taken out by a MEMC1a upgrade etc.
by IanS
Sat Mar 14, 2020 8:21 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 612

Re: ROM IC24 Acorn Atom #A000-#AFFF

Can yo7 send me a link to the Rom image and how did you load it into the EPROM. I am trying to do the same thing but I think my only method will be to load it via a .wav file that I need to create from the rom image I guess it came from the Atom Archive - https://stardot.org.uk/forums/viewtopic.php...
by IanS
Sat Mar 14, 2020 2:32 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Booking Thread - May 15-17th 2020
Replies: 35
Views: 1248

Re: ABUG Cambridge Booking Thread - May 15-17th 2020

jbnbeeb wrote:
Sat Mar 07, 2020 10:24 am
If you wish to attend, please post in this thread clearly stating the days you would like to attend on, if you want a full table to yourself, half a table or not bringing kit (aka a "No-Kitter" :) ).
Saturday only, no kit please.
by IanS
Sat Mar 14, 2020 1:22 pm
Forum: software
Topic: Upgrading RISC OS 3.70
Replies: 12
Views: 609

Re: Upgrading RISC OS 3.70

BeebMaster wrote:
Sat Mar 14, 2020 10:37 am
I discovered the other day that the Advanced Level 4 server won't even extend beyond 77 files, so it's less advanced than Level 2!!!!!
Even with this option?
l4-settings.PNG
by IanS
Sat Mar 07, 2020 11:08 pm
Forum: software
Topic: ADFS_DiscOp vs XADFS_DiscOp
Replies: 2
Views: 263

Re: ADFS_DiscOp vs XADFS_DiscOp

The state of the X bit determines how RISC OS deals with a SWI error. It is sometimes useful for RISC OS to deal with an error, while other times it is best if your own program deals with an error. An error-returning SWI can be specified by two different methods: Add the value &20000 to the SWI num...
by IanS
Sat Mar 07, 2020 8:40 pm
Forum: hardware
Topic: What cable do I need for my new cassette recorder?
Replies: 7
Views: 251

Re: What cable do I need for my new cassette recorder?

jhodgski wrote:
Sat Mar 07, 2020 8:17 pm
...the 7-pin DIN of my tape recorder...
The tape end will be 5-pin only. The beeb end is 7-pin. The Tape player is unlikely to support motor control when using the DIN connector.
It hopefully goes without saying that a 7-pin plug won't fit in a 5-pin socket.
by IanS
Fri Mar 06, 2020 11:45 pm
Forum: hardware
Topic: Gotek with FlashFloppy on Archimedes A310
Replies: 2
Views: 178

Re: Gotek with FlashFloppy on Archimedes A310

It's a 180degree rotation. Stick the connector on the cable the other way around, or use an unpolarised connector.
by IanS
Wed Mar 04, 2020 10:31 pm
Forum: software
Topic: RISC iX - Cloned!
Replies: 187
Views: 24866

Re: RISC iX - Cloned!

SteveBagley wrote:
Wed Mar 04, 2020 12:39 pm
Think I've found what the problem is -- it doesn't seem to like booting RISCiX if automatic monitor detection is turned on.
Nice find. That's very non-obvious.
by IanS
Sat Feb 29, 2020 5:07 pm
Forum: off-topic
Topic: Not HDMI or DP as I know it
Replies: 10
Views: 457

Re: Not HDMI or DP as I know it

by IanS
Wed Feb 26, 2020 8:42 am
Forum: hardware
Topic: Acorn AKA20 We32206 Floating Point Co-Processor
Replies: 25
Views: 605

Re: Acorn AKA20 We32206 Floating Point Co-Processor

I had once seen that the backplane connector on an A3xx motherboard only has the outer rows connected, so more is needed than just an A4xx backplane. The middle row are shown on the circuit diagram - http://chrisacorns.computinghistory.org.uk/docs/Acorn/Manuals/Acorn_A300_SM.pdf. Maybe they didn't ...
by IanS
Tue Feb 25, 2020 7:47 pm
Forum: hardware
Topic: Disc Error 20/21/23 and SATA->IDE support
Replies: 51
Views: 4677

Re: Disc Error 20/21/23 and SATA->IDE support

It would be way easier if I've burned a 27c800 EPROM that fixes the issue but it looks like there is none available, or am I missing something? Is this for the 5th Column rom socket? It will take a 28-pin eprom with the link set correctly. Has anyone produced a 5th column rom image for patch on an ...
by IanS
Tue Feb 25, 2020 7:43 pm
Forum: hardware
Topic: Acorn AKA20 We32206 Floating Point Co-Processor
Replies: 25
Views: 605

Re: Acorn AKA20 We32206 Floating Point Co-Processor

... In which machines would it work? Officially R140 A400 only. It relies on the middle row of pins on the backplane connector for the full 32-bit data bus, which was only on the A4xx backplanes. Middle row of pins on the motherboard were used for power on the A540/A5000, so won't work on them. Wit...
by IanS
Mon Feb 24, 2020 8:56 am
Forum: for sale / freebies
Topic: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)
Replies: 40
Views: 3515

Re: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)

j6wbs wrote:
Mon Feb 24, 2020 12:31 am
I would like to buy one of these podules and the formatted storage for my recently resurrected A3020, I cannot PM yet either, hope you still have some left,
PM sent with email contact details.
by IanS
Sun Feb 23, 2020 9:55 pm
Forum: upcoming and recent events & exhibitions
Topic: BBC B meeting Glasgow
Replies: 13
Views: 357

Re: BBC B meeting Glasgow

Poll needs a few more options. I'd probably go if it was a weekend event, but not for a day/evening (too far).
by IanS
Sun Feb 23, 2020 1:56 pm
Forum: hardware
Topic: A3000 power on test check error
Replies: 47
Views: 1559

Re: A3000 power on test check error

Tills wrote:
Sat Feb 22, 2020 6:17 pm
Without battery-backed power the CMOS chip is in a virgin state every time it loses power (in that sense of the word reset, i.e. a blank slate).
Memory doesn't work like that. It will have random contents each time power is applied.
by IanS
Sat Feb 22, 2020 12:25 am
Forum: hardware
Topic: A3000 power on test check error
Replies: 47
Views: 1559

Re: A3000 power on test check error

If there's no battery there is no need to reset the CMOS, as it will always be reset without power. Please explain how that works. How does it get reset? The RAM could power up with random values each time it is powered on if there is no battery fitted. Without a battery a Delete power on is the on...
by IanS
Fri Feb 21, 2020 10:03 pm
Forum: hardware
Topic: Acorn A540 Restoration
Replies: 7
Views: 296

Re: Acorn A540 Restoration

Without a battery / keyboard (del) will I get supervisor like on and A3000 ??? Del held at power-on should get you the desktop. A3000 is the same. If you get the supervisor, you probably didn't hold DEL long enough. You can't hold DEL too early or for too long. If in doubt hold it down. Without a b...