Search found 828 matches

by cmorley
Tue Apr 23, 2019 3:51 pm
Forum: software: other
Topic: Toggling binary bits
Replies: 5
Views: 111

Re: Toggling binary bits

EOR - exclusive or

Code: Select all

   10A%=&8000
   20PRINT~A%
   30B%=GET
   40A%=A% EOR 2
   50GOTO20
>
by cmorley
Tue Apr 23, 2019 3:27 pm
Forum: introduce yourself
Topic: Hello from a new A3010 owner
Replies: 9
Views: 206

Re: Hello from a new A3010 owner

Welcome!

Ahh the A3010 0.3% better than the A3000 :)
by cmorley
Tue Apr 23, 2019 3:25 pm
Forum: software: other
Topic: Accessing sideways ram from an event handler
Replies: 7
Views: 124

Re: Accessing sideways ram from an event handler

Well, that is what the stack is for!

Remove stuff until you have a minimal example which crashes and post the code. It isn't clear to me what machine you are targetting either, is it the Elk then?
by cmorley
Tue Apr 23, 2019 3:22 pm
Forum: for sale / freebies
Topic: FS: New ROM / RAM Expansion Board for BBC B
Replies: 36
Views: 1003

Re: FS: New ROM / RAM Expansion Board for BBC B

KenLowe wrote:
Tue Apr 23, 2019 3:02 pm
Running short on PCBs now, and not sure if I should order up a second batch. :-k :-k
I imagine the PCBs are not cheap so I'd take names and order more PCBs if interest got over a sensible threshold.
by cmorley
Tue Apr 23, 2019 3:20 pm
Forum: introduce yourself
Topic: A resurfaced Beeb user :-)
Replies: 10
Views: 98

Re: A resurfaced Beeb user :-)

Welcome! :)
by cmorley
Tue Apr 23, 2019 12:01 pm
Forum: software: other
Topic: Accessing sideways ram from an event handler
Replies: 7
Views: 124

Re: Accessing sideways ram from an event handler

Did you update the OS copy of the ROM page register (&F4) before changing the register?
by cmorley
Mon Apr 22, 2019 11:56 am
Forum: wanted
Topic: Wanted: DNFS ROM (and Maybe Hi-BASIC)
Replies: 8
Views: 144

Re: Wanted: DNFS ROM (and Maybe Hi-BASIC)

Daniel is correct. Loading HiBASIC from disc is a good idea. You can try with HiBASIC versions 2, 3 and 4. http://mdfs.net/Software/BBCBasic/BBC/
by cmorley
Sun Apr 21, 2019 3:22 pm
Forum: hardware
Topic: Can I use a 44 Pin DOM on a 40 pin Acorn IDE?
Replies: 2
Views: 77

Re: Can I use a 44 Pin DOM on a 40 pin Acorn IDE?

I should think so. All you need is an adapter.

Pins 1-40 are straight through. You'd need power & ground on the correct pins 41-44.

eBay is full of adapters you could hack.
by cmorley
Sat Apr 20, 2019 7:47 pm
Forum: hardware
Topic: What do I need to connect riscos4.39 to a windows workgroup for file sharing?
Replies: 18
Views: 254

Re: What do I need to connect riscos4.39 to a windows workgroup for file sharing?

I looked up the EtherLan 600 on Google. If no one knows how to reflash the chip in situ, then it wouldn't be hard to take the memory chip off & reprogram/replace it and solder it back.
by cmorley
Sat Apr 20, 2019 7:36 pm
Forum: for sale / freebies
Topic: New A3000 4MB memory
Replies: 33
Views: 2358

Re: New A3000 4MB memory

Yes no problem.
by cmorley
Sat Apr 20, 2019 2:06 pm
Forum: hardware
Topic: Gotek Floppy Drive wirting problem
Replies: 13
Views: 183

Re: Gotek Floppy Drive wirting problem

It is altering the disk image then. I see your FF.CFG has extend-image=no I have all defaults except host=acorn & index-suppression = no You could try the last 0.x version of FF too.. I used 0.15 for ages and only recently tried something newer. Did you try an SSD image which is already the full size?
by cmorley
Sat Apr 20, 2019 11:09 am
Forum: hardware
Topic: Gotek Floppy Drive wirting problem
Replies: 13
Views: 183

Re: Gotek Floppy Drive wirting problem

I specifically meant does the file written on the BBC read the same in an emulator? Is it even updating the catalogue of the disk?
by cmorley
Sat Apr 20, 2019 9:29 am
Forum: hardware
Topic: Gotek Floppy Drive wirting problem
Replies: 13
Views: 183

Re: Gotek Floppy Drive wirting problem

If you transfer the image to an emulator do you get the same contents?

Try:
*DUMP on BBC
move stick to BeebEM (other emulators are available)
mount & *DUMP on PC

This might confirm if anything is actually being written to the stick...

While you are at it try another USB stick.
by cmorley
Sat Apr 20, 2019 9:07 am
Forum: hardware
Topic: Gotek Floppy Drive wirting problem
Replies: 13
Views: 183

Re: Gotek Floppy Drive wirting problem

Try 1.2 first. That is the latest official release.

Try the alpha (not even beta) v2.6a if you want to be on the bleeding edge after you've got a known working setup, I'd say.
by cmorley
Sat Apr 20, 2019 8:15 am
Forum: hardware
Topic: Gotek Floppy Drive wirting problem
Replies: 13
Views: 183

Re: Gotek Floppy Drive wirting problem

Which FlashFloppy firmware are you running now?

The 2.x branch is the development branch and has had some regressions (including SSD/DSD autoextend it seems from 2.6a release notes).
by cmorley
Fri Apr 19, 2019 6:11 pm
Forum: for sale / freebies
Topic: Sold: Acorn Master 80186 internal copro
Replies: 1
Views: 136

Re: Sold: Acorn Master 80186 internal copro

Sorry sold elsewhere. That was quick :S
by cmorley
Fri Apr 19, 2019 3:48 pm
Forum: for sale / freebies
Topic: Sold: Acorn Master 80186 internal copro
Replies: 1
Views: 136

Sold: Acorn Master 80186 internal copro

I am having a clear out and selling my M512 copro. Board (no standoffs), manual, PC keys card and spare CPU. I do have the disks but they have signs of mould so I do not recommend you use them if you want them. IMG files are available on the internet (omniflop or Gotek). I upgraded the CPU to a 80C1...
by cmorley
Sun Apr 14, 2019 9:28 pm
Forum: for sale / freebies
Topic: New A3000 4MB memory
Replies: 33
Views: 2358

Re: New A3000 4MB memory

keropi wrote:
Sun Apr 14, 2019 4:36 pm
also interested in one, how much is shipping to Greece?
thanks!

ps. I could even settle for an unsoldered one, I can solder it my self no issues
£4.15 for Europe.

No kits, sorry just assembled boards.
by cmorley
Tue Apr 09, 2019 4:20 pm
Forum: hardware
Topic: BBC Model B with random 0 on screen
Replies: 16
Views: 391

Re: BBC Model B with random 0 on screen

Space is HEX &20
Zero is HEX &30

One bit different.

Looks like you are getting some single bit errors in the RAM if the 0s are persistent. Possibly a dodgy RAM chip or maybe IC14 perhaps?
by cmorley
Fri Apr 05, 2019 7:28 pm
Forum: hardware
Topic: Help with an A3000 newbie!
Replies: 17
Views: 731

Re: Help with an A3000 newbie!

OK. I need to fit my new mud flaps to my 90. I bet the rusty chocolate bolts LR use will snap off. :(
by cmorley
Wed Apr 03, 2019 6:00 pm
Forum: hardware
Topic: Model B running v-e-r-y slowly
Replies: 13
Views: 353

Re: Model B running v-e-r-y slowly

Yes you are getting constant interrupts from something. You need to start removing things which connect to the IRQ line. I'd take out the user VIA first (IC59 I think). Then if it is still bad remove the system VIA IC3 and put the chip that was in IC59 into there (or the machine won't boot properly)...
by cmorley
Wed Apr 03, 2019 5:26 pm
Forum: hardware
Topic: Model B running v-e-r-y slowly
Replies: 13
Views: 353

Re: Model B running v-e-r-y slowly

Yes check the IRQ pin on the CPU (pin 4) & see if it is stuck low.
by cmorley
Tue Apr 02, 2019 10:06 am
Forum: hardware
Topic: Beeb 1MHz Bus FPGA Adaptor
Replies: 63
Views: 1750

Re: Beeb 1MHz Bus FPGA Adaptor

In my experience TSOP style packages are fine to hand solder if the footprint is ~1mm wider than the package. So 0.4mm each side will be fine.
by cmorley
Sun Mar 31, 2019 7:44 am
Forum: hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 300
Views: 20161

Re: Proposed: "The Ultimate Electron Upgrade"

What I fid annoying about FPGA is the number of documents you need to scour to find out the information you need. Like this gem which isn't in the datasheet but in the "Intel® MAX® 10 FPGA Configuration User Guide" m10flash.png Edit: I solved the problem by writing a read UFM->RAM verilog module whi...
by cmorley
Sun Mar 31, 2019 7:36 am
Forum: off-topic
Topic: Atari 2600
Replies: 27
Views: 535

Re: Atari 2600

It is the only other machine I have seriously considered writing for. Xevious is a great example , its hard to believe that it is essentially 40 fat pixels of background plus two bytes and one bit of gfx. Is that impressive or is it just poor that the latest Firefox is using 8 processes and 1GB of ...
by cmorley
Thu Mar 28, 2019 4:59 pm
Forum: hardware
Topic: Help with an A3000 newbie!
Replies: 17
Views: 731

Re: Help with an A3000 newbie!

I have some spare EPROMs I think... I ordered 10 from China and only used 4 in my A3000 so I am 99% sure I have 6 left.

I did a 4MB RAM upgrade for the A3000 still got boards left from batch 2. :)
viewtopic.php?f=16&t=15572
by cmorley
Thu Mar 28, 2019 2:36 pm
Forum: hardware
Topic: Help with an A3000 newbie!
Replies: 17
Views: 731

Re: Help with an A3000 newbie!

Good work :)

Another machine back from the brink. They are quite usable with 4MB RAM and an IDE interface.

I blew some EPROMs to upgrade mine to Risc OS 3.11 too.
by cmorley
Tue Mar 26, 2019 4:32 pm
Forum: software
Topic: Copying Apps from CD (ISO) to HDD
Replies: 15
Views: 472

Re: Copying Apps from CD (ISO) to HDD

RPCemu is probably worth a shot. https://www.4corn.co.uk/articles/rpcemu371win/

One of the current maintainers is member flibble on this forum.
by cmorley
Tue Mar 26, 2019 6:57 am
Forum: hardware
Topic: MMFS Development and Support
Replies: 770
Views: 52853

Re: MMFS Development and Support

The ROM has 0.A3 on which is what I got with the issue 4 Turbo MMC. So I imagine it is compatible with SmartSPI and MMFS.
by cmorley
Mon Mar 25, 2019 11:51 am
Forum: hardware
Topic: Beeb 1MHz Bus FPGA Adaptor
Replies: 63
Views: 1750

Re: Beeb 1MHz Bus FPGA Adaptor

J-leads are a pain to solder on any package.

That's why I stopped using the PLCC EEPROMs on my boards & changed to a TSOP package instead. Even using a stencil, paste and hot air I had to manually fix 2-3 of the connections per package.