Search found 2086 matches

by RobC
Thu Apr 19, 2018 10:18 pm
Forum: for sale / freebies
Topic: IDE podules - 8 and 16 bit versions
Replies: 15
Views: 159

Re: IDE podules - 8 and 16 bit versions

I'd like one of the minipodule versions if still available please.

I've got a stand at Wakefield on Saturday so will be around all day...
by RobC
Thu Apr 19, 2018 6:14 pm
Forum: software
Topic: HELP! Copied over my !Boot files when installing OmniBoot
Replies: 2
Views: 67

Re: HELP! Copied over my !Boot files when installing OmniBoot

If you can get to the desktop and have a way of getting files onto the machine (e.g. CD-ROM), then the files you need should be here.
by RobC
Thu Apr 19, 2018 5:39 pm
Forum: software: classic games
Topic: Green Beret
Replies: 5
Views: 191

Re: Green Beret

You could change every colour in that game to black, and it'd be no less playable. Yeah, it's dreadful :D In looking for a clue about the weapons, I came across an Acorn User review that called it one of the worst games ever on the Beeb! The Micro User was far more positive :shock: EDIT: Should hav...
by RobC
Thu Apr 19, 2018 12:06 pm
Forum: software: classic games
Topic: Green Beret
Replies: 5
Views: 191

Green Beret

I was playing with creating a new colour scheme for Green Beret last night because our eldest has suddenly become fascinated with my VIdeoNuLA boards and wanted to have a go at improving an existing game.Here's the result so far: gb.jpg I found a poke that let me advance through all the levels so pl...
by RobC
Wed Apr 18, 2018 8:19 pm
Forum: upcoming and recent events & exhibitions
Topic: Wakefield RISC OS show 21st April 2018
Replies: 29
Views: 1332

Re: Wakefield RISC OS show 21st April 2018

flaxcottage wrote:
danielj wrote:I'll be there bright and early on Saturday morning to set up :)

d.


Ditto. :D

Me too - as long as the traffic isn't too bad [-o<
by RobC
Wed Apr 18, 2018 2:10 pm
Forum: hardware
Topic: RiscPC Second CPU slot ARM possible?
Replies: 1
Views: 110

Re: RiscPC Second CPU slot ARM possible?

I think I read somewhere that the two processor slots are electrically identical so one of the CPU cards needs arbitration logic to allow more than one to run side-by-side. The x86 cards have this logic but the ARM ones don't :( Somewhere, I have an "ARM Switcher" which allowed two ARM car...
by RobC
Tue Apr 17, 2018 2:03 pm
Forum: software: classic games
Topic: Is there a list of games that use co-pros?
Replies: 14
Views: 434

Re: Is there a list of games that use co-pros?

In the January 1985 edition of The Micro User, Peter Johnson mentions a rumour of Acornsoft having a quicker version of "Frogger"/Hopper running on the 6502 co-pro. As I've said before, I think there's loads of potential for writing/porting games to the Pi co-pro. I've got loads of Spectru...
by RobC
Tue Apr 17, 2018 1:54 pm
Forum: software: new games
Topic: Time for Zarch .... on the beeb?!
Replies: 9
Views: 355

Re: Time for Zarch .... on the beeb?!

I thought about it for a while as I think you could do something reasonable with the Pi co-pro but came to the conclusion that it's a bit beyond me! I'd have given it a go if I could have found code for a C version but I only ever found one in Blitz Basic and I have no experience in that. However, I...
by RobC
Mon Apr 16, 2018 8:34 pm
Forum: hardware
Topic: A5000 woes
Replies: 18
Views: 560

Re: A5000 woes

steve3000 wrote:Did you get any further with your A5000 repair?

Not yet - I've been trying to sort out a few other things for the show on Saturday but I'm hoping to take a good look at it soon.
by RobC
Mon Apr 16, 2018 7:01 am
Forum: hardware
Topic: BeebSID 2.4 design files.
Replies: 20
Views: 739

Re: BeebSID 2.4 design files.

Prime wrote:Would be interested to see one of the 2.4 boards, will of course pay the going rate for the bare board.

The boards are free Phill - just PM me your address and I'll send you one.
by RobC
Sun Apr 15, 2018 6:50 pm
Forum: hardware
Topic: Master level shifter for PiTube Direct won't fit with VideoNuLA
Replies: 25
Views: 738

Re: Master level shifter for PiTube Direct won't fit with VideoNuLA

Is there any advantage having it, internally? I wouldn't say so. You could say one advantage is that the internal co-pro is safely tucked inside the machine but conversely it's harder to share between machines (and won't work with a B/B+ without the rare co-pro adapter). I only bought the internal ...
by RobC
Sun Apr 15, 2018 1:34 pm
Forum: hardware
Topic: BeebSID 2.4 design files.
Replies: 20
Views: 739

Re: BeebSID 2.4 design files.

I've generated a BoM from Eagle and have identified suppliers for all the parts. However it works out just short of £20 without the SID :(

If anyone is able to source the parts for less, that would be good!

I still have some bare PCBs left too...
by RobC
Sat Apr 14, 2018 4:25 pm
Forum: hardware
Topic: Master level shifter for PiTube Direct won't fit with VideoNuLA
Replies: 25
Views: 738

Re: Master level shifter for PiTube Direct won't fit with VideoNuLA

As Rob has confirmed that VideoNula will fit under a ReCo I might just have to buy one for the Master :) I've now got my VideoNuLA sitting under an internal Pi Co-pro in my main M128 using some Arduino stacking headers. The ReCo6502 is a great bit of kit but I tend to use the Pi Co-pro more as bein...
by RobC
Sat Apr 14, 2018 8:03 am
Forum: software: new games
Topic: Prince of Persia
Replies: 105
Views: 3121

Re: Prince of Persia

Lardo Boffin wrote:One question - how do you walk slowly? I only played for a few minutes but couldn’t figure out the key combo... :oops:

If you hold down RETURN with left or right then you edge forward.
by RobC
Fri Apr 13, 2018 4:12 pm
Forum: hardware
Topic: IEEE488 Interface
Replies: 23
Views: 2060

Re: IEEE488 Interface

I've just got hold of an Aries B488 interface. Don't know if it's working yet as I've not got any software for it.

From the Acorn User ads I've found, the software apparently came on disk rather ROM - does anyone have a copy?

Thanks,

Rob
by RobC
Fri Apr 13, 2018 3:16 pm
Forum: hardware
Topic: Master level shifter for PiTube Direct won't fit with VideoNuLA
Replies: 25
Views: 738

Re: Master level shifter for PiTube Direct won't fit with VideoNuLA

I may still have a (bare) SmallyMouse PCB left if anyone wants one...
by RobC
Tue Apr 10, 2018 3:23 pm
Forum: hardware
Topic: IntegraB PAL Decoding
Replies: 35
Views: 1437

Re: PAL Decoding

I'm happy to give it a go - I've got pretty good at removing chips without damaging them. There's always the issue that the PALs might be the reason the board isn't working but that'll hopefully show up when I get some equations out of them. I also think it's more likely that the fault is down to ba...
by RobC
Tue Apr 10, 2018 12:28 pm
Forum: hardware
Topic: IntegraB PAL Decoding
Replies: 35
Views: 1437

Re: PAL Decoding

jimnagel wrote:[[ to RobC -- Sorry for this method of contacting you, but I can't find any other.

E-mail sent.
by RobC
Tue Apr 10, 2018 11:36 am
Forum: hardware
Topic: IntegraB PAL Decoding
Replies: 35
Views: 1437

Re: PAL Decoding

I have a non-working Integra board here - I could remove the PALs and try to read them. Might be a week or so before I get round to it though as I've got some other things lined up :)
by RobC
Tue Apr 10, 2018 7:42 am
Forum: hardware
Topic: BBC Micro cut-out space on left hand side of keyboard
Replies: 11
Views: 480

Re: BBC Micro cut-out space on left hand side of keyboard

I think the price was the big factor when it came out and then Superior's Speech, which I think sold well, killed it off. If you look at the speech synthesis module for the TI99/4a (which is basically the same piece of kit), it seems to have been very popular - loads of TI99/4a bundles on eBay have ...
by RobC
Mon Apr 09, 2018 9:36 pm
Forum: introduce yourself
Topic: A new member
Replies: 17
Views: 362

Re: A new member

Welcome Erik - good to have you here :D
by RobC
Mon Apr 09, 2018 4:39 pm
Forum: hardware
Topic: Master level shifter for PiTube Direct won't fit with VideoNuLA
Replies: 25
Views: 738

Re: Master level shifter for PiTube Direct won't fit with VideoNuLA

Just had a quick look at fitting some Arduino stacking headers that I bought ages ago. They give enough clearance to allow the VideoNuLA to be fitted under the internal Pi co-pro (with the short headers). It'll need a couple of the 12-pin variants to make the best connection. However, I don't know w...
by RobC
Mon Apr 09, 2018 12:07 pm
Forum: hardware
Topic: IntegraB PAL Decoding
Replies: 35
Views: 1437

Re: PAL Decoding

cmorley wrote:Can it infer registers, latches & state machines?

The software reports all outputs that it believes to be registered but doesn't go further than that.
by RobC
Mon Apr 09, 2018 12:04 pm
Forum: hardware
Topic: Master level shifter for PiTube Direct won't fit with VideoNuLA
Replies: 25
Views: 738

Re: Master level shifter for PiTube Direct won't fit with VideoNuLA

I'll take a look at this later today. I now have one of Kjell's internal co-pro boards but haven't fitted it into a Master with VideoNuLA yet. I believe Kjell does two versions (one with extended pins) but I went for the shorter version. I have various parts that might work and will report back. I d...
by RobC
Mon Apr 09, 2018 7:36 am
Forum: hardware
Topic: IntegraB PAL Decoding
Replies: 35
Views: 1437

Re: PAL Decoding

I built one of these to help reverse engineer PALs. You just read the PAL as a 27C020 in an EPROM programmer and run the software.

Once you've run the software, you then minimise the equations using something like Logic Friday.
by RobC
Fri Apr 06, 2018 9:21 pm
Forum: hardware
Topic: Trying out RISC OS
Replies: 13
Views: 704

Re: Trying out RISC OS

sydney wrote:Am I missing something obvious?

Don't think so. I believe this is normal behaviour on the Pi - modes with <256 colours default to the 256 colour alternative.
by RobC
Fri Apr 06, 2018 5:59 pm
Forum: hardware
Topic: Testing Beeb's analogue port
Replies: 17
Views: 473

Re: Testing Beeb's analogue port

Think I need to test the analogue port properly. Does anyone have a good guide, or suggestions on how to do this from BASIC? Have a look at the BASIC ADVAL keyword in the User Guide. ADVAL(0) will test the fire buttons, ADVAL(1)-ADVAL(4) will test the X and Y channels of the sticks. OSBYTE &80 ...
by RobC
Fri Apr 06, 2018 8:26 am
Forum: hardware
Topic: New A3020 owner!
Replies: 20
Views: 423

Re: New A3020 owner!

I successfully used a 2GB Apacer DOM with an A3020. (Only the first 512MB was usable under ADFS so I had to softload IDEFS to access the rest.)
by RobC
Fri Apr 06, 2018 8:20 am
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 558
Views: 41262

Re: Palettemate / enhanced video ULA with 4096 colours

Also, it looks like the header cable that comes with the programmer will be of limited use - as the pin out doesn't match exactly the layout of the pins on the NuLA board. Instead, I'll need to take individual jumper wires from the programmer direct to the NuLA JTAG header. Does that sound correct?...