Search found 1724 matches

by RobC
Tue Oct 17, 2017 5:01 pm
Forum: software: other
Topic: 6809 and FLEX
Replies: 121
Views: 7308

Re: 6809 and FLEX

dominicbeesley wrote:Did you get anywhere with this Rob? It would be nice to get FLEX running on my Master and then I could have a go at tweaking the BAS6809 port to work on Flex

Yes - I now have versions that work on the DC and on GoSDC.

I'll dig them out and post them on here later tonight.
by RobC
Tue Oct 17, 2017 2:59 pm
Forum: hardware
Topic: Mystery object, fits Econet socket
Replies: 15
Views: 152

Re: Mystery object, fits Econet socket

It seems that the Econet Level 3 fileserver real time clock module was also potted: http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=ACO-ECONETRTC Maybe this is a Master/Arc equivalent? (Not sure how it would work in place of the Econet module though.)
by RobC
Tue Oct 17, 2017 12:12 pm
Forum: hardware
Topic: Mystery object, fits Econet socket
Replies: 15
Views: 152

Re: Mystery object, fits Econet socket

sirbod wrote:What's on the other side? The chips will help identify it.

From the attachment, it looks like the whole thing is potted/covered in resin.

Makes me think it might be somewhat unusual as it seems like a lot of effort to protect standard hardware...
by RobC
Tue Oct 17, 2017 8:41 am
Forum: software: other
Topic: Variants of ADFS
Replies: 12
Views: 333

Re: Variants of ADFS

From the documentation, it seems that GoSDC can add the contents of a physical hard drive to its flash card: To add a hard disc to the flash card, use : *SDCTool SDCADI AN $4$ <your disc name> I've never tried this but could dig out my SCSI drive and give it a go. I have used the PC-based GoSDCio co...
by RobC
Tue Oct 17, 2017 7:06 am
Forum: software: other
Topic: Z80 on a BBC B
Replies: 30
Views: 223

Re: Z80 on a BBC B

I'd also vote for a Pi co-pro.

Not only is it the cheapest option but, alongside access to super-fast Z80 and 6502 co-pros, you get a 6809, ARM, 32016, 80286 and the 1GHz (!) native Pi ARM. And you can switch between them all with a *FX command.
by RobC
Sun Oct 15, 2017 8:53 am
Forum: hardware
Topic: RISC-PC Not Working
Replies: 52
Views: 2040

Re: RISC-PC Not Working

I thought I read about a clock chip on a podule (or at least carrier board) that you might be able to build to get round battery board leakage where the damage is too bad to put in a replacement component. CJE make them . You can also hire them to see if it fixes the problem: http://www.cjemicros.c...
by RobC
Sat Oct 14, 2017 5:03 pm
Forum: hardware
Topic: AKF12 display issues
Replies: 7
Views: 193

Re: AKF12 display issues

philb wrote:Also discovered that the machine does start the desktop fine if I type *DESKTOP but it always stops at the Supervisor prompt after a reset. Is this likely to be bad CMOS?

Could be. What does *STATUS give for the "Language" setting? I think it should be 10 for the desktop.
by RobC
Fri Oct 13, 2017 10:01 pm
Forum: software: other
Topic: Another C compiler?
Replies: 7
Views: 481

Re: Another C compiler?

Looking through some old Micro Users tonight, I came across this: Brasscourt.jpg Has anyone heard of this before? (I wonder if this is the same company? https://beta.companieshouse.gov.uk/company/01863005 ) EDIT: The surname Earle ties in with the address given in the advert so it looks like it is t...
by RobC
Fri Oct 13, 2017 9:37 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 506
Views: 20986

Re: Palettemate / enhanced video ULA with 4096 colours

Is this new device compatible with the specifications / usage of similar add-ons from the Beeb's heyday?i.e.1. the original Palettemate deviceand2. the SPX (the Saturn Palette Extension) device I've not been able to find any documentation for either of these boards so don't know if the VideoNuLA is...
by RobC
Fri Oct 13, 2017 3:32 pm
Forum: hardware
Topic: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.
Replies: 14
Views: 386

Re: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.

marcusjambler wrote:I'm also interested in getting a copy of the CF card HD image please.

No probs - I'll send you a PM with the link :D
by RobC
Fri Oct 13, 2017 9:33 am
Forum: hardware
Topic: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.
Replies: 14
Views: 386

Re: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.

Good morning everyone. Apologies, please forgive me coming in to this but I've been having the same issue in creating media to install dos plus on my RPi board. I have a CF card on DataCentre, would it be possible to obtain a copy of an image? I think the Dropbox link I setup is still available - I...
by RobC
Fri Oct 13, 2017 7:04 am
Forum: for sale / freebies
Topic: SmallyMouse2 bare PCBs FTAGH
Replies: 5
Views: 144

Re: SmallyMouse2 bare PCBs FTAGH

Now all gone - I'll PM everyone who has expressed an interest.
by RobC
Thu Oct 12, 2017 4:59 pm
Forum: for sale / freebies
Topic: SmallyMouse2 bare PCBs FTAGH
Replies: 5
Views: 144

SmallyMouse2 bare PCBs FTAGH

With my latest order of VideoNuLA PCBs, I noticed that EasyEDA were offering 10 additional PCBs for $2 with each order. So, I ordered 10 SmallyMouse2 PCBs and, on the basis that I'll probably never need more than 3 for myself, am offering the rest on here. Please note, the offer was only for lead-ba...
by RobC
Wed Oct 11, 2017 8:57 pm
Forum: upcoming and recent events & exhibitions
Topic: London Show / Saturday 28th October 2017
Replies: 11
Views: 441

Re: London Show / Saturday 28th October 2017

helpful wrote:Do we have any Atoms or Electrons yet? Anyone bringing a Pi copro?

I was planning to bring a Pi copro.
by RobC
Wed Oct 11, 2017 8:09 am
Forum: software & utilities for the pc, mac or unix
Topic: BBC Micro Image Converter 0.20 released!
Replies: 24
Views: 4027

Re: BBC Micro Image Converter 0.20 released!

If so I'd love to be able to export to beeb at a specific resolution, I'm trying to convert some Apple II screens that are 280x192, any chance you're still in development and might take a look? When I was doing this for BeebJack, I just modified the source images in Paint so that they had a black b...
by RobC
Tue Oct 10, 2017 9:20 pm
Forum: general
Topic: "Beebon" magazines on 8bs
Replies: 7
Views: 235

Re: "Beebon" magazines on 8bs

This is something I hadn't come across before but, if you look at the scan of the July 1982 PCW at the same site, there's a section called "Mapping out the Beebon". So, the name seems to have been in common usage in the early days.
by RobC
Tue Oct 10, 2017 12:43 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 506
Views: 20986

Re: Palettemate / enhanced video ULA with 4096 colours

Is it possible to the future, a new version of VNuLA, which will put the boards over the soldered ULAs without removed the old chips? Possibly though you'd still have to disable the original as you wouldn't want both the VideoNuLA and original ULA generating the system clocks and colour output. (I ...
by RobC
Tue Oct 10, 2017 6:46 am
Forum: hardware
Topic: Video ULA/proc VC2023 in an Iss3 beeb weirdness..
Replies: 7
Views: 202

Re: Video ULA/proc VC2023 in an Iss3 beeb weirdness..

Glad you got it sorted :D :D
by RobC
Mon Oct 09, 2017 8:39 pm
Forum: hardware
Topic: Video ULA/proc VC2023 in an Iss3 beeb weirdness..
Replies: 7
Views: 202

Re: Video ULA/proc VC2023 in an Iss3 beeb weirdness..

Those games all do palette changes mid-frame don't they?

Could it be a problem with a 6522 causing timer issues?
by RobC
Mon Oct 09, 2017 5:50 pm
Forum: general
Topic: Today I received.....
Replies: 4200
Views: 223327

Re: Today I received.....

paulv wrote:My two year all clear :D

Excellent news! :D =D>
by RobC
Mon Oct 09, 2017 11:40 am
Forum: software: classic games
Topic: Hunchback for VideoNuLA (16 colours)
Replies: 8
Views: 354

Re: Hunchback for VideoNuLA (16 colours)

Just found what I think is a simple test case for the B-Em palette mapping issue: 10 ?&FE22=&40:REM Reset VideoNuLA 20 ?&FE22=&11:REM Change palette mapping mode 30 MODE 2 40 FOR I=0 TO 15 50 COLOUR I 60 PRINT "HELLO" 70 NEXT On running on real hardware, the display shows &...
by RobC
Sun Oct 08, 2017 8:29 pm
Forum: emulators
Topic: Emulator support for VideoNuLA
Replies: 32
Views: 1775

Re: Emulator support for VideoNuLA

That looks really good Tom =D> =D> The extra scanlines could be related to the interrupt timing... When I was tweaking the row timings to get the multiple ruptures working, I found that adjustments in the timings sometimes caused extra scanlines at the top of the display (I guess because the overall...
by RobC
Sun Oct 08, 2017 1:17 pm
Forum: software: classic games
Topic: Hunchback for VideoNuLA (16 colours)
Replies: 8
Views: 354

Re: Hunchback for VideoNuLA (16 colours)

Let me take a look when I’m home and I’ll send you a note about what I should be seeing with the earlier ssd and any clarifying questions. No rush - I still need to get my head around exactly what the issue is. Let me see if I can pin down a test case - might be a little while as I'm looking at get...
by RobC
Sun Oct 08, 2017 7:29 am
Forum: software
Topic: RISC iX - Cloned!
Replies: 168
Views: 15003

Re: RISC iX - Cloned!

ajw99uk wrote:Yes, Ether1 = AKA25, so I'll have to look elsewhere for my glitch. Ho hum.

My R260 used to give random panics due to track corrosion. They only went away when I patched up the worst affected tracks with kynar wire.

Might be worth cleaning contacts and checking connectors?
by RobC
Sat Oct 07, 2017 9:35 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1156
Views: 78460

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

trixster wrote:This might be a little cheeky but if I were to post it to one of you guys would you be able to flash it for me?

Happy to do it for you. Send me a PM and we can arrange things.

Cheers,

Rob
by RobC
Sat Oct 07, 2017 4:45 pm
Forum: projects
Topic: Starting a Prince of Persia port...
Replies: 103
Views: 5504

Re: Starting a Prince of Persia port...

This is amazing - great work Kieran =D> =D> :D
by RobC
Sat Oct 07, 2017 4:13 pm
Forum: software: classic games
Topic: Hunchback for VideoNuLA (16 colours)
Replies: 8
Views: 354

Re: Hunchback for VideoNuLA (16 colours)

Seems like we got our first Beebs at the same age and time :) Playing this on a real machine today, I realised that I'd forgotten to set the VideoNuLA palette for colour 8 and this caused flashing blocks around the lives counter. B-Em doesn't seem to have this issue for some reason. Anyway, here's t...
by RobC
Sat Oct 07, 2017 3:48 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1156
Views: 78460

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

Hi Dave, Just tested that release on my BBC 'B' and it all looks good =D> =D> Changing from the ARM co-pro now works reliably - I spent 10 minutes flipping between processors and didn't see it fail once :D Haven't tested it on a Master yet but, given the Beeb displayed the problem most often, I susp...
by RobC
Fri Oct 06, 2017 8:37 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1156
Views: 78460

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

Hi Dave,

Not seen any problems switching between the other copros but I'll stress test it tomorrow.
by RobC
Fri Oct 06, 2017 3:50 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1156
Views: 78460

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

I'd be interested in feedback on the last item from anyone who has been having issues switching between different co processors. Just upgraded my Matchbox boards. I have one of the red boards with decoupling mod and am using a 3-inch cable. On my BBC B, switching between co-pros is okay apart from ...

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