Search found 1864 matches

by Pernod
Tue Apr 07, 2020 6:51 pm
Forum: hardware
Topic: Pi based Prisma 3 emulation connected via 1Mhz bus
Replies: 21
Views: 1645

Re: Pi based Prisma 3 emulation connected via 1Mhz bus

You setup the 20 bit memory address in the RWP register and then use the RD or WR commands. I recall I wrote some code for direct reading and writing of the ACRTC memory using those commands so I'll see if I can find that as it should explain the finer details. That should be very helpful. I can on...
by Pernod
Tue Apr 07, 2020 4:25 pm
Forum: hardware
Topic: Pi based Prisma 3 emulation connected via 1Mhz bus
Replies: 21
Views: 1645

Re: Pi based Prisma 3 emulation connected via 1Mhz bus

Looks good so far Thanks, struggling with DMA though. For DMA (used to load pics directly to video RAM) the HD63484 can use an external DMAC controller which uses the DREQ, DACK, DONE lines, but according to the schematic these lines are only connected for use with the 16bit Archimedes interface. T...
by Pernod
Tue Apr 07, 2020 1:33 pm
Forum: off-topic
Topic: Which retro calculator is best?
Replies: 26
Views: 605

Re: Which retro calculator is best?

Used this for my 'A' levels, probably needs a new battery. I seem to remember we weren't allowed scientific calculators in the 'O' level exams, having to use tables, so had a basic calculator before this which seems to have disappeared. 20200407_135024.jpg Then upgraded to this for uni, I think. The...
by Pernod
Sun Apr 05, 2020 1:58 am
Forum: hardware
Topic: Pi based Prisma 3 emulation connected via 1Mhz bus
Replies: 21
Views: 1645

Re: Pi based Prisma 3 emulation connected via 1Mhz bus

Showing signs of life, but really need to get DMA implemented to be able to load pics ...
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by Pernod
Tue Mar 31, 2020 11:44 am
Forum: emulators
Topic: MAME: Video Digitisers
Replies: 15
Views: 1064

Re: MAME: Video Digitisers

Right at the bottom of the box I found the manual for the RH digitiser, plus a supplement for the Image Processor ROM upgrade. I don't think I have a chip or an image of that. At some point I'll scan the manuals if they are not available already, shouldn't be too arduous, they are little A5 booklet...
by Pernod
Mon Mar 30, 2020 4:06 pm
Forum: software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 69
Views: 1774

Re: Repton 3: Emulator/RNG issue

geraldholdsworth wrote:
Mon Mar 30, 2020 3:27 pm
There is someone on here that knows Matthew Atkinson. Might it be worth asking him if he still has the source, and if he is willing to share?
Yes, I know him. He's in the Acorn Facebook group so anyone can easily contact him.
by Pernod
Sat Mar 28, 2020 9:04 pm
Forum: general
Topic: Photos of your Acorn setup, Back In The Day?
Replies: 19
Views: 467

Re: Photos of your Acorn setup, Back In The Day?

This is me at Christmas 1982 with the new Beeb, connected to the big TV. Photo 239.jpg Not sure of the year, but now have a dedicated desk, portable TV, and single PACE floppy drive. Photo 802.jpg And finally by Christmas 1986 it's in a Viglen case and we have a CUB monitor. (Name that game?) Photo ...
by Pernod
Sat Mar 28, 2020 10:35 am
Forum: archive requests
Topic: Electron Solidisk EFS
Replies: 4
Views: 1047

Re: Electron Solidisk EFS

Hi Nigel, did this make it into MAME? If not, is it something you'd look at implementing? Ta! Yes, the Solidisk EFS cartridge was added a couple of days after I found the ROM, see https://github.com/mamedev/mame/commit/91da52721edb64a257962ff4d11550051c2633ed. The Winchester/1MHz bus socket was onl...
by Pernod
Wed Mar 25, 2020 12:10 pm
Forum: off-topic
Topic: Isolating myself - for three months !!!!!!!!!!!
Replies: 33
Views: 1414

Re: Isolating myself - for three months !!!!!!!!!!!

flaxcottage wrote:
Tue Mar 24, 2020 4:42 pm
Attached is a list of the ROMs I have found so far. The aim is to package these on SSD images so that they are easy to access for anyone who wants them. :D
Thanks, didn't notice anything unknown amongst them, but will take a closer look at versions when they're available.
by Pernod
Tue Mar 24, 2020 9:18 am
Forum: off-topic
Topic: Isolating myself - for three months !!!!!!!!!!!
Replies: 33
Views: 1414

Re: Isolating myself - for three months !!!!!!!!!!!

So far I have 'discovered' that I have about 400 different ROMs. These ROMs include different version numbers. Some have titles I have not met before and do not appear on sites such as mdfs.net. Looks like there will soon be another section on my website. :D Keep me posted, always enjoy going throu...
by Pernod
Mon Mar 23, 2020 10:13 pm
Forum: adventures
Topic: Level 9's Fantasy
Replies: 6
Views: 348

Re: Level 9's Fantasy

Also, could someone recommend some Nascom emulator / software sites please ? In particular I'd like to play the 16k version of Colossal Adventure if possible. All are working in MAME, both 16K and 32K version of Colossal available from http://www.nascomhomepage.com/#TheNascomRepository 0000.png 000...
by Pernod
Thu Mar 19, 2020 5:11 pm
Forum: emulators
Topic: BeebEm and the Cumana 68008 co-processor
Replies: 13
Views: 2492

Re: BeebEm and the Cumana 68008 co-processor

I'll put the code on GitHub soon so anyone can review and make additions. Not really my idea to make yet another fork of BeebEm, but for now it seems like the best option. Sometime in the future it could/should be integrated in a master branch of BeebEm. Did you publish the code on GitHub? I'd be i...
by Pernod
Wed Mar 18, 2020 10:32 pm
Forum: emulators
Topic: BeebEm and the Cumana 68008 co-processor
Replies: 13
Views: 2492

Re: BeebEm and the Cumana 68008 co-processor

0184.png 0185.png 0186.png The disk images provided are not well documented, so not obvious which should be booted. The obvious OS9BOOT doesn't seem to work but the System Master disks make further progress. Without anyone with actual hardware I can't know whether some of the disk images are bad or...
by Pernod
Wed Mar 18, 2020 10:26 pm
Forum: emulators
Topic: BeebEm and the Cumana 68008 co-processor
Replies: 13
Views: 2492

Re: BeebEm and the Cumana 68008 co-processor

I never thought I'd see this ...
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by Pernod
Mon Mar 16, 2020 2:14 pm
Forum: emulators
Topic: BeebEm and the Cumana 68008 co-processor
Replies: 13
Views: 2492

Re: BeebEm and the Cumana 68008 co-processor

The hardware of the Cumana 68008 was reviewed in A&B Computing Jan.87, does anyone have this and able to post a scan of it? These really should be freely available like all other Acorn magazines. My emulation feels like it's very close to working, just some minor detail missing. The OS9BOOT floppy b...
by Pernod
Sat Mar 14, 2020 3:47 pm
Forum: emulators
Topic: MAME: IDE/SCSI and other large storage devices
Replies: 48
Views: 2382

Re: MAME: IDE/SCSI and other large storage devices

The DataCentre is now mostly emulated, including RAM and NVRAM drives. The USB ports will not be added anytime soon as MAME doesn't yet implement any USB controllers. Instead of using *IMPORT from USB to RAMFS I added a quickload option to import any ssd,dsd,img from your local filesystem into any R...
by Pernod
Wed Mar 11, 2020 9:36 pm
Forum: software: other
Topic: Acornsoft View versions
Replies: 21
Views: 1208

Re: Acornsoft View versions

Hmmmmm .... Is it likely that ALL View3.0 versions are versions of the Master version, hacked to work on the BBC B? A dump of the ROM doesn't identify it as any Version. I suggest this because all of the discrete View documentation seems to top out at Version 2.1. I've seen View 3 advertised, which...
by Pernod
Wed Mar 11, 2020 5:55 pm
Forum: software: other
Topic: Acornsoft View versions
Replies: 21
Views: 1208

Re: Acornsoft View versions

The first surprise was that it is invoked by *VIEW rather than *WORD as with ViewA2.1. Yeah, not sure whether that version is official. There are two versions of A3.0 at http://bbc.nvg.org/rom/Acorn/apps/ The A3.0x uses *WORD and A3.0 uses *VIEW. Also the A3.0 contains some &EA NOPs so is probably ...
by Pernod
Wed Mar 11, 2020 11:51 am
Forum: software: other
Topic: Acornsoft View versions
Replies: 21
Views: 1208

Re: Acornsoft View versions

Wheel_nut wrote:
Wed Mar 11, 2020 11:40 am
Could I ask you to upload your ViewA3.00 Image and give me a linky to it please. I cannot find a working Image anywhere. :(
https://acorn.huininga.nl/pub/roms/Acornsoft/View/
by Pernod
Wed Mar 11, 2020 2:00 am
Forum: software: other
Topic: Acornsoft View versions
Replies: 21
Views: 1208

Re: Acornsoft View versions

Wheel_nut wrote:
Wed Mar 11, 2020 1:51 am
I tried to run View3.0 on my BBC B and it doesn't seem to work. I reverted to ViewA2.1 and it seems to work well.

Am I correct in deducing that View3.0 was only for the Master and later machines?
For BBC B you need A3.0, whereas B3.0 is Master only.
by Pernod
Tue Mar 10, 2020 11:12 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4032

Re: Who's ready for... guess that game! ;D

billcarr2005 wrote:
Tue Mar 10, 2020 10:18 am
Uncle Claude :)
The key was the give away, appears when you've pushed everything onto the conveyor belt
Yep, I'm with you on that. I knew I recognised it but couldn't think what it was.
by Pernod
Fri Mar 06, 2020 9:54 pm
Forum: hardware
Topic: Richardson Computer System
Replies: 14
Views: 1060

Re: Richardson Computer System

eelco108 wrote:
Fri Mar 06, 2020 3:04 pm
If it is I would have to solder the two leads back on the User Port's d0 and d1 pins to test it, but that's doable.
We have emulators for that. I'll gladly take a look at anything you may find.
by Pernod
Fri Mar 06, 2020 2:50 pm
Forum: hardware
Topic: Richardson Computer System
Replies: 14
Views: 1060

Re: Richardson Computer System

So it is based on BBC+ DRAM chips and a RAM controller, the TMS4500 (datasheet can be found online: just google for it), which reads and writes the RAM, but also does the refreshing. The required 8 MHz clock is taken from the Beeb, as is the 2 MHz clock and R/NW line. The board really looks like a ...
by Pernod
Fri Mar 06, 2020 11:06 am
Forum: archive requests
Topic: Missing BBC Games HELP REQUIRED!
Replies: 37
Views: 12726

Re: Missing BBC Games HELP REQUIRED!

It would also be incredibly useful to have a list of MIA educational software (already talking to FlaxCottage about that), 'other' software, and hardware as well, although I appreciate that for the latter categories it's a pretty big area to cover! When it comes to software for specific hardware an...
by Pernod
Tue Mar 03, 2020 2:52 am
Forum: archive submissions
Topic: CMS system roms.
Replies: 31
Views: 2775

Re: CMS system roms.

Decided to take another look at this, and now seems to be fully working :D
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I'm now tempted to try hooking it upto the Tube with CMS Link.
by Pernod
Sun Mar 01, 2020 8:02 pm
Forum: other vintage computer hardware, software and games
Topic: Dragon 32 Rom fault
Replies: 9
Views: 435

Re: Dragon 32 Rom fault

Just had a deja vu moment, went to catch up on the latest Dragon Archive posts and came back here and saw the same topic :lol:
by Pernod
Sat Feb 29, 2020 8:16 pm
Forum: other vintage computer hardware, software and games
Topic: Micro-Robotics Scorpion 1986
Replies: 2
Views: 172

Re: Micro-Robotics Scorpion 1986

Just to confirm, though it was part of a batch of ROMs I passed to JGH for dumping, I can't provide any further info as I was never in possession of the actual device. I did wonder, so thanks for clarifying. I'm not really expecting any results to this quest here. Can anyone recommend any FB/Reddit...
by Pernod
Sat Feb 29, 2020 8:04 pm
Forum: hardware
Topic: Clwyd Technics Colour Palette enhancer
Replies: 42
Views: 2780

Re: Clwyd Technics Colour Palette enhancer

The documentation said &FC80: link upthread It's incorrect. There are two sets of ROMs posted by IanB for the CTS Colour Card 500, these are basically a custom version of The Artist with an additional ROM to use a Graphic Pad as input. One set uses the normal userport, and the other set uses the us...
by Pernod
Sat Feb 29, 2020 2:45 pm
Forum: emulators
Topic: MAME: Click (and other large ROMs)
Replies: 108
Views: 7951

Re: MAME: Click (and other large ROMs)

Its 15us (well, I make it 16us actually, but maybe there are some delays or something which make it 15). The divisions that take place are as shown below: Thanks for confirming, and explaining the dividers. It helps me document the hardware, but still no closer to working. I'll have to setup a trac...
by Pernod
Fri Feb 28, 2020 7:49 pm
Forum: hardware
Topic: Clwyd Technics Colour Palette enhancer
Replies: 42
Views: 2780

Re: Clwyd Technics Colour Palette enhancer

I've had the Colour Palette implemented for awhile now, but still not convinced it's correct. The PALETTE program lets you adjust the colours and what I see matches the set RGB values, it's the SUNRISE demo that's bothering me. I can't get my emulation to match the video previously posted by RobC, a...