Search found 1223 matches

by Pernod
Fri Aug 10, 2018 9:30 pm
Forum: emulators
Topic: MAME Acorn System ROMS.
Replies: 4
Views: 158

Re: MAME Acorn System ROMS.

Cheers for the speedy reply, figured you'd have them :) Are you going to be at the Cambridge meetup, if so I'll bring the CMS along with me for you to have a poke at :) Cheers. Phill. I intend to, as a visitor. It'll be a day return from London, but not sure if I can escape family commitments at th...
by Pernod
Fri Aug 10, 2018 9:26 pm
Forum: emulators
Topic: MAME Acorn System ROMS.
Replies: 4
Views: 158

Re: MAME Acorn System ROMS.

And also the software lists, extract into your roms folder, so you have roms/acrnsys_flop/sbasic.zip, etc.
by Pernod
Fri Aug 10, 2018 9:20 pm
Forum: emulators
Topic: MAME Acorn System ROMS.
Replies: 4
Views: 158

Re: MAME Acorn System ROMS.

Here you go, these are valid for MAME 0.200.
by Pernod
Wed Aug 08, 2018 12:43 pm
Forum: software: new games
Topic: New Release: Retro Software's WHITE LIGHT by Sarah Walker
Replies: 91
Views: 6601

Re: New Release: Retro Software's WHITE LIGHT by Sarah Walker

leenew wrote:
Wed Aug 08, 2018 12:29 pm
I still get a black screen after entering my initials... :cry:
Write protected maybe? Doesn't it try to save your hi-scores?
by Pernod
Sun Aug 05, 2018 3:27 pm
Forum: other vintage computer hardware, software and games
Topic: Powys County Council’s first PC
Replies: 8
Views: 248

Re: Powys County Council’s first PC

I used these at work back in the 90's, they ran HP BASIC. We had a pile of them that were kept for spare parts, including huge 8" twin floppy drives. Everything weighed a ton, though the monitor was detachable for transport. The tape drives and printer were modular and could be easily swapped with d...
by Pernod
Wed Aug 01, 2018 8:10 pm
Forum: hardware
Topic: RISCOS ROMs
Replies: 3
Views: 158

Re: RISCOS ROMs

Thanks! Real ROMs wouldn't need to be interleaved though right? I have some real RO2 ROM's known working I could use to backup the nand write Correct , real ROMs are already interleaved. If you backup your real RO2 ROMs and examine the contents you won't see any readable text as they each contain e...
by Pernod
Wed Aug 01, 2018 5:02 pm
Forum: hardware
Topic: RISCOS ROMs
Replies: 3
Views: 158

Re: RISCOS ROMs

All I can find on *. and elsewhere is that they are interleaved somehow but surely a copy is a copy and should just work?? The ROMs commonly found and used in emulators are not interleaved, they do not represent the data found on each of the 4 ROMs and will not work in actual hardware. To re-interl...
by Pernod
Wed Aug 01, 2018 11:01 am
Forum: acorn atom
Topic: An unknown Acorn Atom Clone found?
Replies: 10
Views: 419

Re: An unknown Acorn Atom Clone found?

carlosanta wrote:
Wed Aug 01, 2018 9:28 am
In the meantime I can attach some other photos of maniboard and the back with ports (consider that those photos came from two models of the SHINE1.
Thanks, but I'll need better photos than those. I need to be able to read and identify all components, including any crystals.
by Pernod
Wed Aug 01, 2018 12:24 am
Forum: acorn atom
Topic: An unknown Acorn Atom Clone found?
Replies: 10
Views: 419

Re: An unknown Acorn Atom Clone found?

I've taken a quick look at getting this running in MAME. It is not an Atom clone. The memory map looks something like: 0000-3fff RAM 16K 9400-940f 6522 VIA 9800-afff VIDEO RAM b000-bfff ROM IC58 c000-cfff ROM IC59 d000-dfff ROM IC62 e000-efff ROM IC61 f000-ffff ROM IC60 The machine is running but I ...
by Pernod
Sat Jul 14, 2018 8:58 pm
Forum: software: other
Topic: Electron Demos
Replies: 7
Views: 253

Re: Electron Demos

I saved the files to UEF for you using BeebEm. This was never intended to be distributed on tape so the tape loading corrupts the screen.
by Pernod
Sat Jul 14, 2018 7:25 pm
Forum: software: other
Topic: Electron Demos
Replies: 7
Views: 253

Re: Electron Demos

Bones is on my Animation disc at viewtopic.php?f=32&t=5802&p=108594#p54096
by Pernod
Wed Jul 04, 2018 6:46 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

There are a few different versions of the System Econet ROM out there: - System/3 Econet 1.48 - Econet 2.40 - Econet 3.40 - Econet 3.50 The 2/3 versions are mapped at &E000, where would these be inserted in a System 3? I'd assume in an 8K Static RAM board IC17 with the ROM region links set to &E000-...
by Pernod
Sun Jul 01, 2018 11:37 am
Forum: general
Topic: BBC releases computer history archive
Replies: 112
Views: 2531

Re: BBC releases computer history archive

Classic clip... My dad's standard reply to anyone having a problem became 'Have you got a VIC-20?'.

https://computer-literacy-project.pilot ... 5fb3049258
by Pernod
Wed Jun 27, 2018 11:10 am
Forum: hardware
Topic: Missing old/new Electron Expansions
Replies: 76
Views: 1277

Re: Missing old/new Electron Expansions

I should think reverse engineer pegasus would be fairly easy (well maybe not for me) I emulate the Pegasus in MAME, it's a fairly standard 1770 implementation at &FCC4-C7, with the following control latch at &FCC0: bit 0, 1: drive select bit 2: side select bit 3: density bit 4: send DRQ to NMI sign...
by Pernod
Sun Jun 24, 2018 7:36 pm
Forum: upcoming and recent events & exhibitions
Topic: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon
Replies: 26
Views: 828

Re: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon

kieranhj wrote:
Sun Jun 24, 2018 7:34 pm
Oops, yes I can sort that. Not sure what happened there , must be a dodgy disc template in the build process.
Thanks, I remember White Light having the same problem so probably an issue with whatever you use to create the image.
by Pernod
Sun Jun 24, 2018 6:48 pm
Forum: upcoming and recent events & exhibitions
Topic: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon
Replies: 26
Views: 828

Re: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon

Minor comment, but could you fix the downloadable SSD to conform to DFS. It's missing the sector count at offset &106-&107. A Watford DFS reports 00 tracks, and MAME requires this to determine the format of the file whether 40/80 tracks. For 40 tracks replace bytes &106-&107 with &31, &90. For 80 tr...
by Pernod
Sun Jun 24, 2018 10:38 am
Forum: upcoming and recent events & exhibitions
Topic: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon
Replies: 26
Views: 828

Re: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon

kieranhj wrote:
Sun Jun 24, 2018 10:34 am
For those interested, and who don't mind the magic being spoiled, I will post some technical details on a thread in the programming section soon.
I'm curious as to what it does differently depending on emulator vs real hardware option.
by Pernod
Thu Jun 21, 2018 3:18 pm
Forum: archive submissions
Topic: Atom ROMs
Replies: 5
Views: 432

Re: Atom ROMs

The MYSTERY is ONLI, whereas ONLI is MYSTERY mirrored. ONLI is mentioned for the System 3, could this be it? acornsystem1and3.jpg Also, from the Acorn Computer Systems Catalogue: ONLI Extension This is an additional 2K byte program which adds statements to BASIC allowing the control of experiments i...
by Pernod
Thu Jun 21, 2018 1:01 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

I've got a few more somewhere, but I've started tidying them to here . Thanks, had already found those. Attached a utilities disc which contains some BASIC programs. It probably came from somewhere on the forum and claims to be for System 3. They appear to be for the 40 column card, but don't seem ...
by Pernod
Wed Jun 20, 2018 10:58 am
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

It depends on the key, e.g. pressing and releasing 1,2 or 3 then BREAK tries to boot but pressing and releasing Q, W or E then BREAK gets back to the prompt. Of course, depending on key>='@'. The only thing I have for it is the Level II file server which I posted here some time ago: https://stardot...
by Pernod
Tue Jun 19, 2018 9:17 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

I have a System 5 Excellent, and thanks for the clarifications. What about on pressing BREAK? If pressing BREAK straight after startup at prompt I'd expect to get the prompt again, but if any other input before BREAK then tries to boot? Do you have any floppies worth imaging for it, maybe an offici...
by Pernod
Tue Jun 19, 2018 8:34 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

The keyboard implementations slightly differ between the System 3 and 5. The System 3 uses the 6502 board with keyboard connected to PA of the 6522. PA0-PA6 are ASCII of key presses and PA7 is STROBE indicating when pressed/released. The System 5 uses the 6502A board with keyboard again connected to...
by Pernod
Tue Jun 19, 2018 7:04 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

From your disassembly:

Code: Select all

BIT &0E21:BVS LFF6D      :\ If key>='@' or no key pressed, skip past boot
LDX #&04                 :\ Normally SPACE-BREAK to boot
Does this mean that if no key is pressed then &0E21 is &FF?
by Pernod
Tue Jun 19, 2018 5:06 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

Checking the code I believe it does. On Reset if no key is pressed it goes to the DOS prompt. If SPACE is pressed the disk in drive 0 is examined for the boot option and a BOOT file. I'll take a closer look at your source. If I place &FF in the keyboard buffer at reset then I get the prompt, otherw...
by Pernod
Tue Jun 19, 2018 1:43 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 18
Views: 820

Re: MAME: Acorn System

Does anyone have a working System 3/5 machine? I need to clarify some behaviour. In Acorn DOS without a disc in the drive and I press RETURN the machine will wait for the floppy READY line to be asserted, loops indefinitely. Is this expected? With a disc in the drive it will respond with 'Command?' ...
by Pernod
Sat Jun 16, 2018 2:05 pm
Forum: for sale / freebies
Topic: Moving House - Items to go
Replies: 35
Views: 1516

Re: Moving House - Items to go

Watford Electronics Diagnostics Utility Disk & Manual. No idea if it works, but might be of interest to someone. Would be nice if whomever gets this could image the disk and scan the manual. Free to a good home, either collect or you cover the cost of P&P. I'll take this please. PM me P&P details.
by Pernod
Thu Jun 14, 2018 1:51 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 81
Views: 2809

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

There are a handful of ROMs I'd like to see dumped during this event, assuming someone will have suitable equipment there. Can I put forward a wishlist? No harm in asking! :) Presumably bar a Beeb and the actual ROM..and means of exporting to modern storage, which many of us have.. only a ROM dump ...
by Pernod
Wed Jun 13, 2018 3:07 pm
Forum: archive submissions
Topic: CMS system roms.
Replies: 30
Views: 1327

Re: CMS system roms.

Just whether either of IRQ and NMI lines are connected. INTRQ -> IC6-LS244 pin 17 DRQ -> IC6-LS244 pin 2 The outputs from those buffers go to Pin 18 to D7, Pin 3 to D6. This suggests to me that the DRQ and INTRQ are polled by reading an IO register which triggers the gate on the LS244. There is als...
by Pernod
Tue Jun 12, 2018 9:07 pm
Forum: general
Topic: The Adventure Game (BBC TV, 1980-86): Beebs on TV
Replies: 18
Views: 291

Re: S1E4

lurkio wrote:
Tue Jun 12, 2018 8:44 pm
Series 1, Episode 4
vlcsnap-2017-08-08-16h43m10s330.jpeg
It's a HP9845, I used to work with them back in the 90's.