Search found 1198 matches

by SarahWalker
Mon Jan 06, 2020 5:59 pm
Forum: hardware
Topic: How many 8bit beeb basic machines
Replies: 19
Views: 511

Re: How many 8bit beeb basic machines

FWIW, the serial number thread has estimates of ~350k for Electron, ~260k for Master 128 and ~40k for Master Compact, which I think are reasonably accurate. BBC A/B numbers are less certain, but look to be sub-1 million, probably in the area of 700-800k. B+ is even less clear but is almost certainly...
by SarahWalker
Sat Jan 04, 2020 11:09 am
Forum: off-topic
Topic: Modern Assembly and Compilers
Replies: 31
Views: 401

Re: Modern Assembly and Compilers

Nintendo are on ARM these days. Gamecube/Wii/Wii U were PowerPC, as were Xbox 360 and PS3.
by SarahWalker
Fri Dec 27, 2019 12:28 pm
Forum: software
Topic: New demo - Horizon
Replies: 11
Views: 1615

Re: New demo - Horizon

Following from the belated final version here's the belated writeup! Loader Loading screen was originally meant to be Farbrausch-style, but I decided this was boring and added the spinning balls. Screen is in MODE 9, the balls are preshifted and used to mask a solid colour. Everything in the demo is...
by SarahWalker
Tue Dec 17, 2019 8:39 pm
Forum: software: other
Topic: New music conversion - Castlevania III
Replies: 17
Views: 1061

Re: New music conversion - Castlevania III

It's an ADFS disc so you need to do a SHIFT-A-BREAK.
by SarahWalker
Sun Dec 08, 2019 10:01 am
Forum: software
Topic: New demo - Horizon
Replies: 11
Views: 1615

Re: New demo - Horizon

Finally got the final/non-party version done. Fixes some glitches, improves a couple of parts, adds StrongARM and VGA support, and the music player doesn't go out of tune...
by SarahWalker
Mon Nov 25, 2019 12:33 pm
Forum: emulators
Topic: How to create an hdf file in windows from an ADFS HD
Replies: 4
Views: 302

Re: How to create an hdf file in windows from an ADFS HD

RPCemu, and Arculator pre-v2.0, need a dummy 512 byte header on the front of hard disc images. This is one of my stupid bugs from circa 2006, and I'm a bit embarrassed that it's still causing problems!
by SarahWalker
Sun Nov 24, 2019 9:38 am
Forum: software: other
Topic: New music conversion - Castlevania III
Replies: 17
Views: 1061

New music conversion - Castlevania III

It's been a couple of years or so, must be time for a new music conversion. Today's ABUG release is Castlevania III : Dracula's Curse, or to be more precise Akumajō Densetsu, as this is the Famicom version that's been converted. This has an additional sound chip in the cartridge, adding an extra 3 v...
by SarahWalker
Thu Nov 14, 2019 10:08 pm
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Re: Arculator v2.0 released!

Yes, that should work.
by SarahWalker
Thu Nov 14, 2019 8:40 am
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Re: Arculator v2.0 released!

Dunkinator wrote:
Wed Nov 13, 2019 6:40 pm
Thanks so much Sarah and great job! Does this version support hard drives under RISC OS 2.0?
Yes, either via the internal ST-506 interface (if you've configured an Archimedes 4xx machine), or via an ST-506/RISC Developments IDE/SCSI podule.
by SarahWalker
Sun Nov 10, 2019 8:50 pm
Forum: hardware
Topic: Joystick interfaces
Replies: 5
Views: 309

Re: Joystick interfaces

GamesPad/GamesPad Pro connects two SNES controllers to the printer port. 8 buttons each, software allows keyboard mapping and RISC OS 3 joystick SWIs. IIRC the only difference between GamesPad and GamesPad Pro is the exact type of controller used, with the latter having turbo. The Serial Port interf...
by SarahWalker
Sun Nov 10, 2019 8:59 am
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Re: Arculator v2.0 released!

I'll have to look into why that dialog is popping up, however you can just press 'Cancel' and from that point the image seems to work fine.
by SarahWalker
Sat Nov 09, 2019 7:51 pm
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Re: Arculator v2.0 released!

Thanks a lot for this new version - the machine config alone is really great! Still experimenting with all the new stuff. There seems to be a problem with connecting existing .hdfs with e.g. ADFS and ZIDEFS IDE, but it is too early to suggest a bug! Arculator used to have a bug where it added a poi...
by SarahWalker
Sat Nov 09, 2019 3:38 pm
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Re: Arculator v2.0 released!

Windows zip file now replaced with a non-broken version.
by SarahWalker
Sat Nov 09, 2019 2:51 pm
Forum: emulators
Topic: Arculator v2.0 released!
Replies: 24
Views: 3315

Arculator v2.0 released!

That can't be right. It's apparently been TEN YEARS since the last Arculator release. I'm old... Anyway, here's v2.0. Changes from v0.99 : FPA10 emulation Podule emulation. Current included podules : AKA31 SCSI Podule, AKD52 Hard Disc Podule, Computer Concepts Lark, HCCS Ultimate CD-ROM, ICS ideA, R...
by SarahWalker
Tue Oct 22, 2019 4:54 pm
Forum: hardware
Topic: RiscPC600 with StrongArm
Replies: 9
Views: 838

Re: RiscPC600 with StrongArm

I might have noticed a StrongArm-200MHz-card, right ? Some I-cubic Ethernet adapter with RJ45 and BNC ? Yep. What is this very small board vertically seated that only connects via a handfull of pins to the main PCB ? Looks like a 16-bit sound card. Early RiscPCs only supported 8-bit audio on the mo...
by SarahWalker
Sat Oct 12, 2019 11:54 am
Forum: software
Topic: Should I Worry About Viruses Found By My RISC PC?
Replies: 3
Views: 386

Re: Should I Worry About Viruses Found By My RISC PC?

You're unlikely to run into many RISC OS viruses written after 1997... Ideally I'd recommend running the VProtect module on all your machines - this is included on most of the newer !Boot sequences, and will at least warn you when it detects a virus (and will stop it spreading). Since you're already...
by SarahWalker
Thu Oct 10, 2019 10:20 am
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 574

Re: A confused A7000

The A7000+ was released after ART was closed iirc, so the relevant RISC OS (3.71?) doesn't have an ART banner. This machine looks to have been upgraded to 3.7, though I had thought that version could detect the ARM7500.
by SarahWalker
Wed Oct 09, 2019 6:25 pm
Forum: software: classic games
Topic: Firebug, Sorcery, Boxer and Smash and Grab...
Replies: 6
Views: 373

Re: Firebug, Sorcery, Boxer and Smash and Grab...

More likely that it's just the same basic engine recycled for each game.
by SarahWalker
Thu Oct 03, 2019 5:12 pm
Forum: programming
Topic: RISC OS Arm assembly
Replies: 3
Views: 734

Re: RISC OS Arm assembly

'Close to the hardware' coding is generally frowned upon, however if you absolutely must then the ARM2/MEMC/IOC/VIDC datasheets are at http://www.home.marutan.net/arcemdocs/ (under 'Archimedes Level Hardware'), and one of the Technical Reference manuals from http://chrisacorns.computinghistory.org.u...
by SarahWalker
Wed Oct 02, 2019 4:39 pm
Forum: hardware
Topic: A3010 General Queries
Replies: 24
Views: 896

Re: A3010 General Queries

For gaming from personal experience the A3010 seems to have the advantage over the A3020. This will especially be so if one needs joysticks to run a game. In theory games should work equally well on both machines but I have found some games work on the A3010 and struggle on the A3020 (may be that i...
by SarahWalker
Tue Sep 17, 2019 5:11 pm
Forum: hardware
Topic: Video timing on Acorn Electron
Replies: 2
Views: 235

Re: Video timing on Acorn Electron

From initial tests it looks to me like interleaved RAM access between CPU and ULA. Correct, the ULA will alternate RAM accesses between CPU and video/refresh cycles. So in a 128 cycle scanline the CPU will run for 64 cycles, resulting in 1 MHz, with 40 cycles of active display and 24 of blanking. T...
by SarahWalker
Fri Sep 13, 2019 7:38 pm
Forum: hardware
Topic: MEMC1A timeline and documentation
Replies: 9
Views: 1006

Re: MEMC1A timeline and documentation

Bit of a bump, but I've been reworking the ARM/MEMC timing in Arculator, and I feel the need to rectify my statement above that 'MEMC1a and MEMC1 w/o workarounds perform the same'. I've identified three performances differences between MEMC1 and MEMC1a systems, only one of which is the result of a w...
by SarahWalker
Wed Sep 11, 2019 1:15 pm
Forum: emulators
Topic: MAME: Click (and other large ROMs)
Replies: 106
Views: 7054

Re: MAME: Click (and other large ROMs)

Looks like it initially writes 0f to 8000 and checks if it can immediately read it back, failing if it can. Then it goes into a loop of lda 8000 / cmp 8000 / bne is_empty, ie it's testing that the value changes more over time. So for this to work you'd effectively have to return random data on readi...
by SarahWalker
Sat Sep 07, 2019 8:42 pm
Forum: archive requests
Topic: Archimedes Podule ROMs
Replies: 1
Views: 236

Re: Archimedes Podule ROMs

I've got dumps of the podules mentioned in viewtopic.php?f=30&t=17833.
by SarahWalker
Thu Sep 05, 2019 7:50 pm
Forum: emulators
Topic: Arculator podule API v1.0
Replies: 7
Views: 892

Re: Arculator podule API v1.0

In case there are multiple ICS designs, mine says '(C) BE 1992 IDE I/F V5' on the PCB, and '(C) 1993 ICS Ltd IDE1V5 3V10' on the EPROM. The IDEFS implementation also seems to be somewhat fancier than the normal bog standard one, offering partitioning and password protection among other things.
by SarahWalker
Thu Sep 05, 2019 7:46 pm
Forum: emulators
Topic: Arculator podule API v1.0
Replies: 7
Views: 892

Re: Arculator podule API v1.0

Assuming that IanS's interfaces are following what ZIDEFS thinks an ICS interface is, this is the expected memory map (from https://stardot.org.uk/forums/viewtopic.php?f=16&t=15205) : +0x0000 - 0x1FFF ROM window (2 KB) +0x2000 ROM page register +0x3000 IDE reg 0 +0x3004 IDE reg 1 +0x3008 IDE reg 2 +...
by SarahWalker
Wed Sep 04, 2019 5:28 pm
Forum: emulators
Topic: Arculator podule API v1.0
Replies: 7
Views: 892

Re: Arculator podule API v1.0

Not sure how adaptable ZIDEFS is; ideA (or at least the podule I own) has a somewhat different memory map to the modern IDE podules. As does the RISC Developments podule.
by SarahWalker
Tue Sep 03, 2019 7:52 pm
Forum: emulators
Topic: Arculator podule API v1.0
Replies: 7
Views: 892

Re: Arculator podule API v1.0

If a suitable podule with the correct address map supporting 4 drives is written, yes. That's not really a function of the API though.
by SarahWalker
Tue Sep 03, 2019 7:24 pm
Forum: emulators
Topic: Arculator podule API v1.0
Replies: 7
Views: 892

Arculator podule API v1.0

I've posted below the podule API currently implemented by the in-progress next version of Arculator, should anyone be interested (I think this is most likely to be flibble and possibly Phlamethrower); it would be nice if this could be used cross-emulator/platform. I think I'm unlikely to change much...