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Was there ever auto detection on Archimedes (A3xx, A4xx, A3000) machines? Wasn't that only added in the later machines with the "native" 15pin VGA connector instead of the old 9pin RGB? In 9pin world, I think there are no ID pins specified. Very true, it's only some of the machines which supported ...

What does RISC OS 3.1 do if it does not detect the RTC/CMOS chip on the IIC bus? App note 255 suggests that it should refuse to boot with a POST error flashed out on the floppy LED. So, there's a good chance that the MIST is providing some form of RTC+CMOS emulation - but perhaps not one that provi...

Is anyone else seeing this pop up every 20 seconds or so when composing messages? For me it pops up even if I haven't made any changes to the message since the last time it popped up, which I find really annoying because it causes everything underneath the post (e.g. the other messages in the thread...

Can I also presume that Disc Error 23 does not occur on A7000/RiscPC, meaning all the compatibility issues are resolved by Jeffrey's beta ROMpatch , or the patcher in the OP? Jeffrey's updated ROMpatch should be used in preference, as it hangs off TickerV instead of stalling the CPU. Just posting a...

How can you change the MonitorType without rebooting? *Configure MonitorType changes both the CMOS setting and the live value that's used by the OS. The next mode change will use the mode definitions for the new monitor type. Oops - are you absolutely sure? I tried that (using both *configure and !...

submitted patches have gone ignored Sure looks that way! Over ten years ago I found a couple of bugs and submitted some patches (or at least I hope I did). It looks like one of them (fix RND(N) to return numbers in the range 1 to N) has made it in to your version, but the other one hasn't. In filei...

How can you change the MonitorType without rebooting? *Configure MonitorType changes both the CMOS setting and the live value that's used by the OS. The next mode change will use the mode definitions for the new monitor type. how does RISC OS handle the letterboxing in VGA/SVGA monitortype? Is it c...

Unfinished Minix port to the A310.

http://ftp.uni-stuttgart.de/pub/systems/acorn/minix/

And, a £100 competition to see if anyone can get it running.

https://virtuallyfun.com/wordpress/2018 ... arm-minix/

Yep, ColourTrans is the way to go. You just need to make sure you use the right flags to get the best output.

https://www.riscosopen.org/forum/forums ... osts-32646

(The example I give there is ColourTrans_GenerateTable, but for sprites ColourTrans_SelectTable will work exactly the same)

Nice work! It's another thing to add to my list of "things I need to fix ArcEm to work with". Amazing to see this machine display palettes like this on screen for the first time (as far as I know!). The Symposium '96 intro also does "interesting" things to the hardware in order to create a high-colo...

One thing to be wary of with CLib (and some other important modules like FPEmulator) is that it's possible to build the module optimised for different CPU or OS versions. If you try running a copy of the module on a machine which is incompatible with the build configuration then assorted Bad Things ...

flibble wrote: ↑

Fri Jun 22, 2018 8:20 pm

I am not in favour of any sort of podule DLL api

1) The API is windows only, the emulators are not.

I should have probably been clearer - I was just using "DLL" as shorthand for "whatever dynamic code loading system is appropriate for the host platform"

With the PiPOD there's no electrical connection between the Pi and the "host" computer (except possibly power?). All the communication between the two is via ethernet. I'm not sure what the software is like - the PiPOD falls into the "completely pointless" category for me. It's essentially the equiv...

On reset, MEMC maps the ROM to &00000000. The ROM code then performs a magic handshake to restore it to normal behaviour.

(See section 5.4 of the MEMC manual - http://www.home.marutan.net/arcemdocs/)

Hot-swapping hard discs isn't something the OS was designed to cope with, but you could probably get it to work if you *dismount each drive before unplugging it. Possibly also a *RMReInit of the filing system module (e.g. ADFS) after inserting the new drive.

Just looking into the possibility of an IDE to USB adapter. Not sure whether Risc OS on the Raspberry Pi would support a drive of this age though (170mb Conner). I had read that it only supported newer drives, but I am just trying to find where I once read this. Possibly this thread? https://stardo...

From my perspective, it would have be nice to have the API defined, so that if/when I eventually add podule support to ArcEm I'd be able to implement support for it there. But since that's likely to be at least a year or two away, I do agree that if no other emulator developers are interested in imp...

Call me crazy, but it would be nice to have an emulator-agnostic "podule emulation API" so that once a podule emulation has been written for one emulator, it can be used with another emulator just by copying the precompiled podule DLL and a few configuration files to the right location. I'd hope tha...

I thought foreground transfer lists had no terminator? You have to rely on the transfer length in R4.

not checking for size=0 when looking for the end of the scatter list. That's probably the safest approach. In the PRMs, the diagram showing the scatter list structure does show that the address should be negative and the length should be zero - but then in the text below when they describe how to d...

Possibly you've seen this thread on the ROOL forums asking about evidence of US sales - maybe there are some other documents on the CD which would be able to help with that?

https://www.riscosopen.org/forum/forums/5/topics/10863

Alpine Linux is a good choice if you don't want gigabytes of bloat in your final images. https://hub.docker.com/_/alpine/ At work we typically use a two-stage process - one docker container which does the build, and another which the compiled binary gets copied into (which generally requires the bin...

I'm not sure how to tell the difference between flash & non-flash Kinetic cards. But yes, if you were to flash it with RISC OS 5 then that's what it would boot into. Just remember that you will lose the ability to run 26bit-only software, including podule drivers if there aren't 32bit versions of th...

1bpp, 2bpp, 4bpp, and sometimes even 8bpp modes aren't supported by most modern video hardware. The OS doesn't contain any support for emulating missing colour depths, so when asked for a low-bpp mode the OS just substitutes it for a similar higher-bpp one (e.g. mode 0 may get replaced with mode 15 ...

Looking at the CDs I have, the first (and only?) Archimedes World CD contains coverdiscs from February 91 to April 94. However it's not just a simple set of archives of the floppy contents - they've reorganised everything by program/article. Possibly some programs are missing (there's a cover disc i...

Money is not really my main interest here! However I want to redevelop a game which has been a labour of love for many previous years, but I'm 38 now with little finances and wanted to work more or less full time crowdfunded to get an Acorn 32-bit game finished, with physical copies which will also...

As someone who's read a lot of technical documentation over the years but has never managed to get his head around the ADFS/filecore format, here are my thoughts: A picture is worth a thousand words! Good diagrams might be a pain to create but they're well worth it in terms of aiding comprehension. ...

Other people have reported succes with SA-machine drives. Possibly because later machines used a different version of FileCore (long filenames, greater capacity etc)? I don't think it's the disc format that's the issue -the same version of FileCore is used across all RISC OS 5 machines, and nobody'...

(e.g. the ARMX6 looks like it's configured for 320x250 in 16 colour, which the hardware most certainly can't support) I didn't actually test with 6502em, but that was the problem preventing regular mode 7 from working. My changes didn't quite make it in in time for the nightly builds, but I've now ...

I think this is an OS bug with the ARMX6 - I'll look into it tonight. Traditionally teletext has been 320x250 (with an 8x10 font), but for RISC OS 5 a "high-res" option was added which uses a 640x500 mode (16x20 font). An option was also added for the high-res version to use a 256 colour mode instea...