Monday, 9 May 2022

Re: [Rpcemu] Strange colour change

In article <59e577e956j.mccartney@blueyonder.co.uk>, I
<j.mccartney@blueyonder.co.uk> wrote:

> I've recently started to create slide shows on my ARMX6
> using !OHP.

> I've created a looping slide show with just 3 images;
> they're all purely vector diagrams created in ArtWorks.
> I've set the background colour to be a light grey (73.3%
> each of R, G and B).

> I zipped up the slide show and transferred it to RPCEmu
> on a Win10 laptop. It ran but the background colour was
> wrong. It looked a sickly shade of yellowy-green with the
> following values. R: 79.7%, G: 79.7% and B: 26.6%.

> The only true colours were the black and the dark grey
> (RGB each at 20%).

> I tried the same file on RPCEmu on another laptop running
> Linux Mint and also on a desktop PC running Mint. It was
> the same result each time.

> I also tried it on VRPC on a Win10 PC and this time the
> colours were correct.

> I don't know whether it's down to !OHP or RPCEmu or some
> strange interaction between them.

> Anybody got any ideas?

I'm not sure that I have a correct idea but I might have
accidentally found a possible explanation. I'll need
someone with more technical understanding to either confirm
my suspicion or tell me I'm incompetent. The queue for the
latter starts behind my wife.

I carried out the reverse process today - create a
slideshow on the Laptop with RPCEmu and then zip it up and
transfer to the ARMX6.

When I tried to run the slide show, I got a familiar
message, "Application may have gone wrong..." On clicking
on Describe it said, "Code runs too low".

Is this something to do with low- and high-vector ROMs?

How can I check which kind of ROM is in RPCEmu (using the
current stable ROOL build)? I'm fairly sure that it's a
low-vector ROM in the ARMX6.

John

--
John McCartney
j.mccartney@blueyonder.co.uk

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