Who is Roger Jowett

[arnoldemu]

From old-computers:

"YouTube

please help
trying to convert 8bit video for sam coupe
this is still not mode 3 interlaced with hmpr bit 5$6 CLUT alterations per scan line HELP we only need a DMA...
masterdos/basic atom lite support HELP"

Possible translation:

"YouTube

please help.

I am trying to convert 8bit video for sam coupe.

If you use mode 3 interlace and set bit 5&6 of "hmpr" register, and do CLUT alterations per scan line this could be possible and make a good result. But I need help to make this possible..

Could we use a hardware DMA to make this a reality?
Can anyone help me to use  masterdos or atom lite interface (not atom lite+)?"

atom lite is a cf/ide interface for sam. advanced version is called "atom lite+". So "basic atom lite" is the less advanced version.
CLUT is "colour look up table". It means modifying the palette registers, changing the colour for a pen.

mode 3 on sam is 512x192 linear framebuffer, 2 bits per pixel (4 colours).
"All modes are paletted, with a 16-entry CLUT selecting from a palette of 128 colours. "

hmpr is "high memory page register".

bit 5 and bit 6 control part of the colour look up register addressing, "only available in mode 3".

It is not garbage and not machine generated.

it's ramblings, it's deep understanding of the sam hardware which we lack.

all he's saying, is, "using this mode, and changing the colours over the screen we could achieve close to a 256 colour mode", it may not be possible without hooking up a DMA to write changes more quickly.

When he puts HELP on the end of a line, it is not clear to me if he is asking for help, OR he is saying "I can help here".

Look on youtube, it's got a video he made showing part of this idea already working.


Roger is a real person!

[Gryzor]

Real people can copy/paste too, you know


I've also had communications with him in the past, so I'm fairly sure it's not a bot. Either that or the Turing test got busted.

[TFM]

But you think that I'm real too! Honestly I'm just a program running on an old CPC with 4 MB RAM, HD20 hard disc and a CPC-Booster+ to access the forum. 

[Devilmarkus]

But you think that I'm real too! Honestly I'm just a program running on an old CPC with 4 MB RAM, HD20 hard disc and a CPC-Booster+ to access the forum. 

The unreal real TFM

[TFM]

The RTFM.... yes... unreal tournament coming soon 
 
 
 
EDIT: Haha, guess I hijacked this thread 

[khisanth]

I love the fact that amongst the technobabble he said "eggnchips"   

[Gryzor]

That... Was...a blast from the past, I guess [emoji23]

Sent from my HTC 10 using Tapatalk

[khisanth]

Well he appeared on the ZX Spectrum Next Facebook group demanding hardware specs even though they are available on the website!

[Gryzor]

Ehehe! Send them here

[khisanth]

Someone else already did, few people have looked already!  He has pestered a bunch of people there too, many had to block him.