|
|
Atari coding BBS
| Re: STE stable fullscreen |
|---|
|
Posted by: Troed
|
Sep,02.2015-11:41
|
I think it's important to try to have a consistent terminology here, but I'm not claiming to be authorative.
ST wakeup states: GLUE/CPU offsets (4 in total) - can be detected via software. These influence at which cycle you need to change registers. These are _fixed_ at boot and won't change with heat or clock migration or whatever you could think of.
ST & STE "Shifter modes": Offsets between GLUE+MMU & Shifter, or GST-MCU & Shifter, that influence several things. The most common being "banded screen" (known as every 16 pixels black, more information in my talk to come at STNICCC) and "striped horisontal lines" etc.
- the "striped horisontal lines" effect is due to the Shifter registers not being cleared and then next line then starts at a different position or is bitmap shifted etc. Is this what you mean with unstable lines? If so, then yes, even on STE this can happen and it's also a migratory state which means it can change during a single power on. Imagine this as the Shifter still being able to clear its registers everyone line even though your 186 byte lines are not divisable by 4 when the machine is "cold" - but when its "warm" it sometimes fails to clear all the words in the registers.
(I believe "Spectrum 512 dots" to be due to MMU/GST-MCU & Shifter desync in the rotation registers 32MHz clock vs the clock running LOAD, yet another cause and effect. This _might_ be a fix state set at boot. I hope to have time to present more info on this as well at STNICCC ... )
FWIW. I've never tried using STE hwscroll while manipulating line lengths so I don't know which of all these things match your "unstable" effect :)
/Troed
|
[All messages in this thread] [Start new thread]
|
Topic
|
Posted by
|
Date
|
|
STE stable fullscreen
|
Leonard
|
Aug,26.2015-16:10
|
|
Re: STE stable fullscreen
|
Patrice Mandin
|
Aug,27.2015-16:45
|
|
Re: STE stable fullscreen
|
evil
|
Aug,27.2015-18:07
|
|
Re: STE stable fullscreen
|
Leonard
|
Aug,27.2015-18:19
|
|
Re: STE stable fullscreen
|
evil
|
Aug,27.2015-18:38
|
|
Re: STE stable fullscreen
|
Leonard
|
Aug,28.2015-09:26
|
|
Re: STE stable fullscreen
|
evil
|
Aug,28.2015-10:27
|
|
Re: STE stable fullscreen
|
Patrice Mandin
|
Aug,28.2015-18:43
|
|
Re: STE stable fullscreen
|
Leonard
|
Aug,28.2015-20:55
|
|
Re: STE stable fullscreen
|
Patrice Mandin
|
Aug,29.2015-10:17
|
|
Re: STE stable fullscreen
|
Leonard
|
Aug,29.2015-10:23
|
|
Re: STE stable fullscreen
|
Patrice Mandin
|
Aug,29.2015-15:42
|
|
Re: STE stable fullscreen
|
Bod/Effect
|
Sep,29.2015-16:53
|
|
Re: STE stable fullscreen
|
Troed
|
Sep,02.2015-11:41
|
|
Re: STE stable fullscreen
|
Troed
|
Sep,02.2015-12:08
|
What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
|
