Yes, you can… we’ve all been doing it for years and years :)
Don’t compare it with the Amiga’s Copper lists though, that’s a much more versatile and complex way in their hardware to do it.
On the Sam, you have to make use of setting line interrupts to trigger an interrupt at given scan lines (OUT 249,value) and have your interrupt routine change what you want … e.g. screen mode, palette colours, screen memory page…
(If you are into assembly language, I put a piece of code in the letters page in Sam Revival 13 showing how to do it quite simply, in reply to someone’s question.)
Colin
=====
Quazar : Hardware, Software, Spares and Repairs for the Sam Coupe
1995-2007 - Celebrating 12 Years of developing for the Sam Coupe
Website: http://www.samcoupe.com/
Re: Stop the press...
Yes, you can… we’ve all been doing it for years and years :)
Don’t compare it with the Amiga’s Copper lists though, that’s a much more versatile and complex way in their hardware to do it.
On the Sam, you have to make use of setting line interrupts to trigger an interrupt at given scan lines (OUT 249,value) and have your interrupt routine change what you want … e.g. screen mode, palette colours, screen memory page…
(If you are into assembly language, I put a piece of code in the letters page in Sam Revival 13 showing how to do it quite simply, in reply to someone’s question.)
Colin
=====
Quazar : Hardware, Software, Spares and Repairs for the Sam Coupe
1995-2007 - Celebrating 12 Years of developing for the Sam Coupe
Website: http://www.samcoupe.com/