Re: Apple II VGA Video Generator Card Project

[bieling@terra.es]

>BTW there is no need for dual ported RAM: 500 nS out of every 1 mS 6502
>does not acess the memory. That's how the normal Apple video works.
>Using modern SRAM it is trivial to read 4 bytes in 500 nS (double scan
>rate AND double hi-res or 80 columns).

Yes you're right. But as you can't modify the Apple II timing this
complicates the access to the RAM from the side of the video generator.
If it were not because dual-ported RAM seems to be so much more
expensive. Still, it may fit in the fpga in the form of ip. I believe
it would ease the things a lot.