simon wrote:Great.
Are you making progress with the V9990? I like it pretty much but it has it's disadvantages...
Lately I am still a bit lazy but read about programming gfx effects. I wonder how much use one can get by using the blitter. It is very fast but not that advanced as the Amiga blitter. BTW my advice is to add direct VRAM access for the CPU. This simplifies framebuffer usage and should speed it up as well. Especially if the CPU is 16Bit.
Simon
Excellent, so we can expect some great c64 type demo's soon?
![Surprised :o](./images/smilies/icon_e_surprised.gif)
I'm still laying out the main processor and memory interfaces so haven't actually done anything with the chip so far.
I have nearly completed the pcb layout for the 68000, 2 x 8 bit 128KB flash memories , 16MB 72pin simm and glue, its tough routing all those signals on 2 sides only, I can see how it took you a week just to decide where the components went on the pcb. I have rerouted at least 6 times so far and it is only 10 chips! I hope this time is the last, it seems to be flowing nicely.
I was thinking of putting a slot on the pcb for a video adapter so I could make a V9990 card or a tms34010 card but will definately consider the direct addressing of the vram into the ram space for the V9990, although bus sharing with the V9990 may be tricky, do you have any application notes showing best practice for doing this?
I also need to read up on graphics processing.
Chris