17
votes
Accepted
Z8410 DMA chip as GPU?
I've been thinking about something like this myself, recently. I wasn't planning on using a Z8410, though, but an Intel 8257-5. This has a number of advantages:
It has 4 controller channels rather ...
- 12.8k
17
votes
Z8410 DMA chip as GPU?
It has been already done for ZX spectrum.
see Velesoft: DATA-GEAR
It has DIL40 socket compatible pins at the bottom and it replaces Z80 (so the bus is as short as possible). According to that site ...
- 7,152
11
votes
Z8410 DMA chip as GPU?
Pushing large chunks of bytes around is actually a task a DMA chip is very good at.
The point is:
Pushing partial bytes around is a task a DMA chip doesn't help sooo much, there is a lot of the job ...
- 32.4k
8
votes
Accepted
Breakeven number of bytes for programmable DMA
each DMA transfer must be programed so you need to set some I/O registers of the DMA chip like:
BYTE DMA mode
WORD source address
WORD destination address
WORD block size
These are usually send by ...
- 7,152
8
votes
Z8410 DMA chip as GPU?
Is it possible that you're using the here the term 'blit' as in Bit-Blit? If yes, than it's inaproptiate, as your examples are only about moving (byte) data. Moving is just one function of a bit blit ...
- 208k
Only top scored, non community-wiki answers of a minimum length are eligible