Not really. You mean the old DMA of the B/W gameboy. On the GBC it stops the
CPU for sure.

Chris
Gameboy Lead Programmer
Software2000

-----Ursprüngliche Nachricht-----
Von: Giovanni Bajo [mailto:bagio@...]
Gesendet: Dienstag, 1. August 2000 11:18
An: gbadev@egroups.com
Betreff: RE: [gbadev] DMA dilemma!


>
> GBC halts when doing General Purpose DMA.
> And HBlank DMA in h-blanks.

Not really. If you look at a standard DMA routine on GBC, it is copied to
$FF00-$FFFE because that's the only area of RAM still readable (and
executable) WHILE DMA is in progress. Tipically, there is a short loop there
to allow DMA to complete its execution.

> It's faster than creating a copy loop.

This could be useful on GBC, but I don't think that speed in memory xfer is
a major problem on AGB.

---
Giovanni Bajo
Lead Programmer

Protonic Interactive
www.protonic.net

a brand of Prograph Research S.r.l.
www.prograph.it





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