On Sat, 22 Apr 2000 18:51:09 -0300 (ADT), Daniel Jorge Caetano wrote:
> BTW, use LDI e OTI are usually better, when working on video, than
>OTIR and LDIR... But remember: OTIR is the same speed as LDIR *inside*
>de Z80. And on MSX, every OUT, specially for VDP, receives some Waits...
>and so, on MSX OTIR to VDP is slower than LDIR to VDP.
I made a mistake as Ricardo has advised me. LDIR is really the same speed
than OTIR (only TR add waits here), but if you use OTIR to VDP at the same
speed as LDIR to ADVRAM, on TR Z80 and normal MSXs, in some cases you can
hang your computer (yes!!! there is really the need for waits on this
OUT, and no one set them up!) Ricardo has done a program to test speed
that locks the Z80 MSXs... (-;
BTW, using OTIR on R800 mode is, usually, slower than on Z80 mode (!!!!)
Abra�OS/2, Daniel Caetano ([EMAIL PROTECTED])
...!m.tag
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