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Improving MSX-DOS2 ISR
Score: 157.81 %,
Type: Forum topic , Comments: 0 comments
I was thinking about that on computers plenty of RAM the ISR and its BIOS accesses could be improved. The "driver" process would be like:
- Reserve a segment as system.
- Clone BIOS into that segment.
- Modify MSX-DOS2 38H called ...
OTIR strange behavior, does not allow to modify HL
Score: 157.54 %,
Type: Forum topic , Comments: 1 comment
Well, I want to make a copy in a row from different sources, if I do this:
set HL, DE, C values
ld b, SIZE
otir
add hl, de <- THIS ONE IS IGNORED, EVEN IF I DO LD HL, 0
ld b, SIZE
otir
But if I do:
set HL, DE, C values
ld b, SIZE - 1 <- NOTICE DIFFERENCE
otir
outi
add hl, de ...
VDP access preventing interrupt triggering?
Score: 157.65 %,
Type: Forum topic , Comments: 4 comments
interrupt request from VDP will canceled when the register status 0 or 1 will be read.
DarkSchneider ... DIs), it only stops when VDP status register 0 is read (for vblank int) or status register 1 (for hblank ...
Why MSX-Music uses YM2413 instead YM3526?
Score: 157.42 %,
Type: Forum topic , Comments: 1 comment
I wonder why YM2413 was used as FM-chip for MSX instead YM3526. Thinking about it, I found this article:
https://www.faq.msxnet.org/fmpac.html
That thinks like me, why to launch another FM chip and create incompatibility, dividing developers ...
