Is the VDP in transparent mode as fast as in normal mode?
transparent mode is fast as any other logical copy i.e. like a (dead) snail
on the other side, fast copy is limited to bytes, so, in sc5, you cannot use it when x
coordinate is odd, or the x coordinate is even but the width is odd
even worst in sc6, where you need x be multiple of 4
Today I ported the device manager module to the MSX successfully with the exception of the RTC. Does anyone have a hint, what is the easiest way to detect a present RTC?
Currently I don't know, if there is any standard proportional mouse for the MSX available. Any hints here?
time depends on the active screen and on the orizontal width of the block
(and on the refresh rate 50/60Hz and on the sprite active and on the moon phase..)
given the screen and the logical operation,
a 16x4 block is faster than a 8x8
you can assume a formula like
T = a* dx*dy + b*dx
where a and b depends on the screen mode on the logical operation
Yes, I saw the test results on this page, I just don't know, what kind of blocks he filled/copied.
For proportional text output I will need to copy (logical) single W x 8 blocks for each char, where W is between 1 and 8. I am sure, normally you would use byte copy, if the text is not proportional, so I wonder, if in my case it won't be too slow at the end.
transparent mode is fast as any other logical copy i.e. like a (dead) snail
Hm, any idea how many micro seconds it (more or less exactly) takes to copy a 8x8 pixel block inside the VRAM with logical copy?
good enough just for typing and showing littles sentences at a time....
very slow for re-drawing all a window at a PAINT event
the vdp allow to do scrooling by itself so that helps, but clipping at the same time is a lot of work for only the CPU taking including seconds to do that.
a fast way is prebuffering but that eats a lot of RAM but it is clean, easy and faster.
good enough just for typing and showing littles sentences at a time....
very slow for re-drawing all a window at a PAINT event
Hm, bad news. Maybe I should prepare a line of proportional text in the CPU memory and copy it with "vram write" or the "highspeed put byte" command into the vram? Did someone already write a fast proportional text output routine? Just want to know, if it is somehow possible...
