For some people here, this might be old news. This topic is specifically directed at those who haven't heard of it yet. As it appears, this has been around for quite some time but still hasn't entered common knowledge yet. Let's change this!
I was browsing the good old cave-stg forum and found this thread. To quote the forum user "el_rika":
CPU alone will get the major sources of slowdown, blitter will help smooth it out. Using both of these, we are able to tweak the slowdown so that it's almost arcade perfect. The results are absolutely stunning! We are talking about 95%+ slowdown accuracy!el_rika wrote:There are two kinds of slowdown that occur in a cv1000 game:
1. CPU dependant
2. Blitter dependant
The job now is to look at PCB footage and tweak the slowdown as much as possible. The user "Pearl" is working closely together with players of the respective games and has achieved great results. Our findings are summarized as follows (tested under Mame 0.219):
Code: Select all
Mushihimesama: 37.6% cpu, 56% blitter
Pink Sweets: 37.2% cpu, blitter off
Ibara Black Label: 50% cpu, blitter off [still in progress!]
Please play around with the numbers yourself and tell us about your results! Figuring out the best settings for each game is a huge undertaking and can only be achieved as a community effort.