search

jotego / jtcores

FPGA cores compatible with multiple arcade game machines and KiCAD schematics of arcade games. Working on MiSTer FPGA/Analogue Pocket
https://patreon.com/jotego
GNU General Public License v3.0
228 stars 40 forks source link

s18: mwalk brightness too high #734

Closed SumolX closed 2 months ago

SumolX commented 2 months ago

Almost all cores have similar levels except for moonwalker. The brightness needs to be turned down on my arcade crt cabinet by a significant amount. Alien Syndrome looks perfect for reference.

IMG_5960

jotego commented 2 months ago

How about the other s18 titles?

SumolX commented 2 months ago

Just tested all s18 titles and they all exhibit this issue.

jotego commented 2 months ago

This is the core output captured in simulation. The brightness is correct:

frame_01438

What happens in your screen is that the reference level is not being captured correctly. This is likely due to the peculiar video timing of this system. This causes synchronization problems to several users (see #692). In your case, your TV set can synchronize but with incorrect brightness and probably incorrect colors too.

So far, there is no solution for this from the core side. We may work on a tweak (#729) that will likely fix this for you at the cost of slightly different gameplay/music speed.