I bought a USA NES with a broken PPU. I replaced the PPU with a UA6538 PAL PPU. Lifted the 18. pin (CLK) and connected to a homebrew 26,6Mhz oscillator. It worked fine in 50Hz. Then i got a UA6548 PAL-M (PAL60) PPU and changed to it. It works in 60Hz with very ugly scanlines, strange colors.
Is there anyone knows what makes this problem?
I have some famiclones with NOAC chip whith 26,6Mhz xtal and jumpers. When i short only one jumper it works in 60Hz with that same ugly scanlines but if i short every jumpers it works fine.
Is there anyone knows what makes this problem?
I have some famiclones with NOAC chip whith 26,6Mhz xtal and jumpers. When i short only one jumper it works in 60Hz with that same ugly scanlines but if i short every jumpers it works fine.
Statistics: Posted by Gabe — Mon Sep 23, 2024 11:31 am — Replies 0 — Views 89