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what is UA6528P
by krzysiobal on 2015-11-21 (#159477)
According to the diagram:
there are known 2 types of CPU: UA6527P (PAL), UA6527 (NTSC) and 2 known types of PPU: UA6528 (NTSC) and UA6538 (PAL).
However, there is also UA6528P available - for example on aliexpress: What is that?
Re: what is UA6528P
by tepples on 2015-11-21 (#159485)
That's not for 60 Hz PAL such as Brazil's PAL/M, is it? If it is, I'd bet l_oliveira would know, as he tested my overclock ROM on a bunch of different configurations.
Re: what is UA6528P
by Snacks on 2015-11-26 (#159720)
famiclones from argentina uses this IC
Re: what is UA6528P
by tepples on 2015-11-26 (#159740)
Argentina uses PAL-N, combining the lower subcarrier frequency of PAL-M with the 50 Hz scan rate of regular PAL. I guess I eventually need to add a test to my overclock demo telling which scanline NMI is on. What games work on it?
Re: what is UA6528P
by tepples on 2018-07-17 (#221354)
Over the past few years, did anyone ever get a chance to run 240p Test Suite on an Argentine chipset? Its CPU clock speed test, the successor to the overclock test, has an NMI scanline indicator.