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 Post subject: what is UA6528P
PostPosted: Sat Nov 21, 2015 3:34 am 
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Joined: Sun Jun 12, 2011 12:06 pm
Posts: 450
Location: Poland
According to the diagram:
Image

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?
Image


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 Post subject: Re: what is UA6528P
PostPosted: Sat Nov 21, 2015 8:57 am 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20896
Location: NE Indiana, USA (NTSC)
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.


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 Post subject: Re: what is UA6528P
PostPosted: Thu Nov 26, 2015 12:40 am 
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Joined: Mon Feb 04, 2013 10:47 pm
Posts: 21
Location: Chile
famiclones from argentina uses this IC


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 Post subject: Re: what is UA6528P
PostPosted: Thu Nov 26, 2015 7:50 am 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20896
Location: NE Indiana, USA (NTSC)
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?


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 Post subject: Re: what is UA6528P
PostPosted: Tue Jul 17, 2018 2:22 pm 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20896
Location: NE Indiana, USA (NTSC)
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.


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