25 July 2008, 04:03 | #1 |
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Join Date: Sep 2004
Location: Tacoma, WA USA
Age: 52
Posts: 1,927
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Overclocking Picasso IV?
I finally got my Picasso IV and was trying to remember how to overclock it via the tool types. I set the tool types via the PVS Prefs tool and it still shows 80.5MHz. It's been about 10 years since I had one and vaigly recall I had to do a work around to actually get it to overclock. (Hex edit the monitor file?) On my CV64 I had no problems. I am using the Picasso 96 RTG system. Anyone know how?
Board 0: PicassoIV Chip: Cirrus Logic GD5446 DAC: Cirrus Logic GD5446 (intern) RegisterBase: 0x40600000 MemoryBase: 0x41000000 MemorySize: 4161536 BitsPerCannon: 6 This board supports: following rgb formats: PLANAR CHUNKY R5G5B5 R5G5B5PC R5G6B5 R5G6B5PC B8G8R8 hardware sprite, software sprite buffer, planar and chunky memory exclusive, hardware vblank interrupt can be caused, User selectable flags: overclocking enabled, memory clock set to 80.5 MHz, big sprite used, soft sprite in mode depth 4, 8, 15, 16, 24, 32, system borderblank used, board is part of the display chain, |
25 July 2008, 05:25 | #2 |
I hate potatos and shirts
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Editing the video modes via P96 settings?
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03 August 2008, 16:57 | #3 |
Quite the odd one
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If you don't have a very particular need for increasing the speed of the Picasso IV (which I find hard to believe, given the applications available for such a system), I would urge you to seriously consider leaving it at stock speed. However intriguing the challenge, wouldn't it be like adding fuel injection to a Ford model T and risking damage in the process?
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03 August 2008, 17:17 | #4 |
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Location: finland
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Didn't it give 10 MHz more to the max pixel clock, 85 =>95 and 135 =>145 MHz?
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05 October 2018, 15:04 | #5 |
Guru Meditating
Join Date: Jun 2014
Location: England
Posts: 2,355
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Sorry for necro’ing an old thread, but is that how you overclock the pixel clock - edit the picasso96 settings file in a hex editor?
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05 October 2018, 19:01 | #6 |
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Join Date: Mar 2004
Location: finland
Posts: 1,841
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Tick Overclock in PVS - can't say with which cards it does work. My faint memory with my tries was getting fluctuating pixels so the benefit was small.
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