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 Post subject: PC-FX RGB mod
PostPosted: April 23rd, 2008, 1:10 pm 
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Joined: November 8th, 2007, 2:31 pm
Posts: 20
Location: Tokyo, Japan, Earth
[Topic renamed from: "PC-98 + SCSI CD-ROM + File Slot Installation Problem"]

Finally started touching my PC-98 again. Got DOS 6.2 up running fine and config.sys/autoexec.bat all setup correctly to give optimal amounts of memory. The problem is that the PC can't find the CD drive. The correct driver is being used (NECCDA.sys) but this PC uses a file slot interface meaning it needs a PC-9821A-E10 SCSI card which fits into the back in a file slot. I'm assuming this needs a driver as well (I guess it isn't ATAPI, ASPI perhaps?). I've looked around on JP sites but haven't seen anyone specifically come across this issue with CD-ROM installations. Would appreciate any help so I can finally try out Policenauts and this PCFX-GA.


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 Post subject:
PostPosted: May 7th, 2008, 1:40 am 
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Joined: November 8th, 2007, 2:31 pm
Posts: 20
Location: Tokyo, Japan, Earth
Mods, please close this topic.


After much research and talking to some people on Oshiete Goo, it led me to the right answer. I was able to install Policenauts and Ultima 8 fine (although I had to rename the CD driver file so the Policenauts install program would pick it up and format a floppy as 1.44 since I use DOS 6.2). Also, used the PCFX-GA for the first time. Really sad that it doesn't have RGB output and only S-Video.


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 Post subject:
PostPosted: May 7th, 2008, 1:58 am 
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Joined: May 16th, 2007, 7:08 pm
Posts: 861
Really offtopic:

The PC-FX uses an updated VCE(HuC6261) like the one in the PC-Engine(HuC6260). It should be possible to grab RGB from the chip (on the PCE it outputs both RGB and Composite from this chip).

There exist a RGB mod for the PCE, and using that as a base you can construct any video mod you want (S-Video, Composite, Component, etc.)

If you feel like experimenting, check this page for more info about it.


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 Post subject:
PostPosted: May 7th, 2008, 5:18 am 
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Joined: November 8th, 2007, 2:31 pm
Posts: 20
Location: Tokyo, Japan, Earth
wushu wrote:
Really offtopic:

The PC-FX uses an updated VCE(HuC6261) like the one in the PC-Engine(HuC6260). It should be possible to grab RGB from the chip (on the PCE it outputs both RGB and Composite from this chip).

There exist a RGB mod for the PCE, and using that as a base you can construct any video mod you want (S-Video, Composite, Component, etc.)

If you feel like experimenting, check this page for more info about it.



I've done the RGB mod before (have it in a SuperGrafx actually) but for FX, the chip doesn't seem to output RGB in the same place.

http://hp.vector.co.jp/authors/VA007898 ... C6261.html

This page details how there is no RGB out values, just YUV. I'm assuming the chip itself is doing the conversion.


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 Post subject:
PostPosted: May 8th, 2008, 6:04 am 
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Joined: May 16th, 2007, 7:08 pm
Posts: 861
Perfect. If you really feel like modding away..

http://elm-chan.org/works/yuv2rgb/report.html


Specially you should look (if you are into electronics):

http://elm-chan.org/works/yuv2rgb/yuv2rgb3.png


Read that page. Maybe you can even fit all that inside the PCFX. Is there enough space inside?

Tell me what you think.


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 Post subject:
PostPosted: May 8th, 2008, 9:27 pm 
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Joined: June 23rd, 2007, 10:34 pm
Posts: 485
Location: You know
No need to close the topic, I prefer moving it to Other Emulation.


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 Post subject: Re: PC-FX RGB mod
PostPosted: December 24th, 2015, 10:58 pm 
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Joined: September 15th, 2014, 10:01 pm
Posts: 20
Hm. I'd like to try a component out mod. Unfortunately there is no pinout info for the HuC6261.

Here's a translated version of a previously posted page
http://daifukkat.su/pcfx/data/HuC6261.html

There's nothing about specific hardware pins though.


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