BIOS Questions

General information to do with the PlayStation 1 Hardware. Including modchips, pinouts, rare or obscure development equipment, etc.
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rorysl
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What is PSXDEV?
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Joined: March 17th, 2020, 11:33 pm

BIOS Questions

Post by rorysl » March 18th, 2020, 12:23 am

Hi all, this is my first post -- I have a PSx SCPH-1001 and SCPH-5501. I've read through the thread here on swapping BIOS chips and it's definitely something interested in and I'm sure I'll be chiming in on that thread soon. But before I do, I wanted to post this thread and see if I can better understand the different BIOS versions.

From my understanding:

NTSC-U/C - The NTSC bios across all versions is the colourful rainbow version, yes? And Soundscape was added in versions 700x+?

PAL - The PAL bios was the grey blocky version and the CD Player featured different sound options (Dome, Hall, Church, Studio, Direct) -- if I'm correct on that, was it across all versions??

NTSC-J - Which Bios did this feature? The colourful or the grey? If the colourful was Soundscape likewise only added after version 7000

Am I correct on the above? If not, can anybody give me some more info? Thanks in advance!

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