Bios-D/GD-Rom question

Naomi & all other arcade tech questions forum
OldFoo

Post by OldFoo »

Play Nicely Children :smt006
OldFoo

Post by OldFoo »

joshua3dg wrote:But here's the thing: Isn't 21577D a version after 21576G? Isn't the bios he has supposed to be compatible with the GD setup?


D is not later than G



21576 = Japan BIOS

21577 = USA BIOS



The letter is the Revision



So USA - D = Not compatiable with GD-ROM

You need USA - E or higher, which equates to 21577E
OldFoo

Post by OldFoo »

dj_johnnyg wrote:Play Nicely Children :smt006


But, Mooommm...
OldFoo

Post by OldFoo »

AndyGeezer wrote:D is not later than G



21576 = Japan BIOS

21577 = USA BIOS



The letter is the Revision



So USA - D = Not compatiable with GD-ROM

You need USA - E or higher, which equates to 21577E
I see. I was looking more at the numbers than the letter designation (21577>21576).

Thanks for the clarification. :smt023
OldFoo

Post by OldFoo »

You is my young apprentice, soon you'll be master of the tech forum.



:smt020
OldFoo

Post by OldFoo »

joshua3dg wrote:
AndyGeezer wrote:D is not later than G



21576 = Japan BIOS

21577 = USA BIOS



The letter is the Revision



So USA - D = Not compatiable with GD-ROM

You need USA - E or higher, which equates to 21577E
I see. I was looking more at the numbers than the letter designation (21577>21576).

Thanks for the clarification. :smt023


and...


brumma wrote:I just re-read the section in the user manual though and it emphasizes the letter, not the number. I would think that if the number were more important as a reference then they would list that as well, but I don't know. Maybe the real indicator is just the letter of the BIOS?




:smt045 Ha ha! I was riiight!! Nyaah nyaah! ;)
OldFoo

Post by OldFoo »

brumma wrote:I just re-read the section in the user manual though and it emphasizes the letter, not the number. I would think that if the number were more important as a reference then they would list that as well, but I don't know. Maybe the real indicator is just the letter of the BIOS?
That's odd. I don't remember reading this part. :smt017 I must have been distracted or something. :smt120
OldFoo

Post by OldFoo »

so there is absolutely no way possbile for the bios on this board to be compatible with the gd-rom accessories (i just want to clarify this because the seller is stating that the games did work prior to shipping).
OldFoo

Post by OldFoo »

It is impossible for a D bios chip to work with GD-ROM as the device driver isn't even present.
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