VBA-M (Archived - Now on Github) / Bugs / #24 [GBA] Unsupported BIOS function 1a

#24 [GBA] Unsupported BIOS function 1a

Milestone: Verified

Status: closed-out-of-date

Owner: nobody

Labels: Core (28)

Priority: 7

Updated: 2018-02-10

Created: 2009-08-21

Creator: Anonymous

Private: No

Game:
Name: Phantasy Star Collection
Region: USA
CRC: E5A7FE17 (clean version without mode7 intro)

When the game reaches the Digital Eclipse intro, it outputs the following message, if no GBA BIOS enabled:
"Unsupported BIOS function 1a called from 0800401e. A BIOS file is needed in order to get correct behaviour."
The Digital Eclipse intro will play, but without sound. The game after that seems to be fine without a BIOS.

With GBA BIOS enabled & available, the intro plays nicely WITH sound.

I think in order to fix it, someone has to reverse engineer the appropriate BIOS function and rewrite it for VBA-M, respecting current laws for reverse engineering.

Discussion

Spacy - 2009-08-22

Was posted by me (forgot to log in)

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Spacy - 2009-08-22

priority: 5 --> 1
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Squall Leonhart - 2009-08-23

just write a compatibility note for it in the compatibility section and i'll add the force bios bit in the next release of vba-over.

Its probably related to the memory read/writeback issues though.

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Squall Leonhart - 2010-08-27

priority: 1 --> 7
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Squall Leonhart - 2010-08-27

emulating bios functions aren't low priority

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Squall Leonhart - 2012-05-24

1a (or 1ah) is SoundDriverInit

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Squall Leonhart - 2013-02-10

milestone: 823648 -->

labels: 1087484 --> Core
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Squall Leonhart - 2013-02-10

milestone: --> Verified

status: open --> open-accepted
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Squall Leonhart - 2018-02-10

Status: open-accepted --> closed-out-of-date
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[GBA] Unsupported BIOS function 1a

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#24 [GBA] Unsupported BIOS function 1a

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