CREDIT DOWN: Difference between revisions
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== CREDIT_DOWN ($C00456) == | == CREDIT_DOWN ($C00456) == | ||
[[ | [[System ROM]] routine called to deduct credits. | ||
Input: Credits to deduct in {{BR|BIOS_CREDIT_DEC1}} for player 1, and {{BR|BIOS_CREDIT_DEC2}} for player 2. | Input: Credits to deduct in {{BR|BIOS_CREDIT_DEC1}} for player 1, and {{BR|BIOS_CREDIT_DEC2}} for player 2. | ||
Revision as of 06:20, 28 October 2015
CREDIT_DOWN ($C00456)
System ROM routine called to deduct credits.
Input: Credits to deduct in BIOS_CREDIT_DEC1 ( $10FDB0) for player 1, and BIOS_CREDIT_DEC2 ( $10FDB1) for player 2.
Input: Credits necessary in BIOS_CREDIT_DEC1 ( $10FDB0) for player 1, and BIOS_CREDIT_DEC2 ( $10FDB1) for player 2.
Credits can be read through $D00034 and $D00035.
Also updates the MVS book keeping.