Difference between revisions of "SYSTEM IO"

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==BIOSF_SYSTEM_IO ($C0044A)==
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==SYSTEM_IO ($C0044A)==
  
 
Should be called at the end of the [[68k interrupts|VBlank]] interrupt routine.
 
Should be called at the end of the [[68k interrupts|VBlank]] interrupt routine.

Revision as of 05:58, 21 October 2012

SYSTEM_IO ($C0044A)

Should be called at the end of the VBlank interrupt routine.

Reads coin and game select inputs, jumps to COIN_SOUND, PLAYER_START or DEMO_END accordingly.

Reads the player inputs and sets values in RAM accordingly, see BIOS_RAM_locations#Joypad_Related.