SYSTEM IO: Difference between revisions
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== | ==SYSTEM_IO ($C0044A)== | ||
Should be called at the end of the [[68k interrupts|VBlank]] interrupt routine. | Should be called at the end of the [[68k interrupts|VBlank]] interrupt routine. | ||
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Reads the player inputs and sets values in [[68k user RAM|RAM]] accordingly, see [[BIOS_RAM_locations#Joypad_Related]]. | Reads the player inputs and sets values in [[68k user RAM|RAM]] accordingly, see [[BIOS_RAM_locations#Joypad_Related]]. | ||
'''This call does NOT save registers.''' | |||
[[Category:BIOS calls]] | [[Category:BIOS calls]] | ||
Latest revision as of 12:02, 15 April 2018
SYSTEM_IO ($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.
This call does NOT save registers.