Trackball: Difference between revisions

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Sort of an upside-down mechanical mouse, uses two optical encoders handled by the [[SIT board]].
Sort of an upside-down mechanical mouse, uses two optical encoders handled by the [[SIT board]].


Special [[BIOS]]: 236-bios.sp1. X counter in {{Reg|REG_P1CNT}} when bit 0 of {{Reg|REG_POUTPUT}} is 0, otherwise Y counter.
Special [[System ROM]]: 236-bios.sp1. X counter in {{Reg|REG_P1CNT}} when bit 0 of {{Reg|REG_POUTPUT}} is 0, otherwise Y counter.
Refreshed every vblank unconditionnaly by this BIOS.
Refreshed every vblank unconditionnaly by this System ROM.


[[Category:Cartridge systems]]
[[Category:Cartridge systems]]

Revision as of 09:26, 23 November 2015

Controller type used only by The Irritating Maze.

Sort of an upside-down mechanical mouse, uses two optical encoders handled by the SIT board.

Special System ROM: 236-bios.sp1. X counter in REG_P1CNT when bit 0 of REG_POUTPUT is 0, otherwise Y counter. Refreshed every vblank unconditionnaly by this System ROM.