83:Ports:04
From WikiTI
Revision as of 06:43, 1 April 2005 by 195.56.243.181 (Talk)
Synopsis
Port Number: 04h
Function: Timer Interrupt Frequency
This port controls the frequency of the hardware timer.
Read Values
This is a mirror of the link port.
Write Values
- Bit 0: Unknown. The calculator crashes when set. Maybe it has more or less the same behaviour as bit 0 of 83Plus:Ports:04.
- Bits 1 and 2 control the hardware timer frequency. Setting both 0 sets the timer to the fastest speed, and both 1 is the slowest speed. The normal speed is with both bits 1.
- Bit 3: Unused? Always 0.
- Bit 4: Unused? Always 1.
- Bit 5-7: Unknown, but definitely used.
