Difference between revisions of "83:Ports:04"
From WikiTI
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=== Read Values === | === Read Values === | ||
| − | + | This is a mirror of the link port. | |
=== Write Values === | === Write Values === | ||
Revision as of 07:43, 1 April 2005
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.
