Difference between revisions of "83Plus:Ports:2F"
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[[Category:83Plus:Ports:By Address|2F - LCD Wait Delay]] | [[Category:83Plus:Ports:By Address|2F - LCD Wait Delay]] | ||
[[Category:83Plus:Ports:By Name|LCD Wait Delay]] | [[Category:83Plus:Ports:By Name|LCD Wait Delay]] | ||
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== Synopsis == | == Synopsis == | ||
Revision as of 11:31, 8 August 2005
| This port only exists as a distinct port on the TI-83 Plus Silver Edition, the TI-84 Plus, and the TI-84 Plus Silver Edition. On the standard TI-83 Plus, it acts as a shadow of port 07. |
Synopsis
Port Number: 2Fh
Function: LCD Wait Delay
After every write to the LCD bit 1 of port 2 resets for a certain amount of time. This port controls that amount time.
Read Values
- This port reads the last vaule written to it.
Write Values
- Bits 0 and 1 control the amount time, the following values tell by how much.
- 0 = ~3.5 microseconds
- 1 = ~8 microseconds
- 2 = ~10.5 microseconds
- 3 = ~15 microseconds
- Bits 2-7: The function of these bits are unknown.
Comments
NOTE: The timings above are ROUGHLY estimated.
This value really shouldn't be changed. TI-OS depends on this being set high enough to function for the LCD delay.
Also the 83+SE has this port set to 4A as defualt, the 84+(SE) has this port set to 4B as defualt.
Credits and Contributions
- James Montelongo
