Difference between revisions of "83Plus:Ports:11"
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== Comments == | == Comments == | ||
− | In 6-bit | + | In 6-bit transfer mode, only bits 0~5 have any significance. |
THe RAM location affected can be changed through the [[83Plus:Ports:10|command port]]. The location will also automatically change according to the auto-increment or auto-decrement mode as set in the command port. As with sending commands, you must wait a full LCD Cycle (10 microseconds) between reads and writes. | THe RAM location affected can be changed through the [[83Plus:Ports:10|command port]]. The location will also automatically change according to the auto-increment or auto-decrement mode as set in the command port. As with sending commands, you must wait a full LCD Cycle (10 microseconds) between reads and writes. |
Revision as of 20:00, 3 April 2005
Synopsis
Port Number: 11h
Function: LCD Data Port
This port transfers data to and from the LCD driver's internal RAM.
Read Values
- The byte at the current location in RAM. Each bit corresponds to one pixel.
Write Values
- Sets the byte at the current RAM location. Each bit corresponds to one pixel.
Comments
In 6-bit transfer mode, only bits 0~5 have any significance.
THe RAM location affected can be changed through the command port. The location will also automatically change according to the auto-increment or auto-decrement mode as set in the command port. As with sending commands, you must wait a full LCD Cycle (10 microseconds) between reads and writes.
Example
;Cause all the pixels at the current location to be black. ld a, 0FFh out (11h), a push hl push de pop de pop hl nop ;And turn them back off. xor a out (11h), a