|82h||DP$MSET||set display mode|
|Input||A register - mode required: 0 for 2-line,
1 for 4-line mode.
Bit 7 set specifies leave clock alone.
|Output||A register - previous mode.|
|Description||Sets the Operating System into 2
or 4 line mode.
The following is always carried out:
The B and X registers are preserved.
This call is not available on CM/XP machines.
Machine-code applications for 2 and 4 line machines can use the following
LDAA DPB_MODE BEQ TWO ;branch to run in 2-line mode OS DP$MSET ;set to 4-line mode A=1 ;PUT 4-LINE CODE HERE RTS TWO: ;PUT 2-LINE CODE HERE RTS
|Errors||- none -|