Apple //e Double LORES library
Purpose: DOLORES is an extension containing functions that enable drawing on the Double LORES screen of an Apple //e enhanced or better. This library should be included in any source code project in order to easily access the single functions by direct subroutine calls after setting the required variables.
NOTE: DOLORES must be assembled in the memory range from $6000-$8FFF in order to work correctly since the code is copyied also to AUX mem to be run there for certain functions!
Please note that DOLORES spoils parts of the zero page variables which may leave your Apple in an undefined state. In order to prevent this you should save a copy of the zero page before calling DOLORES functions!
More technical information can be found here: http://golombeck.eu/index.php?id=48&L=1