PCOPY - DualBrain/bsharp Wiki
To copy one screen page to another in all screen modes.
PCOPY sourcepage, destinationpage
The sourcepage is an integer expression in the range 0 to n, where n is determined by the current video-memory size and the size per page for the current screen mode.
The destinationpage has the same requirements as the sourcepage.
This copies the contents of page 1 to page 2: