SHIFTED SCREEN LOAD

by Lopez Figueira

from Your Sinclair #26 (February 1988)

[files SHIFTSC1.*]



[NOTE: For this routine to work correctly with an emulator, the screen]

[must be saved as TZX format. Although the save routine will save to a]

[TAP file, the load routine will not recognise it as it uses its own  ]

[loading code and does not call the standard ROM routine.         JimG]



Lopez has sent both Basic and assembly code listings to help you under-

stand what's going on. The Basic listing is really designed for demon-

stration purposes, but can also be used to save a working sub-routine to

tape or microdrive by changing line 50 and adding lines 51 to 54:



50 SAVE "SHIFTSCR" CODE 65000,244

51 PRINT "REWIND TAPE TO VERIFY, THEN PRESS ANY KEY"

52 PAUSE 1: PAUSE 0

53 VERIFY "SHIFTSCR" CODE

54 STOP



The assembly listing has two entry points, LOADER to load the code and

BUILD to save a screen (BUILD a specially saved unit).