1. Original uncompressed
2. Disassembled with Easy Rider 4
3. Graphics L0081: saved from MonST to a file, L0081,L0081+7CFF

Versions:
2. CD150_2.S:
Old resolution saved in oldrez variable,
Restored on exit.

3. CD150_3.S:
Palette saving.
Mouse off and on code added.

4. CD150_4.S:
Top Border removed with 17218 clock cycle wait.
MOVEM.L D7/D1,-(A7) moved to start of ISR.

5. CD150_5.S:
Screen cleared on exit.
Palette set to black and white for info.

Redundant code removed:
      CLR.B     $FFFFFA11.W 
      RTE 
#

#$434 = 1076
12+16 on exit
#

vbl:
move.w #434,d0
nop
dbra d0,-4

hbl:
nothing
#

It is the top border that is not stable because
disabling timerb (lower border) has no effect or consequence.
TimerB is resposible for rasters and lower border removal.
#
