SYNC
BOTTM DEFB 105,12H,63,0,0,0,0,0,0,0,0,0,0,0,0,0
;151 lines, size of the bottom border
DEFB 252,16,6,63,0,0,0,0,0,0,0,0,0,0,0,0
;4 lines, sync on
DEFB 255,90H,63,32,0,0,0,0,0,0,0,0,0,0,0,0
;1 line, sync switch of at half line
;Nick generate IRQ here
DEFB 252,12H,6,63,0,0,0,0,0,0,0,0,0,0,0,0
;4 empty lines (VBLANK)
TOPM DEFB 104,13H,63,0,0,0,0,0,0,0,0,0,0,0,0,0
;152 lines, size of top border
SYNCH EQU $-SYNC ;size of sync block