A4000-T Jumper

Jumper	Settings	Jumper Description
J100,	(CLK90 clock source)determined by assy	pins 1-2=Internal, 2-3=External
J104,	(CPUCLK clock source) determined by assy	pins 1-2=Internal, 2-3=External
J151,	(ROM Speed) pins 1-2	pins 1-2=160ns, open=200ns
J212,	(NTSC/PAL) pins 1-2=-01, pins 2-3=-02	pins 1-2=NTSC, pins 2-3=PAL
J300,	(RAM Size) determined by assy	pins 1-2=1Mx32, pins 2-3=256Kx32
J500,	(SYNC ON GREEN) pins 1-2	pins 1-2=no, pins 2-3=yes
J700,	-	leave open

PAL/NTSC-Umbau

benötigt nur einen entsprechenden Quarz-Oszillator
- für PAL : mit 28.375160 MHz
- für NTSC : mit 28.63636 MHz
den Jumper 212 ensprechend obiger Tabelle setzen
That's all