1540 vs 1541
VIC-1540 rev A PCB 1540007 (c)1981 made in Japan (mostly Japanese parts?)
VIC-1541 rev C PCB 1540050 (c)1982 made in Taiwan (w/ parts from jp, kr, id)q
VIC-1540 has 325302-01 and 325303-01 ROMS
VIC-1541 has 325302-01 and 901229-03 ROMS
1540 vs white 1541
VIC-1540 is the same unit as above
VIC-1541 (white) is basically the same as the (tan) 1541