IC1-8 HM50464P-12 64Kx4-bit DRAM IC9 74LS244 IC10 74LS02 IC11 74LS244 IC12 74LS174 IC13 74LS13 IC14 PEGA1A EGA controller IC15 IC16 27128 EGA BIOS IC17 74LS244 IC18 74LS153 IC19 IC20 74LS245 IC21 74LS244 IC22 74LS244 IC23 74LS244 IC24 IC25 IC26 TR1-3 2N2369A R R R R C1-10,13-30 100n C11,12 22µ X1 14.000 MHz X2 16.257 MHz