https://deramp.com/swtpc.com/MP_A/MP_A_AssemblyInstructions.pdf Parts List MP-A Microprocessor/System Board Resistors R1, R2, R4 1M ohm 1/4 watt resistor R3, R7, R12, R13 10K ohm 1/4 watt resistor R5, R6 6.8K ohm 1/4 watt resistor R8, R9, R19 1K ohm 1/4 watt resistor R10, R11 4.7K ohm 1/4 watt resistor R14, R17 10 ohm 1/4 watt resistor R15, R16 22 ohm 1/4 watt resistor R18 470 ohm 1/4 watt resistor Capacitors C1, C2, C4, C14, C15 0.1 mfd disc. capacitor C3 100 mfd @15 VDC electrolytic capacitor C5 0.01 mfd mylar capacitor C6 0.1 mfd mylar capacitor C7 0.47 mfd tantalum capacitor C8 1000 pF polystyrene capacitor C9, C10 33 pfd polystyrene capacitor C11, C12 120 pfd polystyrene capacitor C13 1000 pfd polystyrene capacitor Semiconductors IC-1 MC6800 MPU (MOS) IC-2 MC6830L7 ROM (MOS) IC-3 MC6810L-1 RAM (MOS) IC-4 MC14411 Baud Rate Generator (MOS) IC-5, IC-6, IC-7 DM8097 Hex Tri-State Buffer IC-8, IC9 DM8835 Quad Bi-directional Transceiver IC-10 7404 Hex Inverter IC-11 555 or 1455 Timer IC-12, IC-13 7400 Quad NAND gate IC-14 74L04 HP Hex Inverter IC-15 DM8098 Hex Tri-State Buffer IC-16 7420 Dual 4-Input MAND Gate IC-17 7805 +5 VDC Voltage Regulator IC-18 74H00 HS Quad NAND Gate IC-19 74H08 HS Quad AND Gate IC-20 7474 Dual "D" Flip-Flop Q1, Q2 2N5087 transistor Q3, Q4 2N5210 transistor Misc. XTAL 1 1.7971 MHz Parallel Resonant Crystal