Accelerator to boost original clock speed of 8088/NEC V20 past 4.7mhz to 7.5mhz

*NOTE* With the 7.5mhz option enabled the machine will be unable to write to floppy disks until set off to default speed, This is due to the floppy controllers reliance on CPU speed for write cycles.

Resistors (All 1/4 w)

R1, R2 - 560 ohm Mouser #:660-MF1/4LCT52R561J

R3 - 3.3k Mouser #:660-MF1/4LCT52R332J

R4,R5 - 10K Mouser #:660-MF1/4LCT52R103J

CAPACITORS

C1,C3,C4 - 10 UF 16V TANTALUM Mouser #:581-TAP106K016CRS

C2 - .01UF CERAMIC DISK Mouser #:594-D103M43Z5UL63L6R

DIODES

D1,D2 - 1N91/1N4148 SWITCHING Mouser #:78-1N4148

IC'S

U2,U3 - INTEL 8284A CLOCK GENERATOR

U4 - INTEL 8088-2 CPU/NEC V20

CRYSTAL

X1 - 22.11 MHZ Mouser #:449-LFXTAL027467BULK

MISC

U1 - 18 PIN WIRE WRAP SOCKET OR HEADER PINS

TB1 - 4 CONDUCTOR TERMINAL STRIP RS# 276-1389

SW1 - SPDT TOGGLE SWITCH RS# 275-326

SW2 - OPEN PUSH BUTTON SWITCH RS# 275-1549

SWITCH MOUNTING CASE RS# 270-230

SOLID 4 COND. FLAT CABLE - LENGTH TO SUIT RS# 278-757

SOLDERTAIL SOCKETS FOR U2 & U3 (18 PIN) RS# 276-1992

Credit for designs to Douglas Severson 1985