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A project log for STEbus PC FDC

The FDC for the 8088-based STEbus PC

keithKeith 04/05/2026 at 02:370 Comments

Semiconductors

IC1		LS245		STEbus data buffers
IC2,3,5		LS244		STEbus address buffers
IC4		PAL6R4		J138_U4
IC6		uPD765		FDC
IC7		74LS30		
IC8,11		7405		
IC9		FE2100    	LSI glue logic
IC10		74LS04		
IC12		74LS07		
TR1,2		2N2369A		NPN

Resistors

R1			4k7	
R2,3,5,6		150R
R4			200k
R7,8			2k2

Capacitors

C1,2,7,12	22µ 16V tantalum
C3-7,8-12,14,16	100n
C13		47p

Miscellaneous

XL1		8 MHz crystal

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