EPROMs: Difference between revisions

Revision as of 17:08, July 7, 2023

To do

Random notes I'm taking while dumping EPROMs. Will be a proper article in the future.

Common EPROM types

Type	Size	Size (hex)	Name	ID	Manufacturer
8-bit
27C1000 (non-JEDEC)	128 KB	0x20000	M27C1000	2086	ST Micro
			HN27C101	0738	Hitachi
			HN27C301	-	Hitachi
			D27C1000	-	NEC
			uPD27C1000A	1016	NEC
			27C2001	256 KB	0x40000	M27C2001	2061	ST Micro
27C4001	512 KB	0x80000	M27C4001	2041	ST Micro
			TC574000	988C	Toshiba
			TMS27C040	9750	TI
			D27C4001	10C8	NEC

27C1000/27C1001

There are two types of 128KB/1Mbit EPROMs — 27C1001 and the non-JEDEC compliant 27C1000. Their pinouts have the A16 and output enable pins switched. An adapter/jumper wire is needed on some EPROM dumpers. The switched pins are marked red in the pinout pictures below.