My system is a pentium 60 with a socket 4 MB . Manufacturer is unknown . The numbers on the MB are HA1Z402F00419 and MV5-V5P596 V2.0
The memory simms are 72 pin non EDO . I have tried several other simms but they have not worked . The only ones that have worked are the 16 megs that came with the MB . Unfortunately those 2 chips are now failing. The simms have no names on them but the chips are NEC with the numbers 421000-70 and 9511FUD14 . There are 2 stickers on them with the numbers V603741 and 62178400227 . I built the system out of old junk that my friends were throwing away as I could not afford a new one . Any ideas on where I can get these memory simms?