[ForSale-Swap] chip data needed

[J C White]

Anyone on the reflector have any info on
these chips used in a multimode digital
encoder/decoder on ham station?

Thanks

Hans Nitzsche

HA18412, HA13412, (both 23 pin), TI TMS27C256JL  eeprom (how do you erase
these things?),
B882 (TO-220 case), B858, LA5005, CR3CM, L30215, SLA7024M (18b pin), B122

tried several cross references and came up blank...theses appear to be
brittish other than the
Hitachi and TI units.  Any help will be appreciated.  I discovered that when
you let the smoke
out of electronics parts, they no longer function!