I just received a few clones of the 82S100 from Russia on ebay. They are marked KR556RT2 and appear to be in a fresh DIP package. I ordered them at the end of April and they arrived in early July. $29 plus $10 shipping for nine units. I used WINCupl with target device "f100" to develop a JEDEC file and used WINSim to add some test vectors. I attempted to program the chip using a DataI/O Model 29B with a LogicPak and the proper programming adapter 303A-001 for the Signetics 82S100. I used this setup before with real 82S100 or Philips PLS100 chips with no issues. The JEDEC loaded into the DataI/O with the proper sum check, but when I tried to fuse the part, I received an immediate Error 21 which is 'Illegal Bit'. The description of the error states that it is not possible to program the device due to already programmed locations of incorrect polarity. A second chip had the same result. I assume these chips have been previously programmed or are fakes. -- Sent from: http://cbm-hackers.2304266.n4.nabble.com/Received on 2020-07-14 06:00:03
Archive generated by hypermail 2.3.0.