The optional x8/x9 SOJ/ZIP ADAPTER enables SIMCHECK to test various x8/x9 SOJ and ZIP individual DRAM chips. These include the 400 mil wide SOJ DRAM chips with capacities of 512Kx8/x9 and 2Mx8/x9, as well as the 512Kx8/x9 ZIP DRAM chips.
Connect the adapter to your SIMCHECK SIP ZIF (green) socket when SIMCHECK is either ON or OFF.
HANDLING THE SOJ CHIPS: Pin 1 of the SOJ chip is typically marked with a dot. Alternatively, the short edge of the package which is near pin 1 may be slightly slanted or marked with a tab. There are three SOJ sockets on the adapter. The left socket is for testing the 32-pin 2Mx8/x9 chips. The middle socket is for testing the 28-pin 2Mx8 chip. The right socket is for testing the 28-pin 512Kx8/x9 chips. All the sockets are marked accordingly. Place the chip in the corresponding socket so that pin 1 points away from you. Also, make sure that the markings on the top of the chip face up (this is called "LIVE BUG" insertion). Insert the chip carefully as far as it will go. Use an IC chip extractor or a thin flat head screwdriver to remove the chip from the socket.
If you test a 28-pin SOJ chip and you are not sure whether to use the 2Mx8 or the 512Kx8/x9 socket, you can safely try either socket. In case you have selected the wrong socket, SIMCHECK will protect your chip by immediately stopping the test with a "NO MEMORY" error.
HANDLING THE ZIP CHIPS: Pin 1 of the ZIP chip is typically marked with a dot. The adapter has one 28-pin ZIP socket for testing the 512Kx8/x9 ZIP DRAM chip. Place the chip in the ZIP socket so that pin 1 points to your left.
Once the SOJ or ZIP chip is inserted, press F1 to start the test. SIMCHECK automatically recognizes the adapter. The test procedure is exactly the same as our SIMCHECK PLUS module test.
Required EPROM Version: 2.34 or above.
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