AMD AM27C49 adapter
This chip is a direct replacement for the "almost mythical" TMS2564 (the 24-pin version) that is used in the TI DSDD Disk controller and is upwards compatible with the TMS2532 chip.
You will need to build your own adapter but it is a fairly simple build. In this case, the bottom socket is a 28-pin socket with one or more 24-pin sockets stacked on top of it. The sockets are bottom justified (i.e., pins 1, 2, 27, and 28 are uncovered).. The wiring goes like this:
Bottom socket pin #1 to Top socket pin #20 (Vpp)
Bottom socket pin #2 to Top socket pin #18 (A12)
Bottom socket pin #28 to Top socket pin #24 (Vcc)
Bottom socket pin 21 to Top socket pin #21 (A10)
Bottom socket pin # 23 to Top socket pin #19 (A11)
Pins 27 (PGM), 26 (N/C), 22 (OE), and 20 (CE) from the bottom socket are not connected.
You will have to change the Vpp to 13.5V, Vcc to 5.00V, Vdd to 5.50V and Pulse Delay to 1000us
Select AMD AM27C64 to use as your template to program the chip.
The important thing to remember when making any adapter is that the bottom socket (i.e., the one plugged directly into the TL866) MUST be the one you use for your programming template. The top socket is the one that the EPROM you wish to program is plugged into.
Edited by atrax27407, Wed Mar 14, 2018 10:38 AM.