INtel 3604 fuse 512 X 8 PROM, which may require building an adaptor. 36x4 pins 24 pin (x=0 for open collector, x=2 for three-state out) 1 A7 Vcc1 24 2 A6 A8 23 3 A5 Vcc2 22 4 A4 /CS3 21 5 A3 /CS2 20 6 A2 CS1 19 7 A1 CS0 18 8 A0 O8 17 9 O1 O7 16 10 02 O6 15 11 O3 O5 14 12 GND O4 13 To read: 36x4A, 36x4A-2 pin 22 open or 5V, pin 24 5V 36x4AL pin 22 5V, pin 24 open To program: 36x4A, 36x4A-2 pin 22 & pin 24 pulsed 12.5V 36x4AL pin 22 & pin 24 pulsed 12.5V standby: 3604AL on standby when not selected. sselection is when /CS1 and /CS2 are low, CS3 and CS4 are high. operating current when selected is about 100-170mA. Outputs loading of 15ma into 300 ohms to +5, 600 ohms to ground. Based on Intel schematics, probably 1K pullups to +5 good for OC outputs. Above info from Intel data sheets from Intel data book. "Close to" 4K X 8 2732 as follows: 1 A7 Vcc 24 2 A6 A8 23 3 A5 A9 22 4 A4 A11 21 5 A3 /G 20 6 A2 A10 19 7 A1 /E 18 8 A0 O8 17 9 O1 O7 16 10 02 O6 15 11 O3 O5 14 12 GND O4 13 /G is output enable, also programming supply. DON'T PROGRAM! If 3604 read as 2732, may get multiple copies of data depending on setup. appears that to read 36X4A, A-2: pin 22 & 24 to 5V A11 (21) low, /G (20) low, A10 (19) and /E (18) high to read 36X4AL, disconnect pin 24 otherwise same.