Mike_Z
Veteran Member
Well..... winter is here in Wisconsin and at full strength. So I'm out of the garage and back to the bench to work on my 8080 machine. I'm working on connecting an 8" drive to it for the purpose of using CP/M 2.2 on this machine. A long time ago I started this project but my family and real job got in the way, now that I'm retired I have resurrected the project. Recently I've been converting all my OLD OrCAD drawings to KiCAD, excellent program. This has afforded my an even closed inspection of my connections. I think that maybe I have had a wiring error for a long time. Actually I'm unsure of how to connect a couple.
I have a Siemens FDD 100-8 drive that has the following outputs
Pin 46 RAW DATA --- this has all the clock and data pulses
Pin 48 SEP DATA --- this is just the data pulses (I'm using single density only)
Pin 50 SEP CLK --- this is just the clock pulses
On the 8272 (through 7414 buffers) I have
Pin 22 RDDATA --- Currently connected to FDD Pin 46 RAW DATA all clock and data pulses, I think this is correct
Pin 23 DWIN --- Currently connected to FDD 48 Data pulses only, I'm thinking this should be Clock pulses only
I have read the INTEL data sheets and some application documents, but they have left my brain in a fog. How should these couple of wires be terminated. Thanks for the help. Mike
I have a Siemens FDD 100-8 drive that has the following outputs
Pin 46 RAW DATA --- this has all the clock and data pulses
Pin 48 SEP DATA --- this is just the data pulses (I'm using single density only)
Pin 50 SEP CLK --- this is just the clock pulses
On the 8272 (through 7414 buffers) I have
Pin 22 RDDATA --- Currently connected to FDD Pin 46 RAW DATA all clock and data pulses, I think this is correct
Pin 23 DWIN --- Currently connected to FDD 48 Data pulses only, I'm thinking this should be Clock pulses only
I have read the INTEL data sheets and some application documents, but they have left my brain in a fog. How should these couple of wires be terminated. Thanks for the help. Mike