I'm designing an RH11 disk controller for my KS10 FPGA. I'd like to use the SIMH data format for the media.
I noticed that an RP06 disk image from SIMH is 315,187,200 bytes. Assuming an RP06 has 815 cylinders, 19 heads, 20 sectors (confirmed in SIMH code) - I calculate that disk image should be 317,132,800 bytes. If use 810 cylinders (instead of 815), I get the size of the of the image file. SIMH doesn't pack data: there are 128 words per sector and each word occupies 64-bits or 8 bytes. Therefore a sector is 1024 bytes. What's am I missing? Rob -- KS10 FPGA Project at: http://www.techtravels.org/KS10FPGA/ _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh