Hi folks, I guess people have looked at the pdp-8/m-2 Chassis: http://hisdeedsaredust.com/pdp/pdp8m-2/04112008359.jpg There are some interesting goodies as it's completely max'd out! It appears to have 3x8K memory (a stunning 24K!). M8320 = OmniBus Bus terminator loads. G111 = 8K Memory. M849 = Memory Shield. M8357 = RX8E (8" Dual Floppy controller). M8650 = Teletype control. M847YA = Hardware Bootstrap Loader. M8350 = Posibus interface (surprising). M837 = Memory Extension / Timeshare. M8300 = CPU Regs. M8310 = CPU Regs Ctrl. M8330 = CPU Timing. It was last tested (amazingly) as late as July 1990, a mere 18 years ago. Again, I'm wondering who took the pdp-8/m: Was it the Surrey Museum or Peter? Also Peter, you said it was a simple circuit, do you have the circuit diagrams and procedure for converting a normal PC-based 5.25" Floppy drive to work as an RX-50? I did use PUTR recently on a PC to transfer RT-11 to 5.25" disk so I could install it on my pdp-11/73 (before the PSU failed!); so I know they *can* be used in some sense. Also Johnny, are you actually offering a pdp-8/m or /f!!!!? -cheers from julz @P