Intel Multibus based development systems for 8080 8085 When reading the below, keep in mind that "MDS is an ordering system, not a name". Translation: Intel was told by Mohawk Data Services not to use their initials. MDS-200 series: a hodge-podge ----------------------------------------------- Small blue boxes, with a row of push buttons on the front. The cards are horizontal. MDS-220, 221, 222 - IPB type CPU board, internal 8" floppy, CRT MDS-225 - IPC type CPU board MDS-230 - ??? CPU board, MDS-720 floppy drive MDS-240 -??? CPU board, hard drive, MDS-720 floppy drive optional MDS-286 - IIOC 8086 CPU board The above are in a 6-slot Multibus chassis, with the IPB/IPC interrupt switches on the front. The slots are horizontal. MDS-201, 202 are the 4-slot Multibus expansion chassis, MDS-210 is a low-profile chassis with a four-slot Multibus, which may contain an IPB CPU, or it may be upgraded with an IPC CPU. MDS-720 is a double density floppy controller and cabling kit and a pair of 8-inch floppies The IPB is an 8080A CPU board, with optional PROM daughter card The IPC is an 8085 CPU board. The IOC is an 8086 CPU board. These are Multibus but not of standard dimensions. intellec 800 AKA intellec mds --------------------------------------------- A large blue box, with several flip switches on the front. The cards are vertical. There's an 18-slot Multibus backplane, cards facing left/right. MDS 710 - floppy drives and single density controller MDS 720 - floppy drives and double density controller MDS 730 - drives only not sold with controller May be in a low-profile case ( horizontally mounted.) or "upright" (vertically mounted). DOn't know how that's designated.