• System module with 15 MHz J 11 chipset and 512 Kbytes of - onboard memory • MicroPDP-11/73 complete instruction set 20 MB MFM 5,25" • Expandable up to 4 Mbytes of memory • Two serial-line units, implementing EIA RS 232 or EIA RS 423 - - • 20 MB MFM 5,25" Q-bus backplane • I/O distribution panel • Choice of pedestal, tabletop, or rackmount packaging • Optional four-line or eight-line asynchronous multiplexer from 50 to 9600 baud (DZQ11 or DHV11) • Optional Ethernet capability (DEQNA) • Optional 52-Mbyte (26 fixed/26 removable) tabletop disk drive (RC25) • 20 MB MFM 5,25" 1.2 Mbyte "half-height" floppy-diskette drive - • RD31 "half-height" 20-Mbyte Winchester drive • 20 MB MFM 5,25" "half-height" 42-Mbyte Winchester drive • TK50 95-Mbyte cartridge tape • Add-on support of RD54, RD53 and TK50