HP Keyboard f. HP2392A Digital-to-analog converter HP Keyboard f. HP2392A Analog-to-digital converter HP Keyboard f. HP2392A Analog I/O device KWV11-C Realtime clock HP Keyboard f. HP2392A DMA parallel interface DRV11-J Four 16-line parallel interfaces DRV11-L Parallel interface DRV11-WA 22-bit DMA parallel interface IEQ11-AB/AD Bit-parallel, byte-serial DMA Q-bus interface controllers RA81-HA/HD Integrated 456-Mbyte fixed-disk drive, 120/240 V RQA81 RA81 with KDA50 controller RA60-AF Integrated 205-Mbyte removable-disk drive, 120/240 V RQA60 RA60 with KDA50 controller HP Keyboard f. HP2392A RA81 and RA60 disk controller RD54A Integrated 159-Mbyte fixed-disk drive