KA410 MicroVAX 2000/VAXstation 2000 System Module
There are two versions of the KA410 MicroVAX 2000/VAXstation 2000 System Module:
- KA410-A: MicroVAX 2000
- KA410-B: VAXstation 2000
The KA410 system module is central to the entire MicroVAX 2000/VAXstation 2000 computer system. It is a printed circuit board mounted on the FCC shield. The system module contains all the control and interface electronics needed to support the CPU chip, support all I/O for the disks and tapes, support the video subsystem, and support the three option ports (memory, Ethernet network, and a graphics option port). This system module contains 2 megabytes of RAM and is used in both the VAXstation 2000 and MicroVAX 2000 systems. A jumper setting on the system module determines which system it is configured for. The system jumper sets a bit in the configuration and test register. [1]
The KA410 MicroVAX 2000/VAXstation 2000 System Module contains:
- Central processor (DC333 MicroVAX CPU chip and DC337 MicroVAX FPU chip)
- ROM memory
- Time-of-Year clock
- DC524 Standard cell
- DC503 Cursor sprite chip
- DC367B Serial line controller
- 9224 Disk controller (up to one diskette drive and two hard disk drives)
- NCR 5380 TK50Z Tape controller (restricted function SCSI)
- ThinWire Ethernet circuits (Transceiver function circuitry)
- Miscellaneous registers
Power Requirements
The system module requires +12 Vdc, +5 Vdc, and -12 Vdc supplies for operation and a special -9 Vdc for power loading at 180 milliamps for the ThinWire Ethernet transceiver circuits on the system module.
References
External links
- VAX 2000 - documentation at Bitsavers
- VAXstation 2000 and MicroVAX 2000 Technical Manual (EK-VTTAA-TM-001)
