Difference between revisions of "KA410 MicroVAX 2000/VAXstation 2000 System Module"
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== System ROM Sets == | == System ROM Sets == | ||
| − | There are at least | + | There are at least five known System ROM Sets (four ICs 64kx8 27512 each): |
| − | * 23-001E7, 23- | + | * 23-001E7, 23-002E7, 23-003E7, 23-004E7 |
* 23-033E7, 23-034E7, 23-035E7, 23-036E7 | * 23-033E7, 23-034E7, 23-035E7, 23-036E7 | ||
| + | * 23-050E7, 23-051E7, 23-052E7, 23-053E7: ROM V2.1 | ||
* 23-092E7, 23-093E7, 23-094E7, 23-095E7: ROM V2.2 | * 23-092E7, 23-093E7, 23-094E7, 23-095E7: ROM V2.2 | ||
| − | * (Order numbers yet | + | * (Order numbers yet unknown): ROM V2.3 is used by the [[SIMH]] microvax2000 simulator |
| + | |||
| + | There are probably some changes in ROM functionality, but there is very little known as of yet: | ||
| + | * ROM V2.2 supports the [[MS400 MicroVAX 2000/VAXstation 2000 Memory Module|MS410-CA 12MB Memory Module]] | ||
== Power Requirements == | == Power Requirements == | ||
Latest revision as of 17:59, 14 August 2022
Description
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
System ROM Sets
There are at least five known System ROM Sets (four ICs 64kx8 27512 each):
- 23-001E7, 23-002E7, 23-003E7, 23-004E7
- 23-033E7, 23-034E7, 23-035E7, 23-036E7
- 23-050E7, 23-051E7, 23-052E7, 23-053E7: ROM V2.1
- 23-092E7, 23-093E7, 23-094E7, 23-095E7: ROM V2.2
- (Order numbers yet unknown): ROM V2.3 is used by the SIMH microvax2000 simulator
There are probably some changes in ROM functionality, but there is very little known as of yet:
- ROM V2.2 supports the MS410-CA 12MB Memory Module
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)
