Micro VAX

• hardware
  • KA640
  • Micro VAX 3400
  • VAX 4000 Model 700A
• docs
  • BA411
  • BA213
  • CMD CQD 223M
  • VAX hardware reference

  KA640

  

  I purchased a KA640 CPU and two MS650 RAM boards off ebay to run in a spare BA23 enclosure . I do not have the correct BA23 console kit for the KA640, so some of the console parts hang out the back of the enclosure. I netboot NetBSD off the builtin ethernet port. I can use these cards, as spare parts for the MicroVAX 3400.

  H9278-A	A	B	C	D
  slot one	KA640-AA
  slot two	32MB clearpoint RAM
  slot three	MS650-AA
  slot four	M9047		DZQ11-M
  slot five	RLV12
  slot six	RQDX1
  slot seven	empty
  slot eight	empty

  Micro VAX 3400

  I purchased this vax during the winter of 2004. The 3400 spend the last couple of years in a firewood shed. I got the TOY battery rebuilt, by a local dealer , because it leaked inside the enclosure. I stripped the BA213 enclosure to remove a collection of maple tree seeds and clean up the battery leak.

  

  After I reassembled the BA213 enclosure, I tried a test boot with the KA640 module. Nothing happened, except the F code in the status LED. I quickly learned the power supply requires a minimum load . After installing a M9060 board, in the last slot, the KA640 booted okay.

  The left H7868-A power supply is not operational. It appears to work, with the minimum load -- 5/12V. But when you try to power a hard disk drive, the voltage drops to zero. It also appears that the word "Bad" is scratched in the side of the H7868-A -- another good hint. I tried a spare H7868-A and it appears to work okay.

  card cage	module
  slot one	KA640-AA
  slot two	MS650-BA
  slot three	MS650-BA
  slot four	MS650-BA clone
  slot five	DESQA-SA
  slot six	CXY08
  slot seven	CMD CQD 223TM
  slot eight	TQK70
  slot nine	empty
  slot ten	empty
  slot eleven	empty
  slot twelve	M9060

  VAX 4000 Model 700A

  

  I won this VAX at a local auction, during the summer of 2004. The BA411 enclosure is mounted inside a H9602-MK cabinet.

  card cage	module
  slot one	MS690-D
  slot two	MS690-D clone
  slot three	MS690-D clone
  slot four	MS690-D
  slot five	KA692
  slot six	DESQA-SA
  slot seven	DHV11-A
  slot eight	CMD CQD 223M
  slot nine	TQK50-AA
  slot ten	empty
  slot eleven	empty
  slot twelve	empty