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VAX Hardware Virtualization allows users of HP VAX computers to move application software and user data to a non-VAX platform without having to make changes to software and data. VAX Hardware Virtualization is a software solution that replaces VAX hardware.
This approach is best understood when the VAX Hardware Virtualization Software is viewed as a special interface between the old VAX software and a new hardware platform. Basically, the CHARON software presents a VAX hardware interface to the original VAX software, so that the existing software cannot detect a difference. This means no changes have to be made to the existing software. User programs and data can be copied to a new modern industry standard server (64-bit or 32-bit Intel or AMD) and continue to run for many more years.
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- MicroVAX II
- MicroVAX 3600
- MicroVAX 3900
- MicroVAX 3100 models 96 and 98
- VAXserver 3600
- VAXserver 3900
- VAXstation 4000 models 90, 106, 108, 700 and 705
- VAX 6310
- VAX 6610, 6620, 6630, 6640, 6650 and 6660
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The principles of VAX Hardware Virtualization
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The following table explains which hardware boards we virtualize:
Subsystem | Covered VAX hardware |
UART, QUART, CXA16, CXB16, CXY08, DHQ11, DHV11, DZV11, | |
RQDX3, KDB50, TQK50, TUK50, KDM70 | |
NCR53C94 | |
| DSSI Subsystem | SHAC, HSD50 |
| CI Subsystem | CIXCD, HSJ50 |
| Network Controllers | DEQNA, DESQA, DELQA, DEUNA, DELUA, DEMNA, DEBNI, PMADAA |
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Host platform
The Virtualization Software presents standard VAX devices to the VAX operating system, allowing the OS to function as though it were still running on a VAX computer. For example, virtual disk container files in a directory or device files in /dev directory of the host Linux platform are presented by the Virtualization Software to the VAX OS as emulated SCSI disks attached to a SCSI adapter.
With the use of current storage technology, disks do not have to be physically attached to the Host platform, they can also reside on a SAN or iSCSI storage structure.
A similar translation process is also valid for other emulated hardware devices.
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