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VAX and PDP11 Hardware Virtualization allows users of HP VAX and PDP11 (Previously known as DIGITAL VAX and PDP11) computers to move application software and user data to a modern Intel or AMD based x86 compatible platform without having to make changes to software and data. VAX and PDP11 Hardware Virtualization is a software solution that replaces VAX and PDP11 hardware.
This approach is best understood when the VAX and PDP11 Hardware Virtualization Software is viewed as a special interface between the old VAX and PDP11 software and a new hardware platform. Basically, the CHARON software presents a VAX and PDP11 hardware interface to the original VAX and PDP11 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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- PDP11/93
- PDP11/94
- MicroVAX II
- MicroVAX 3600, 3900
- MicroVAX 3100 models 96 and 98
- VAXserver 3600, 3900
- VAX 4000 models 106, 108, 700, and 705
- VAXstation 4000 model 90
- VAX 6310
- VAX 6610, 6620, 6630, 6640, 6650 and 6660
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The principles of VAX and PDP11 Hardware Virtualization
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The following table explains which hardware boards CHARON virtualizes:
Subsystem | Covered VAX and PDP11 hardware |
UART, QUART, CXA16, CXB16, CXY08, DHQ11, DHV11, DZV11, | |
KDM70 | |
| BI Disks Controllers | KDB50 |
| QBUS Disks Controllers | RQDX3 |
| QBUS/UNIBUS Tapes Controllers | TQK50, TUK50 |
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 and PDP11 devices to the VAX and PDP11 operating system, allowing the OS to function as though it were still running on a VAX and PDP11 computer. For example, virtual disk container files in a directory or physical devices of the host Windows platform are presented by the Virtualization Software to the VAX and PDP11 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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