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Difino
| • | The HP 3000 series is a family of minicomputers released by Hewlett-Packard in 1973 after a difficult development project. It was intended to be the first minicomputer delivered with a full featured operating system with timesharing.
The early "Classic" machines were based on a 16-bit custom CISC processor. Around 1988 machines using HP's PA-RISC processors shipped in volume, bringing 32 bit addressing. Binary compatibility with the older machines was (and is) maintained.
The 3000 series operating system is called MPE and includes a built-in database called TurboIMAGE.
In 2003, HP discontinued 3000 series sales. All support will be terminated beginning Jan 1, 2007.
The 16-bit microcoded machines (Series I, II, III, 30, 33, 39, 40, 42, 44, 48, 52, 58, 64, 68, 70, 37, ...) implement a 16-bit word addressed, byte-addressable, segmented, Harvard, Stack Instruction Set Architecture (ISA). Most of the ~214 instructions are 16-bit wide. Stack-operations pack 2 per 16-bit word andthe remaining few are 32-bits wide. Code and data reside in variable-length segments, code, read-only, rentrant and limited to 32760 bytes and data to 65528 bytes. MPE loads code segments from program files and segmented Library (SL) filesat need, up to 256 segments in one process.
CISC Implementations
· Series 30, 33: Silicon on Sapphire
Source: [wikipedia: hp 3000]
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