Memory expansion hardware for PDP11 computers
Conference
·
OSTI ID:6614260
This presentation describes two hardward solutions to normal-11 data memory limitations. One uses a modified DECKit 11-D to allow an RSX11M program immediate random access to any memory location on a 128kw UNIBUS. The second provides a software-equivalent method of accessing memory outside of the normal UNIBUS address space. It uses modified non-DEC 64kw memory boards resident in empty UNIBUS slots, but appearing as multiple registers in the device register region of the host PDP11. The method used is expandable with more 64kw boards. All software is contained in the users' tasks, and contention is resolved by assigning private registers to each task. Our implementation includes a parallel processor (BeRa MBD-11) on the UNIBUS which also has access rights to this extended memory.
- Research Organization:
- Washington Univ., Seattle (USA). Nuclear Physics Lab.
- DOE Contract Number:
- AC06-81ER40048
- OSTI ID:
- 6614260
- Report Number(s):
- DOE/ER/40048-6-L2; CONF-811214-9; ON: DE83004889
- Country of Publication:
- United States
- Language:
- English
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