За попытку отмазки - прокатит, за ссылку на документ - нетСообщение от svinka
Из PDP-11 Architecture Handbook, страница 17
The professional 300 series are full-fledged of the PDP-11 family. The microprocessor chip used in the Professional 325 and 350 is the F-11, the same chip used in the LSI-11/23 and the PDP-11/23 PLUS. ... As a PDP-11 family member, ...
страница 257
However, certain applications place memory, or devices that act like memory, on the UNIBUS. Examples ... :
- Shared (multi-ported) UNIBUS memory
- Certain graphics devices (bit-mapped graphics ...)
- Bus windows (DA11-F)
In these cases, address presented on the UNIBUS may actually be intended for the memory on the UNIBUS. It would be undesirable for the UNIBUS Map to pick up such an address and translate it to a main memory address...
страница E-7
Devices in the I/O page ignore the nine high order address bits BDAL <21:13> and instead decode BBS7 L along with the thirteen low-order address bits
И наконец (я, конечно, мог пропустить - и тогда - страницу в студию, но) - ни слова про 177560-177566
Может и то и другое. Например, по адресам 173000-173776 и 165000-165776 часто можно найти ПЗУ тестирования и загрузчиков
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