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⟦1b3d6f92b⟧ Wang Wps File
Length: 1488 (0x5d0)
Types: Wang Wps File
Notes: Spelunked
Names: »~ORPHAN17.10«
Derivation
└─⟦26e1ab804⟧ Bits:30005814 8" Wang WCS floppy, CR 0001A
└─ ⟦this⟧ »~ORPHAN17.10«
WangText
rrupts with priority higher than or equal to the priority of the process executing
in the CPU are serviced. I/O interrupts can be handled by user defined microprogram
or result in swithching of software process. TIMER interrupts normally occur ever
150 us and are serviced by u-program. When received the TIMER register is decremented
and tested (takes 2 cycles). If negative a local interrupt is generated. CPU interrupts
are serviced by the u-program, handling the message related to the interrpt. Depending
on the message a switch of software process may take place or he current process may
continue.
2.2.1.3 M̲e̲m̲o̲r̲y̲ ̲M̲o̲d̲u̲l̲e̲s̲
2.2.1.3.1 C̲R̲8̲0̲D̲ ̲M̲e̲m̲o̲r̲y̲ ̲M̲a̲n̲a̲g̲e̲m̲e̲n̲t̲
B̲a̲c̲k̲g̲r̲o̲u̲n̲d̲ ̲t̲o̲ ̲A̲d̲d̲r̲e̲s̲s̲ ̲T̲r̲a̲n̲s̲l̲a̲t̲i̲o̲n̲
The concept behind the various memory anagement features available with the CR80D
computer is that of "Logical-to-Physical Address Translation". The amount of memory
required by a user's program is defined to be his "logical address space". This space
may be as large as 64 1K pages. Th areas of physical storage assigned to the user
are defined to be his "physical address space". The address translation function
that converts addresses in the logical space to address in the physical space is
called the "address map segment" for tat user. Each user has his own, unique logical-to-physical
address map. In addition, there are separate map segments for I/O data channel. The
CR80D Advanced Multiprocessing Operating System (DAMOS) determines what thes maps
are to be, and then rel
