IBM 610 workstation computer 3456

Keith

The point that you are missing is that *I have seen them fail.* BAH may have too.

Modern instruction sets containing index registers and return instructions from have practically eliminated self modifying software. The CPU does not need write access to the code areas of Linux, Windows and WORD whilst running them.

Note the buffer overflow bugs abused by virus writers would not work if code areas were read-execute only.

Placing the programs in rom would also cause them to run a lot faster, disk reads are very slow.

Hard luck on failing computer architecture 202. The student may wish to look up capability architectures. The separation of code and read-write data areas is elementary.

Very relevant if the record is in global ram. Computers process records which can cause a lot of extra work for programmers if the instruction sets only support words. A big array in global memory may be a single record or several records.

Yes. Files live on disk. Also when a program finishes its virtual storage areas have to be removed from the disk.

And I want them used.

Both but primary through the disk handler. Large data areas including queues normally live on disk. Only smallish inter processor data areas that can safely be lost on power failure live solely in ram.

For write-back L2 cache to work all the CPUs must be connected to the separate computers communicating over the internet. All common data had to be explicitly transmitted by the software.

Andrew Swallow