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3

Here's another off the road candidate: DoubleDuty for the TRS-80 Model 4 It split the 128 KiB main RAM of a full fitted Model 4 into two 64 KiB partitions, each able to run a stand alone application, plus a 16 KiB partition with just DOS. (Catalogue scan taken from the Radio Shack Catalog Archive)


4

I used an operating system with a MODCOMP minicomputer c. 1978 that had fixed partitioning. I believe it was the MAX III operating system and a MODCOMP II computer. During system build, you created partitions for foreground and real-time processes. The foreground partitions you could use for program development; the background partitions were for the real-...


3

The RSX-11 {D/M/M-PLUS/S} family of operating systems, running on PDP-11 minicomputers, divided real memory into partitions. Partitions were mostly set up at system generation time; you could define partitions in a running system, but that was less common. The RSX-11 family were a reimplementation, on the 16-bit PDP-11, of RSX-15 on the 18-bit PDP-15, so ...


4

The definition to which you linked is very specific, and you put a further constraint on it that the partitions must all be the same size (the definition to which you linked makes it clear they need not be; the example they give uses four "blocks," which I assume they feel is another word for "partition," of three different sizes). The CDC 6600 is ...


10

The PDP-8 is a 12-bit computer.  As such it has a word and pointer size of 12-bits — meaning it can access 4k words using a single word pointer. Later models added bank switching (KM8E) and 3 extra address lines so that up to 32k words (8x4k) words could be populated, now having 15 address lines.  (Core memory boards, 4k words each, you ...


4

During the heyday of the Intel 80386, there were many operating systems that relied on that CPU's virtual 8086 mode to multitask programs that were written for x86 real-mode. By allowing real-mode programs to transparently use the segmented, 20-bit address space that they expected, these Operating Systems provided a fixed-size memory partition to each real-...


4

The Acorn MOS, as deployed in the BBC Micro, offers built-in support for paged ROMs. Paged ROMs have a fixed 16kb window in the address space, and amongst other things may contain filing systems, languages or other programs. A BBC or Electron fitted with more than one paged ROM will therefore have a fixed 16kb ROM window in which the current application ...


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