When you say that the 125 added memory management, what does that mean a little more specifically? My guess is either PDP-11/z280 style paging without page tables (the 16 bit address space makes just having enough IO registers to cover the address space tractable) or some simple segmentation hardware, but it'd be neat if there was another hardware object capability system I didn't know about.
The Mitra 125 had memory segmentation. It seems similar to the 8086, with descriptors that specified base address and length for a segment. Accessing memory outside a segment caused a trap.
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When you say that the 125 added memory management, what does that mean a little more specifically? My guess is either PDP-11/z280 style paging without page tables (the 16 bit address space makes just having enough IO registers to cover the address space tractable) or some simple segmentation hardware, but it'd be neat if there was another hardware object capability system I didn't know about.
The Mitra 125 had memory segmentation. It seems similar to the 8086, with descriptors that specified base address and length for a segment. Accessing memory outside a segment caused a trap.
That sounds more like the 80286/80386.
You're right; I should have said x86-style.