T-11 (was Re: PDP-11/70 cache memory)

You are refering to the bk1011 series of machines if i recall correctly, which are instructionset wise equivelant to a baseline pdp11/23+ without CIS or float, but with a 22bit adress bus, there are essentially 2 variants of this machine (with some subvariations in amount of memory), the first is a wedgestyle (think C64 etc.) homecomputer, which has their implementation of the 11/23 chipset, with very very slow DRAM, running at 3.58MHz. and memory mapped bitmap graphics, which also has a inrom emulation of a console device for the RT-11 derived (presumedly from stolen or reverse engineered/disassembled code), the interesting part of this machine is though, is that it has a QBUS connector on the back of the machine, which allows for a wide variation of (homebrewn!) addons for the machine, i think it also has a custom local network protocol (non rs4xx) for connecting several together to a larger soviet produced minicomputer (i do not know what one would be used for that). The second variant is architecturally the same, and used the same microprocessor implementation of the -11, but is in the format of a large graphing calculator, and is functionally equivelant to say, a Ti81, but with very slow graphics plot from what i recall from a ukrainian telling me about it :-), it is not freely programmable though, and you can only run some simple BASIC-esque interpreter on it, together with the calculator software in ROM. the Homecomputer versions are actually not that hard to get, and go for fairly reasonable prices on ebay (i paid 80 euros for mine including shipping from ukraine), but the graphing calculator version of the machine will sell for up to 500 euros, of special interest is, that the graphing calculator was possibly the last produced consumer computer from soviet design (it was released in 1991 from what i recall), altough its not completely soviet from what i read, the LCD screen was actually a western imported part. All the best, a very very sleepy Locutus