[phkamp]

The R1000 is a micro-coded computer built from approx 5k TTL functions, with an instruction set consisting of Ada Primitives like "Define a type for a variant structure with 3 variants, you'll get the details later".

It processes 64bit data and 64 bit type information about that data in parallel, in hardware.

It is also object oriented in hardware, there is no linear address space or VM-tree,

Three left in the world, plus one mostly empty chassis.

My Covid19 project was writing a software emulation of it, starting from 400 pages of schematics, because the instruction set is not documented.

And yes, I'm way behind on documenting it, because I also have a life :-)

[quietbritishjim]

> instruction set consisting of Ada Primitives like "Define a type for a variant structure with 3 variants, you'll get the details later".

Wow, it's hard for me to imagine a CPU with such high level instructions. Were these per-process, like virtual memory on a modern processor? Or was there only expected to be one executable running on the machine at a time?

> My Covid19 project was writing a software emulation of it,

Where did you get to? Do you have a link?

[TheOtherHobbes]

The microcoding means you have fairly standard CPU hardware - an ALU, some registers, memory ports, and so on - and the microcode sequences it to emulate the ISA.

So it's not that the ADA primitives were baked directly into TTL.

It's somewhat related to the Itanium model where the compiler generates a Very Long Instruction Word.

Microcode is a standard way of implementing CISC, but this machine took it further than usual.

[shawn_w]

So basically an AdaMachine?