AMD Bit-slice machines

Hi When I worked for Intel ( years ago ) I knew the fellow that wrote the micro code for the double density controller. The sequencer for the 3000 series was not the easiest to work with. Unlike the 2900 stuff, it didn't just sequence to the next address ( like most uP ). Each instruction had an indiction as to what the next address was. The micro code is organized as rows and columns. One could jump conditionally or not to another location in a row or column. There were special jumps to the first row or column. Filling the micro code ROMs was something like learning to play a good game of chess. If one wasn't careful, one would work themselves into a corner that you couldn't get to the empty space you wanted to use ( other than an additional clock cycle ). Dwight