MA2909 sequencer equivalent, radiation hard microprogram sequencer.
include: I 4-bit cascadable microprogram counter. I 4 x 4 file with stack counter supporting nesting microsubroutines. I Zero input for returning to the zero microcode wo.
The device is a cascadable 4-bit slice such that two devices allow addressing of up to 256 words of microprogram and th.
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