6. The digital computer system of claim 2, wherein each of said procedures further includes a dialect code denoting a dialect of which the S-Language instructions of each procedure are members, and wherein said microcode control means further comprises: control store means (SITT 11012) for storing said sequences of microinstructions for controlling said ALU means, and dispatch table means (SIDT 11010) for storing addresses corresponding to locations in said control store means of each said sequence of microinstructions, said dispatch table means responsive to said dialect code and to each said instruction to provide to said control store means each said address corresponding to said at least one microinstruction sequence corresponding to each said instruction, and said control store means responsive to each said address to provide to said ALU means said sequence of microinstructions corresponding to each said instruction.
8. The digital computer system of claim 6, said control store means comprising: writable control store means connected from said bus means for storing said sequences of microinstructions, and said dispatch table means further comprising write address means responsive to operation of said processor means for generating write addresses, said writable control store means responsive to said write addresses for storing said sequences of microinstructions.