YAMA: yet another microassembler description && users guide

YAM A is an CommonLisp program for creating microcode PROMS. It lets you specify the microcode in a fairly high level language that provides various features found normally in sophisticated assemblers. The salient features of YAMA are 1. Provision for record and enumerated data types at micro assembly level. 2. Provision for a flexible and heirarchical microword format. 3. Provision for horizontal and vertical microprograms with the help of special syntactic constructs. 4. Provision of various directives to tailor the code according to one's taste. It produces the "bit" pattern for the microwords. The input specifications are in a data definition language called MICRO which has a data declaration part, a directives part and a specification section. This report contains the summary of the design of the micro assembly language and the construction of the micro assembler and also serves as the user's guide.