retro-software.B5500-software/B6500-Simulator

Burroughs B6500 Simulator and Early MCP for the B5500

These files were transcribed by James Fehlinger of New Jersey, US in
mid-2014, from scans of listings provided by Al Kossow of bitsavers.org.

B65SIM.alg_m
    A simulator for the Burroughs B6500 written in a variant of B5500
    Extended Algol, termed LONGALG. This variant implement a "Long
    Array" type, which appeared to the programmer to be a single-
    dimensional array, but was implemented as a two-dimensional array.
    The compiler generated code to partition the array index into column
    and row portions, and index the row and column accordingly.

B65ESPOL.alg_m
    An early implementation of an ESPOL cross-compiler for the B6500,
    written to run on the B5500. We believe that Don Lyle was the
    principle implementor of this compiler.

B65MCP-MARK00.esp_m
    A very preliminary version of the B6500 MCP. It is notable for its
    use of ESPOL Queue structures, which eventually proved to be too
    expensive at run time, and were removed in the Mark II.0 release.