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MODCOMP CLASSIC Central Processor, Reference Manual

The MODCOMP Classic 7860 and 7870 Series Computers are a high performance computer featuring a four megabyte addressing capability, single bit to sixty-four bit operand processing and a high speed fixed and floating point arithmetic unit. The 7860 Classic series will accommodate either byte parity core memory or solid state, error correcting, MOS memory with two memory protection systems. The 7870 Classic series is available with MOS memory only. An expanded set of instructions greatly enhances the FORTRAN programming capabilities and use of the four megabyte memory capacity. All standard MODCOMP peripherals and I/O subsystems are compatible to the Classic. Selection of one or two bus I/O processors provide up to four I/O busses per system. Each I/O bus provides 16 Direct Memory Processor (DMP) channels.

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