System Design of a Dynamic Microprocessor
IEEE Transactions on Computers
Programming-Language-Oriented Instruction Streams
IEEE Transactions on Computers
The LX-1 Microprocessor and Its Application to Real-Time Signal Processing
IEEE Transactions on Computers
Burroughs' B6500/B7500 stack mechanism
AFIPS '68 (Spring) Proceedings of the April 30--May 2, 1968, spring joint computer conference
Effective use of data communications hardware
AFIPS '74 Proceedings of the May 6-10, 1974, national computer conference and exposition
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A central processing unit to handle data communications chores as a front-end computer has historically been either a maxi-computer, overpowered for the intended job, or a mini-computer, stripped of many instructions and architectural features that now ease the programming burdens of commercial data processing. Front-end CPU's are evolving into general-purpose machines in their own right due to demands for more generalized processing by the front-end, such as code conversion, message text pre-editing, and local (i.e., not performed by the host computer) message switching. Front-end CPU's must be dual-purpose machines---a special-purpose input-output structure to handle communications efficiently, and a general-purpose data handling structure to perform tasks such as described above. Certain desirable features of a front-end CPU are described informally in this paper, then the architecture of a proposed front-end CPU which incorporates these features is presented.