Semiannual technical summary rept. 1 Jun-30 Nov 1971
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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With the exception of the tablet multiplexer and interprocessor interrupt boards, all Laboratory-built hardware for the Terminal Support Processor TSP system has been successfully integrated. While the manufacturer has yet to install the last of a series of modifications to the Meta 4 system, hardware performance and reliability appear adequate to support active software development and system checkout. Simple test programs have been sent from TX-2 to the TSP via the ARPA network and operated satisfactorily. A design change in the LIL language has replaced the implicit data segment with a return stack as a means of providing local storage for subroutines. The necessary changes have been incorporated in the firmware. A strategy for TSP main and disk memory management has been worked out which utilizes a feature of the disk controller design to effect garbage collection while swapping user programs. Network software for the IBM 36067 was certified as conforming to network standards on 20 July 1971. Designs have been worked out for the TX-2 Speech Data Base and a sub-operating system called the Speech Processing Controller. The BCPL compiler for TX-2 has been extended to handle previously discussed structure definitions, and a symbolic debugging system for BCPL programs is being developed. A scan converter display system on TX-2 shows promise for the presentation of speech spectrograms and other gray level displays.
- Computer Programming and Software
- Computer Hardware
- Computer Systems