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De - Pt| English Dictionary: NOVA | by the DICT Development Group |
| 3 results for NOVA | |
| From WordNet (r) 3.0 (2006) [wn]: | |
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| From U.S. Gazetteer (1990) [gazetteer]: | |
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Nova, OH Zip code(s): 44859 | |
| From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
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Nova in 1969, with four 16-bit {accumulators}, AC0 to AC3, and a 15-bit {program counter}. A later model also had a 15-bit {stack pointer} and {frame pointer}. AC2 and AC3 could be used for {indexed addressing} and AC3 was used to store the return address on a {subroutine} call. Apart from the small {register set}, the NOVA was an ordinary {CPU} design. Memory could be accessed indirectly through addresses stored in other memory locations. If locations 0 to 3 were used for this purpose, they were auto-incremented after being used. If locations 4 to 7 were used, they were auto-decremented. Memory could be addressed in 16-bit words up to a maximum of 32K words (64K bytes). The instruction cycle time was 500 {nanoseconds}(?). The Nova originally used {core memory}, then later {dynamic RAM}. Like the {PDP-8}, the {Data General} Nova was also copied, not just in one, but two implementations - the {Data General MN601} and {Fairchild 9440}. Luckily, the NOVA was a more mature design than the PDP-8. Another CPU, the {PACE}, was based on the NOVA design, but featured 16-bit addresses (instead of the Nova's 15), more {addressing modes}, and a 10-level {stack} (like the {Intel 8008}). [Speed, mini?] (2003-10-23) | |
