Nova
A minicomputer(?) introduced by Data General 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) In addition suitable contents:
[ 2 ] [ = ] [ AC2 ] [ AC3 ] [ accumulator ] [ ACE ] [ ad ] [ address ] [ addressing mode ] [ af ] [ ai ] [ al ] [ AM ] [ am ] [ an ] [ ar ] [ arc ] [ as ] [ at ] [ au ] [ b ] [ ba ] [ base ] [ be ] [ bi ] [ bit ] [ br ] [ by ] [ byte ] [ C ] [ ca ] [ cat ] [ cc ] [ CE ] [ ch ] [ child ] [ ck ] [ cl ] [ co ] [ com ] [ computer ] [ con ] [ core ] [ CP ] [ CPU ] [ cr ] [ cu ] [ cy ] [ cycle ] [ D ] [ Data General ] [ dd ] [ de ] [ dec ] [ design ] [ DP ] [ du ] [ dynamic RAM ] [ E ] [ ec ] [ ed ] [ ee ] [ eg ] [ er ] [ era ] [ es ] [ et ] [ feature ] [ fi ] [ file ] [ fo ] [ for ] [ fr ] [ frame ] [ frame pointer ] [ G ] [ gh ] [ gi ] [ gn ] [ gr ] [ h ] [ hr ] [ id ] [ ie ] [ il ] [ in ] [ inc ] [ index ] [ int ] [ Intel 8008 ] [ io ] [ ir ] [ is ] [ it ] [ K ] [ ke ] [ ki ] [ la ] [ ld ] [ Lex ] [ li ] [ location ] [ ls ] [ ly ] [ M ] [ ma ] [ mall ] [ memory ] [ memory location ] [ minicomputer ] [ mo ] [ mod ] [ mode ] [ model ] [ module ] [ mp ] [ mu ] [ N ] [ na ] [ nanosecond ] [ nc ] [ ne ] [ ng ] [ ni ] [ no ] [ ns ] [ O ] [ om ] [ op ] [ pa ] [ PACE ] [ PD ] [ PDP ] [ pe ] [ ph ] [ pl ] [ point ] [ pointer ] [ pr ] [ process ] [ processor ] [ program ] [ program counter ] [ query ] [ RAM ] [ rc ] [ re ] [ register ] [ register set ] [ ro ] [ routine ] [ ru ] [ S ] [ se ] [ set ] [ si ] [ sig ] [ sm ] [ so ] [ st ] [ stack ] [ stack pointer ] [ store ] [ struct ] [ su ] [ subroutine ] [ T ] [ th ] [ to ] [ tr ] [ tw ] [ ug ] [ um ] [ up ] [ us ] [ V ] [ va ] [ ve ] [ word ] [ yt ]
[ Go Back ]
Free On-line Dictionary of Computing Copyright © by OnlineWoerterBuecher.de - (8533 Reads) |
