Difference between revisions of "FP11 floating point"
(a start, somewhat stubby) |
(No difference)
|
Revision as of 05:17, 18 September 2016
FP11 floating point is the term used for the floating point data types and instructions supported by most PDP-11s which had hardware support for floating point. (Some supported a simpler, less capable floating point capability.)
It supported short (32 bit) and long (64 bit) floating point numbers; both forms used an 8 bit exponent (in 'excess 0200' notation, giving an exponent range of +127. to -128.), a sign bit, and the remaining bits were the fractional part.
The initial implementation was the FP11-B Floating-Point Processor for the KB11-A CPU for the PDP-11/45; it was later used in the KB11-B CPU of the PDP-11/70. Later implementations included:
- FP11-C, used in the KB11-D CPU and KB11-C CPU of the later-production PDP-11/45 and PDP-11/70, respectively
- FP11-A, used in the KD11-EA CPU of the PDP-11/34
- FP11-E, used in the KD11-K CPU of the PDP-11/60
- FP11-F, used in the KD11-Z CPU of the PDP-11/44
- KEF11-A, used in the KDF11 CPUs
- FPJ11, used in the KDJ11 CPUs
| v • d • e PDP-11 Computers and Peripherals |
|---|
| UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 PDP-11/05 • PDP-11/10 • PDP-11/04 • PDP-11/34 • PDP-11/60 • PDP-11/44 • PDP-11/24 • PDP-11/84 • PDP-11/94 QBUS PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93 QBUS CPUs: LSI-11 • LSI-11/2 • KDF11-A • KDF11-B • KDJ11-A • KDJ11-B • KDJ11-D • KDJ11-E Buses: UNIBUS • UNIBUS map • SPC • MUD • EUB • QBUS • CD interconnect • PMI Also: PDP-11 architecture • PDP-11 Extended Instruction Set • FP11 floating point • PDP-11 Memory Management |
| UNIBUS CPUs: KA11 • KC11 • KB11-A • KB11-B • KB11-C • KB11-D • KD11-A • KD11-B • KD11-D • KD11-E • KD11-EA • KD11-K • KD11-Z • KDF11-U
Co-processors: FP11-A • FP11-B • FP11-C • FP11-E • FP11-F • KE44-A • FPF11 Chips: LSI-11 • KEV11-A • KEV11-B • KEV11-C • F-11 • KEF11-A • KTF11-A • T-11 • J-11 • FPJ11 CPU options: KE11-E • KE11-F • KJ11-A • KT11-C • KT11-D • KK11-A • KK11-B • KT24 • KTJ11-B Rare CPU options: KS11 Memory Protection and Relocation option • KT11-B Paging Option • KUV11 Writeable Control Store Front panels: KY11-A • KY11-D • KY11-J • KY11-LA • KY11-LB • KY11-P More on buses: UNIBUS and QBUS termination • Bus Arbitration on the Unibus and QBUS • CTI BUS PDT-11s - PDT-11/110 • PDT-11/130 • PDT-11/150 CTI PDP-11s - PRO-325 • PRO-350 • PRO-380 Other: FIS floating point • PDP-11 Commercial Instruction Set • PDP-11 stacks • PDP-11 family differences |
