PDP-11/23-PLUS
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| PDP-11/23 PLUS | |
|   PDP-11/23 PLUS with two RL02s, TK50, and third party SCSI.  | |
| Manufacturer: | Digital Equipment Corporation | 
|---|---|
| Year Introduced: | November 1981 | 
| Word Size: | 16 bit | 
| Physical Address Size: | 22 bit | 
| Virtual Address Size: | 16 bit | 
| Bus Architecture: | QBUS | 
The PDP-11/23 PLUS, introduced in November 1981, introduced an integrated CPU solution on a single quad-width QBUS board, which included F-11 CPU, MMU, a socket for connecting an FPF-11 floating point unit, and two serial line units, which had a maximum speed of 19,200 baud.