RLV11 in VAX 4000-400?

From: Zane H. Healy <healyzh_at_aracnet.com>
Date: Fri Jul 11 01:38:00 2003

>Can I use a RLV11 in a VAX 4000-400?
>
>The pdp11-field-guide.txt says:
>RLV11 RLV11 Q RL01/02 disk controller option, consists of
>RLV11 modules M8013 and M8014. Q/CD-only option.
>RLV11 18-bit DMA only. Caution: uses BC1 and BD1
>RLV11 for purposes other than BDAL18 and BDAL19
>
>The VAX 4000-400 has a 22 bit Qbus (all slots are Q/CD). So it looks
>like this can't work due to the 22 bit bus that uses BC1 and BD1?

You need an RLV12.

                Zane

-- 
--
| Zane H. Healy                    | UNIX Systems Administrator |
| healyzh_at_aracnet.com (primary)    | OpenVMS Enthusiast         |
|                                  | Classic Computer Collector |
+----------------------------------+----------------------------+
|     Empire of the Petal Throne and Traveller Role Playing,    |
|          PDP-10 Emulation and Zane's Computer Museum.         |
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Received on Fri Jul 11 2003 - 01:38:00 BST