Actually I was talking about using the 3rd party
controller to boot the
system after you remove the ROMs from the /53. I'm not talking about
putting the ROMs from the 3rd party disk controller into the sockets on
the /53, which obviously wouldn't work so well.
A perfect example would be the DSD-880 unit. The interface for it can
be configured not to provide the boot code if the system has integral
code for booting RL02 or RX02, but the interface can also be configured
to provide boot code appropriate for either at the standard address.
The only question is whether the KDJ11-D can get out of the way of
such memory references. It obviously has to be configured such that
the on-board ROM doesn't respond to any of the normal addresses for
boot code (beginning at 17765000 and 17773000, if I remember correctly).
I would have to check the manual to find out how to configure it to
do so, if it is possible.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work):
gentry!zk3.dec.com |
| Unix Support Engineering Group | (home):
mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL:
http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+