HT-11 bit bi bit

From: Don Maslin <donm_at_cts.com>
Date: Fri Apr 30 14:40:39 1999

On Thu, 29 Apr 1999, Chuck McManis wrote:

> Ok, so another clue discovered:
> 1) Typing DX1:/Z "zeros" the directory on a
> floppy.
> 2) Trying this on drive 1 leaves the floppy
> scrambled, doing it on drive 0 seems to
> work.
>
> Trying DX0:A=DX1:MONITR.SYS/O does not write the boot block
>
> A disk formatted and zeroed is not mbootable.
>
> Since the source to FORMAT was included I thought I'd take a peek. It tells
> the controller that is embedded in the drive "format that disk." and it does.
>
> There is a slim changce I've got a "spare" 8" drive that I can use to check
> the alignment on my drive 1. Are all 8" drives the same on their connector?
> (actually there are the NEC drives in the Chrislin box that aren't being
> used at the moment.

If the NEC drives in your Chrislin box are similar to those in my NEC APC,
they are wired in a quite dissimilar manner. Mine are a 50-pin header
connector (ala SCSI) and the signals are to and from the ODD pins vice
EVEN on the card edge connector of a Shugart or other.

                                                 - don

> What the heck is used for "delete" on RT-11? backspace doesn't work nor
> does DEL apparently.
>
> If anyone remembers how to actually assemble something I'd appreciate it.
> WHen I run assembl it gives a '*' prompt, to which I can type
> DX0:SAMPLE.MAC and it will assemble it except that it doesn't recognize any
> of the macro definitions because it apparently hasn't included "SYSTEM.MLM"
> or whatever it is.
>
> --Chuck
>
>
>
Received on Fri Apr 30 1999 - 14:40:39 BST