[Simh] Problem with MT_ASTLVL on the VAX-11/780

[Matt Burke]

On 18/05/2017 00:18, Johnny Billquist wrote:
>
> Hum. Do I remember wrong? I seem to remember that when you MOVB to a
> register, the value should be sign extended. So not just the low byte
> should have been modified.
>
>     Johnny
>

I think you may be thinking of MOVZBL (and MOVZWL for words).

Matt