> On May 17, 2017, at 8:00 PM, Matt Burke <[email protected]> wrote:
>
> 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).
Or the PDP11, where indeed MOVB sign extends.
Is MT_ASTLVL defined as a register where only the low byte has meaning?
paul
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