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<== Date ==> <== Thread ==>

Subject: Re: MBBI, SHFT, and GDCT
From: "Paul Sichta" <[email protected]>
To: "tech-talk" <[email protected]>
Date: Fri, 14 Aug 1998 11:55:31 -0400
Ralph is addressing my situation.  I should clarify that I'm using mbbi for
DTYP (raw) soft.  My mbbi device's INP link references a 24-bit value
sourced by a separate (CAMAC) record.  For example,   I want to specify mbbi
values derived from 2 bits,  starting at bit 9.

-ps



-----Original Message-----
From: Ralph Lange <[email protected]>
To: [email protected] <[email protected]>; [email protected]
<[email protected]>
Date: Friday, August 14, 1998 11:35 AM
Subject: Re: MBBI, SHFT, and GDCT


>> I am using gdct313 to define an MBBI record and there is no place on the
>> "Edit Attributes" form for specifying the number of bits to 'shift' the
raw
>> value (SHFT).  mbbiRecord.dbd does not assign the SHFT field to a
>> promptgroup.  Is there a reason for this omission ?
>>
>> This situation also applies to record types mbbo,  mbbiDirect,  and
>> mbboDirect.
>
>The SHFT value is device dependent. In most cases it depends on the
>structure of the associated device and can be calculated from the address
>information in the INP/OUT field. So device support usually sets SHFT in
>initRecord() after parsing the INP resp. OUT fields.
>
>Making the SHFT field DCT accessible would introduce redundancy and
>most likely increase error probability.
>
>The only problem could be Raw Soft Support, as there is no address
>information in the INP/OUT fields and SHFT will always be 0. Right?
>
>Ralph
>


Replies:
Re: MBBI, SHFT, and GDCT Ralph Lange

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