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When developing support software for the Gypsy-2000, questions often arise which others have asked. These questions and their answers may give the reader more understanding of how to take advantage of the many features available in order to gain optimum performance from a Gypsy-2000.
These questions have given rise to the following Application Notes. The titles of all Application Notes have been collected together in the list below. An abstract for each Application note follows this list.
| Last Update | Number | Title |
|---|---|---|
| May 20 1997 | APN01: | DISCONNECT PRIVILEGE AND BUFFERED MODE OF OPERATION |
| May 22 1997 | APN02: | AUTOMATIC REMOTE LINE TERMINATE (RLTER) |
| May 23 1997 | APN03: | MODE SENSE AND MODE SELECT |
| May 27 1997 | APN04: | PLOT/FORMAT TIMEOUTS |
| May 28 1997 | APN05: | DRIVER/LIBRARY "COMMON" CALLS |
| Mar 19 1996 | APN06: | PLOTTER HANDSHAKING "RDYCOND" |
| Mar 19 1996 | APN07: | IKON(tm) COMPATIBILITY CALLS |
| Mar 20 1996 | APN08: | SETTING SCSI DEVICE ADDRESS |
What does it mean that a SCSI target that has been granted the "disconnect privilege" or been placed into "buffered mode of operation?" When are these useful and how are they invoked?
How is Automatic Remote Line Terminate useful? When is it not useful? How does it affect data throughput?
The SCSI Mode Sense and Mode Select commands provide for control of various operating parameters. This application note contains suggestions for use.
The Gypsy has two timeouts relating to plotter response. When should the default timeouts be changed? How are these timeouts related to host system timeouts?
Open(), Write, Close(), and especially IOCTL(). When writing a driver or library, what parameters or operations should be considered? Consider compatibility with similar software? Strive for simplicity or for completeness? The simple approach may allow the user to rapidly get a system plotting, but prevent the user from taking advantage of various features or options of the Gypsy. This application note should also give an application developer details about writing to a "common" set of driver calls.
Embedded within the Mode Sense/Select parameters is RDYCOND. How does it affect performance? When should some value other than the default be chosen?
The Ikon(tm) host adapter hardware registers are sometimes used as the basis of driver or application software development. How are these commonly used? Compatibility is quite important for those users whose experience or applications include Ikon style operations.
This application note describes three methods of setting the SCSI ID (or device address) of the Gypsy-2000. The three suggestions are for the users who purchase the Gypsy-2000 printed circuit assembly without the enclosure.
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