Make a new daughter board Making a new daughter board would
have allowed much more flexibility in device selection. It would also have
required a decent amount of time to assemble and would have cost significantly more than any of the other options. However, it is by far the cleanest
and most durable choice.
Create a printed circuit board that mates with the ZIF Depending on the design of the PCB it could have been very time consuming,
but would have been cheaper than using a socket converter. De-soldering
and re-soldering burned-out chips would have been a slow and potentially
destructive process. However, a socket could have been used on the PCB,
making switching chips easy. This option would not work with high-speed
devices because of design and manufacturing considerations for high-speed
PCB's. There would have been almost absolute freedom in the choice of
devices. This solution would not have worked with the PLCC sockets.
Use a socket converter The socket converter was the fast and easy
solution. The expense was still within the team's budget and was both
cheaper than creating a new daughter board and less time consuming than
creating a new interface.
8.10 Some of the most frequently used BT-BASIC commands used are: msi Changes default working directory. Mass storage is Same as “msi” cat Catalogs (list)the node names in the specified directory. get Brings the contents of a file into the system workspace. load Same as “get”. msi$ Returns the directory pathname of the current working directory. msi “..” Backs up one directory level. findn Locates the next occurrence of the a given sting in the workspace. 8.11 If you wish to invoke the HP Board Graphics Viewer, type board graphics at the BT-BASIC command line and press the “ENTER” key on the keyboard. 8.12 A HP Board Graphics Viewer window should now appear
Comments
Post a Comment