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7-16 Chapter 7: Programming
Casio 4-Bit, Parallel, Dual Cable – Hex A tag
Non-NCR short format is used on some older competitive terminal
systems. This format is sometimes called 6-bit ASCII since it can
accommodate only 6 data bits per character. It cannot support
Code 128 or Code 39 bar code data. This format is normally not used
on NCR systems. Use the Hex A tag to enable this protocol.
IBM 1520 (BRC, IBM 468x/9x Port 4B) – Hex B tag
All models of the NCR 7870 support the IBM 468x/9x format and use
the same protocol found on IBM terminals. The scanner uses terminal
port 17 and the select address is set to 4B.
If your unit is a scanner/scale, the IBM address default setting is to 6E,
but can be programmed to 6A or 6B. The IBM terminal integrated
scanner/scale driver normally uses address 6E. However, if the
scanner works but the scale does not, try using the other two scale
addresses. Use the Hex B tag to enable this protocol.
TEC, 4-Bit, Parallel, Dual Cable – Hex C tag
The TEC 4-Bit Parallel protocol is used when connecting the NCR 7870
Scanner/Scale to a TEC M-XXXX host terminal. This configuration
uses two cables. The scanner uses an OCIA interface and the scale uses
a 4-bit parallel interface. Use the Hex C tag to enable this protocol.