NCR 7870 Casio 4-Bit, Parallel, Dual Cable Hex a tag, IBM 1520 BRC, IBM 468x/9x Port 4B Hex B tag

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.