Browse Prior Art Database

Microprogrammed Folder Substituter for Printers

IP.com Disclosure Number: IPCOM000055482D
Original Publication Date: 1980-Jul-01
Included in the Prior Art Database: 2005-Feb-13

Publishing Venue

IBM

Related People

Authors:
Brunsvold, DT [+details]

Abstract

Printers attached to computer systems normally do not print both upper and lower case alphabetic characters, but such printing is possible by code folding, as described in U. S. Patent 3,343,131. The present arrangement is an improvement and provides folding/substituting in the printer adapter using the 191 locations with addresses from hexadecimal 40 through hexadecimal FE inclusive in 256-bit random-access storage 110 (Fig. 1B) in printer adapter 100. These 191 addresses correspond to hexadecimal codes for 191 predefined standard graphic characters.