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Modified Printer Having All-Points-Addressable and Graphics Capability

IP.com Disclosure Number: IPCOM000040702D
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Barksdakem, ID: AUTHOR [+3]

Abstract

A resistive ribbon printer, which does not support all-points-addressable (APA) or graphics fonts, is capable of printing APA and graphics data through inactivating the printer's fonts and supplying data serially to the printer from a random-access memory (RAM) when a personal computer (PC) provides signals that such APA and/or graphics data are to be printed. A printer control card 1 produces FNTCLK signals to a font card 2 having fonts A and B therein. The FNTCLK signals cause either characters from the font A or the font B to be supplied to the printer control card 1 from the font card 2.

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Modified Printer Having All-Points-Addressable and Graphics Capability

A resistive ribbon printer, which does not support all-points-addressable (APA) or graphics fonts, is capable of printing APA and graphics data through inactivating the printer's fonts and supplying data serially to the printer from a random-access memory (RAM) when a personal computer (PC) provides signals that such APA and/or graphics data are to be printed. A printer control card 1 produces FNTCLK signals to a font card 2 having fonts A and B therein. The FNTCLK signals cause either characters from the font A or the font B to be supplied to the printer control card 1 from the font card 2. When APA and/or graphics data are to be printed, software in a PC 3 causes an APA Enable Command signal to be supplied therefrom via a bus 4 to a function pack 5, which is mounted on the printer, that the next information to be printed is APA and/or graphics data. Prior to the software in the PC 3 transmitting the APA Enable Command signal to the function pack 5, an APA font data RAM 6 is loaded from the PC 3 with the data that will cause the desired APA and/or graphics data to be printed when the data are supplied to the printer control card 1. The APA Enable Command signal causes the function pack 5 to supply a high APA Enable signal via a function pack adapter card 7 to the font card 2 to disable the FNTCLK signal to the font card 2. Disabling of the FNTCLK signal to the font card 2 inhibits transmittal...