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Method of Defining Cartridges for the Quietwriter Printer

IP.com Disclosure Number: IPCOM000059948D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 14K

Publishing Venue

IBM

Related People

Carter, KE: AUTHOR [+4]

Abstract

A method is described to allow selection of type styles on a printer without prompting the operator. The DisplayWrite 3 (DW3) cannot prompt for operator printer intervention because DW3 must support DOS background print, DW3 background print, and other functions. Therefore, printer intervention must be handled by the printer, and all controls must be in the file sent to the printer. The QuietWriter printer is supported on DW3. It has internal slots for two printhead cartridges: "slot A" and "slot *." The cartridges are removable in the same manner as printwheels on printwheel printers. Only one slot can be active at any time. The printer accepts and executes commands to change active slots and to pause to wait for the start button. There is no indicator on the printer to give the operator a message.

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Method of Defining Cartridges for the Quietwriter Printer

A method is described to allow selection of type styles on a printer without prompting the operator. The DisplayWrite 3 (DW3) cannot prompt for operator printer intervention because DW3 must support DOS background print, DW3 background print, and other functions. Therefore, printer intervention must be handled by the printer, and all controls must be in the file sent to the printer. The QuietWriter printer is supported on DW3. It has internal slots for two printhead cartridges: "slot A" and "slot *." The cartridges are removable in the same manner as printwheels on printwheel printers. Only one slot can be active at any time. The printer accepts and executes commands to change active slots and to pause to wait for the start button. There is no indicator on the printer to give the operator a message. Each cartridge supports one codepage and one typestyle. Typestyles are grouped by pitch. There are many different typestyles supported in the different codepages. DW3 supports codepages 256, 259, and the Personal Computer (PC) codepage 437. The printer can be set up to use two cartridges which allow two typestyles, two codepages, or any combination for the two slots. Which cartridges to use is determined by DW3. DW3 Print Task must know which slot contains which codepage and what the typestyle and pitch are of the cartridge in order to determine which slot should be active. The operator sets up default values for the cartridges with the DW3 Change Printhead menu. The default values define what cartridges are in the printer at the time that DW3 Print Task loaded. The Change Printhead menu can also be chosen at the time the print job is submitted so that the operator can tell Print Task that different cartridges should be used to print a particular job. The default values of the cartridges or the values from the Change Printhead menu, if it has been changed, are stored with the other variables for the job in a print control block. This allows the Change Printhead menu choices to be honored if the job is not ready to be printed immediately but is in the queue to be printed. If the new values for "slot A" and "slot *" are different than what Print Task believes is in the printer, Print Task issues a pause command to the printer. A pause command is put into the output file. When the printer processes the pause, it halts and waits for the start button to be pressed. The Change Printhead menu allows the operator to specify from 1 to 3 cartridges for "slot A," "slot *" and "slot * alternate." Each cartridge is identified by character set (codepage) and typestyle number. "Slot *" and "slot * alternate" can be swapped back and forth to give the operator support of three cartridges. A t...