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Newer Epson Printers and Character Sets |
The information in this document applies to:
WordPerfect® 5.1 for DOS
Problem
Solutions: A customer was having trouble printing the cent sign using the Compose feature while using his printer in graphic mode rather than italic mode. Here is an explanation about character sets on the newer Epson printers (ESC/P2 level, which include the Epson LQ-570, Epson LQ-870, Epson LQ-1070, Epson LQ-1170 and Epson ActionPrinter 3250). These printers handle character sets a little differently than in the past. From a list of several character tables, the driver must initialize 4 that it can use during printing (you can see this in the Initialize portion of the driver as ep2chtbl[n,n,n]. WPCorp chose the four most complete sets to work with. Development assumed that dip switches in the driver would be set to defaults. Therefore, they failed to initially set the printer to character set 0 (as the driver perceives it). The driver is assuming that WP is starting with set 0 from the 4 that WP selected. In this customer's situation, when printing only the cent symbol (which is in set 0), the driver assumes WP does not need to make a switch (although the customer set the initial character set differently in the dip switches). However, when a document is printed with several characters, one is bound to come from one of the other character sets, thus requiring the driver to switch to that character set and then back to set 0. That is why it would print in some cases but not when it appears alone in a document. Development will add an initialization command to the driver to set it to character set 0 before any print job so that this will not be a problem (regardless of which character set is selected in the dip switches). However, this customer would have to wait for the next release to get the change. You can help the customer edit his .PRS file and add the command: 1. Enter the PTR Program and retrieve the .PRS file 2. Highlight Initialize and Reset, and press Enter 3. Highlight Initialize at Start of Print Job, and press Ctrl-Enter. This will take you to the editing window at the bottom of the screen. 4. Scroll past all the codes in the window to the end of the last ep2chtbl[n,n,n] code 5. Add the command [27]"t"[0], similar to the other commands. This will initialize the printer to character set (or table) 0. 6. Exit each level with F7 and save the PRS file |
Answer:
Details:
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