HP LaserJet 4 Service Manual - Page 283

AUTOEXEC.BAT Standard Configurations Parallel DOS Commands If the previous check did not produce the desired result, ensure that the AUTOEXEC.BAT file contains the following statements for parallel interface communications: MODE LPT1:,,P For MS-DOS version 4.0 and above, enter: MODE LPT1:,,B Note This example assumes that you are using parallel printer port LPT1. If you are using LPT2 or LPT3, replace LPT1 in the example with the appropriate printer port. If the problem persists, proceed to Table 7-30 "Communications Checks." Serial MS-DOS Commands Most IBM compatible computers default to a parallel printer port. To ensure that information is sent to your serial printer port, type the following MS-DOS commands at your MS-DOS prompt, or include them in your AUTOEXEC.BAT file. MODE COM1:9600,N,8,1,P MODE LPT1:=COM1 For MS-DOS version 4.0, or above, enter: MODE COM1:9600,N,8,1,B MODE LPT1:=COM1 Note These examples assume that you are using serial printer port COM1. If you are using COM2 or COM3, replace COM1 with the appropriate printer port. If the problem persists, proceed with the following checks in Table 7-30. Troubleshooting 7-53