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The Turbo printer unit expects LPT1 not COM1. So your code is NOT going to work. Also Windows does not generally allow DOS applications to print unless it is specifically set up. See You only need to look at the top part. You could try the following code (NOT guaranteed to work). You won't need the printer unit for this one.

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Var Lst: text; begin Assign(Lst, 'COM1'); Rewrite(Lst, 'Hello world'); Close(Lst); end. Possibly it will write to COM1. This is straight out of the Turbo book except I have substituted COM1 for LPT1. Texas Drivers License Office Townhurst Drive Houston Tx. I had eact the same printer myself and it is a GDI printer which emulates DOS-printing by a windows driver. I had terrible problems printing from DOS applications as a result. Two sources of knowledge (I hope those links are permanent;-) ) 1) HP telling that it wont work unter NT and so on - see 2) A very basic 'troubleshooting guide' to check whether the printer works from your DOS-Box or wont work.

For some (very general) information HP gives about this printer. I'm afraid, but I trashed that printer for that exact reason and bought another one. HP hotline told me that any HP deskjet printer I can buy at the store nowadays supports plain DOS again. They said they realized the savings where not worth the trouble.

Here are several links to various DOS software and other DOS related websites. Most are freeware but a few are shareware and commercial programs. I welcome any comments and/or suggestions you may have about this webpage or other DOS programs for me to know about. Also, do email a thank you to the authors of any of the programs you use.

If you like to see Interesting Windows and Mac programs similiar to this page, visit my computer user group, the Browse the Interesting DOS programs site with each DOS program category having its own page: Comments? My E-mail address: Dev Anand Teelucksingh, devtee at gmail.com. (updated July 10 2017) • installable filesystem TSR to map a drive from a Linux computer to a DOS drive letter using Ethernet frames (no TCP/IP stack needed) • Anatoly Shashkin's podcasts and videos about DOS games • A GNU GPLed version of DOS, 23 years in the making.

Also has lots of DOS-related news • DOSMid is a text mode MIDI and MUS player for DOS that can run on a 8086 CPU • save entire or occupied portion of a hard drive partition (FAT16/32,ext2,ext3,NTFS) into a file for easy backup and restoration • Disk image backup and restore program. Supports FAT, FAT32, NTFS partitions and most writable USB, IEE1394 drives, ATAPI CD/DVD drives without special drivers.