Article View: comp.sys.ibm.pc
Article #8721Re: Why no graphics in text mode?
From: rob
Date: Tue, 16 Jan 1990 20:17
Date: Tue, 16 Jan 1990 20:17
13 lines
1101 bytes
1101 bytes
It's possible - difficult and hardware-specific, but possible - to put graphics on the screen in text mode by reprogramming the character set. This can be done on the EGA and VGA, though not on the CGA. The 'line drawing' characters defined in the IBM extended ASCII set allow this to a limited extent, but by defining your own characters, you can create the illusion of bit-mapped graphics in text mode. IBM put out an EGA demo program several years ago that used this technique. I believe it was called FantasyLand. A good book dealing with this is Richard Wilton's 'Programmer's Guide to the PC and PS/2 Video Systems'.
Technical Details
Message-ID:
<206900161@prism>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!mit-eddie!bu.edu!bu-cs!mirror!prism!robReferences:
<25820@cup.portal.com>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!mit-eddie!bu.edu!bu-cs!mirror!prism!rob From: rob@prism.TMC.COM Newsgroups: comp.sys.ibm.pc Subject: Re: Why no graphics in text mode? Message-ID: <206900161@prism> Date: 16 Jan 90 20:17:00 GMT References: <25820@cup.portal.com> Lines: 13 Nf-ID: #R:cup.portal.com:-2582000:prism:206900161:000:639 Nf-From: prism.TMC.COM!rob Jan 16 15:17:00 1990