campbellb@viking.UUCP (Brian Campbell) (03/06/90)
I tried doing some simple graphics programming recently on somebodies recently aquired PC clone. I tried accessing the EGA graphics using the BASIC commands SCREEN 7 and also 8,9, and 10. It resulted some type of function call error. Accessing CGA graphics via SCREEN 1 and 2 worked OK. This suggests that the PC does not have EGA graphics. But the bill of sale shows that computer has EGA graphics. How can I tell for sure? If EGA is installed, then how do I get it to work in GWBASIC? Am I even interpretting the BASIC manual properly? BTW, when going from screen 0 to screen 1 to screen 0, the display changes from 80 columns to 40 columns. How do change back to 80 columns again? Is there a simple command? When going to screen 0 to screen 2 to screen 0, I do get 80 columns again, but the characters are cyan on a yellow background. Using PALETTE 0,0 creates a black background again. I understand how PALETTE works in screen 1 (and screen 2) I think, but not in the screen 0 text mode. Please explain how to get around these difficulties. One more question: is there a simple way to get rid of the BASIC function key descriptions at the bottom of the screen that occurs in the graphics modes? Please email a response. I do not regularly read the ibm.pc user group. Thanks in advance.