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- From: chip@ac.dal.ca
- Newsgroups: comp.lang.pascal
- Subject: Saving VGA screen graphic screen to memory.
- Message-ID: <1992Jul30.235035.6751@ac.dal.ca>
- Date: 30 Jul 92 23:50:35 -0300
- Organization: Dalhousie University, Halifax, Nova Scotia, Canada
- Lines: 22
-
- Hi all,
-
- I have a question about saving a VGA graphics screen. Like how you
- do it?? :)
-
- I know a 640x480*16 screen is 150k large. I also know that the VGA memory
- segment is A000:0000. However, the segment is only 64k. I assume that some
- sort of virtual memory is used to store all the information (in layers??
- bit planes?) But I do not know how to access it.
-
- I have heard a little about the CRTC controler? But nothing good.
-
- I have also heard of a book called "Programmer's Guide to PC and PS/2 Video
- Systems" (microsoft press) I have looked locally for this book but haven't
- found it.
-
- Can anyone help me save a VGA screen...Any code would be appricated, either
- in TP, ASM, C, or BASIC(ick!)
-
- Please EMAIL me at CHIP@AC.DAL.CA
- Thanks ... Mark Klaamas
-
-