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From: ForthNet@willett.pgh.pa.us (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: Graphics
Message-ID: <2677.UUL1.3#5129@willett.pgh.pa.us>
Date: 26 Apr 91 00:30:11 GMT
Organization: (n.) to be organized.  But that's not important right now.
Lines: 38


 Date: 04-22-91 (07:11)              Number: 1965 of 1988 (Echo)
   To: ALL                           Refer#: NONE
 From: BILL TEEGARDEN                  Read: HAS REPLIES
 Subj: EGA SCREEN UTILITIES          Status: PUBLIC MESSAGE
 Conf: FORTH (58)                 Read Type: GENERAL (+)

 I am looking for a Forth utility program that will allow me to throw EGA
 screens up quickly and remove them quickly. I wrote a similar utility in
 Pascal for CGA, but I have drawn a blank in Forth.

 Does anyone know of such an animal?

 Bill Teegarden

 NET/Mail : LMI Forth Board, Los Angeles, CA (213) 306-3530
 <<<>>>

 Date: 04-22-91 (07:46)              Number: 1966 of 1988 (Echo)
   To: BILL TEEGARDEN                Refer#: NONE
 From: RAY DUNCAN                      Read: NO
 Subj: EGA SCREEN UTILITIES          Status: PUBLIC MESSAGE
 Conf: FORTH (58)                 Read Type: GENERAL (+)

 The problem is that the higher-resolution graphics modes are more
 complex to handle.  The memory is organized as bit planes, so you have
 to select each bit plane and then read out all its memory, select the
 next and read its memory, and so on.  This is the way @BLOCK and !BLOCK
 work, and their code is quite efficient, so you might want to just build
 your screen save/restore logic on top of @BLOCK/!BLOCK.

 NET/Mail : LMI Forth Board, Los Angeles, CA (213) 306-3530
 <<<>>>
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