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- Path: sparky!uunet!sun-barr!sh.wide!wnoc-tyo-news!ccut!wsclark!lab!tsuda!hit!santa
- From: santa@hit.cc.hit-u.ac.jp (Ogawa Hiroshi)
- Newsgroups: comp.sys.palmtops
- Subject: Re: hp95 graphics
- Message-ID: <3148@hit.cc.hit-u.ac.jp>
- Date: 20 Aug 92 01:32:03 GMT
- References: <2A9143C7.6162@ics.uci.edu>
- Reply-To: santa@hitcc.cc.hit-u.ac.jp (Ogawa Hiroshi)
- Organization: Hitotsubashi Univ.,Japan
- Lines: 30
-
- In article <2A9143C7.6162@ics.uci.edu> shi@ics.uci.edu (Edmond C. Shi) writes:
- >--------------------------------
- > What is the difference between int10 and int 20 calls.
- > it seems like there are two ways to set the graphics mode (one
- > each way) and i'm not sure what the differences are. if
- > i set graphics mode using the int20 calls, will int10 functions
- > such as scroll area work.
-
- INT 20h is used by DOS to terminate program. I don't think it is possible
- to change video mode using INT 20h.
-
- There's two way to change video mode on HP95LX.
-
- (1) INT 10h, AH=0 Normal PC-BIOS Function
- (2) INT 5Fh, AH=0 HP95LX Extended BIOS Function
-
- The latter function will finally call INT 10h, I think. So the functions
- provided by INT 10h may be used even if you used INT 5Fh to change video mode.
-
-
- >2) does int10 read/write area work properly. it seems not for me.
-
- I don't know INT 10h funcitons to read or write specified area.
- So I've never used them. Can you teach me the function numbers?
-
- --
- Hiroshi Ogawa
- Assistant Professor
- Kanto-Gakuen Univ.
- Gunma-Ken, Japan
-