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Pascal Super Library (CW International)(1997).bin
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SWAG
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SWAGA_C
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CURSOR.SWG
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0017_CURSOR Control.pas
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Pascal/Delphi Source File
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1993-10-28
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3KB
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126 lines
{===========================================================================
Date: 08-27-93 (14:17)
From: LIM FUNG
Subj: cursor control
WD>Hi All,
WD> Hey, someone put a couple of little proc. on here which control the
WD>cursor (turn it on/off) and they were written in assembler. I had a
WD>brain fade and forgot to save the name of the person who created these
WD>routines. I was wondering if they might know how to get a big cursor
WD>also using assembler. Also, do they work on monochrome monitors, or was
WD>that what you meant about the 8x8 scan lines?
Okay, a simple procedure to turn on and off the cursor would be as
follows: }
Uses DOS;
Procedure CursorOn;
Begin
asm
mov ax,0100h
mov cx,0607h
int 10h
end;
end;
Procedure CursorOff;
Begin
asm
mov ax,0100h
mov cx,2020h
int 10h
end;
end;
end.
===========================================================================
BBS: Canada Remote Systems
Date: 10-23-93 (07:59) Number: 9355
From: LOU DUCHEZ Refer#: NONE
To: JESSE MACGREGOR Recvd: NO
Subj: help Conf: (1617) L-Pascal
---------------------------------------------------------------------------
JM>I need help I need a function that when I give it a screen coordiante
JM>and it returns the charachter at that coordinate on a text screen
JM>(80x25) and possibly the color...
Try this:
-------------------------------------------------------------------------------
type videolocation = record { video memory locations }
videodata: char; { character displayed }
videoattribute: byte; { attributes }
end;
---------------
procedure getvideodata(x, y: byte; var result: videolocation);
{ Returns the attribute byte of a video character. }
var vidptr: ^videolocation;
begin
if memw[$0040:$0049] = 7 then vidptr := ptr($b000, 2*(80*(y-1) + (x-1)))
else vidptr := ptr($b800, 2*(80*(y-1) + (x-1)));
result := vidptr^;
end;
-------------------------------------------------------------------------------
JM>also, a procedure to make that icky
JM>cursor go away would be greatly appreciated...
There's not really a procedure to make it "go away", just to change it.
You CAN change it so that it's undisplayable, but you'll want to store
the previous config first. Like so:
-------------------------------------------------------------------------------
var crstyp: word;
---------------
procedure cursoff;
const ffff: word = $ffff;
{ Turns the cursor off. Stores its format for later redisplaying. }
begin
asm
mov ah, 03h
mov bh, 00h
int 10h
mov crstyp, cx
mov ah, 01h
mov cx, ffff
int 10h
end;
end;
---------------
procedure curson;
{ Turns the cursor back on, using the cursor display previously stored. }
begin
asm
mov ah, 01h
mov cx, crstyp
int 10h
end;
end;
-------------------------------------------------------------------------------
How's that, o evil masters?
---
■ KingQWK 1.05 # 182 ■ "Bob" -- the Doc Savage of holy men
■ RoseMail 2.10ß: ILink: PC-Ohio * Cleveland, OH * 216-381-3320