47 lines
1.3 KiB
Plaintext
47 lines
1.3 KiB
Plaintext
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{* WARNING WARNING WARNING WARNING WARNING WARNING WARNING
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In order to use the Intr procedure in Turbo Pascal you
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must be familiar with interrupts and have access to a
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technical reference manual.
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The following program uses the Intr function in Turbo to
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get the time. Registers have to be set correctly according
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to the DOS technical reference manual before the function
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is called.
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The program simply returns the time in a string at the top
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of the screen.*}
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program TimeInterrupt;
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type
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TimeString = string[8];
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function time: TimeString;
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type
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regpack = record
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ax,bx,cx,dx,bp,si,di,ds,es,flags: integer;
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end;
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var
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recpack: regpack; {assign record}
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ah,al,ch,cl,dh: byte;
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hour,min,sec: string[2];
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begin
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ah := $2c; {initialize correct registers}
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with recpack do
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begin
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ax := ah shl 8 + al;
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end;
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intr($21,recpack); {call interrupt}
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with recpack do
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begin
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str(cx shr 8,hour); {convert to string}
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str(cx mod 256,min); { " }
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str(dx shr 8,sec); { " }
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end;
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time := hour+':'+min+':'+sec;
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end;
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begin
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writeln(time);
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end.
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