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- {* WARNING WARNING WARNING WARNING WARNING WARNING WARNING
-
- Do not try to use the MsDos function call unless you are
- very familiar with the operating system and have technical
- information available to you!
-
- The following program uses the MsDos command in Turbo to
- retrieve the system date. This is achieved via DOS function
- call 42 (or 2A hex). The function call is placed in the AH
- register according to the technical reference manual.
-
- Type in the following code. The only output is the date
- at the top of your screen.*}
-
- program GetDate;
- type
- DateStr = string[10];
-
- function Date: DateStr;
- type
- regpack = record
- ax,bx,cx,dx,bp,si,di,ds,es,flags: integer;
- end;
-
- var
- recpack: regpack; {record for MsDos call}
- month,day: string[2];
- year: string[4];
- dx,cx: integer;
-
- begin
- with recpack do
- begin
- ax := $2a shl 8;
- end;
- MsDos(recpack); { call function }
- with recpack do
- begin
- str(cx,year); {convert to string}
- str(dx mod 256,day); { " }
- str(dx shr 8,month); { " }
- end;
- date := month+'/'+day+'/'+year;
- end;
-
- begin
- writeln(date);
- end.