joncampbell123/dosbox-x
1
0
Fork 0
mirror of https://github.com/joncampbell123/dosbox-x.git synced 2025-10-14 02:17:36 +08:00
Code Issues Packages Projects Releases Wiki Activity

more syntax revision

Browse Source
This commit is contained in:
Jonathan Campbell
2020-06-01 02:02:13 -07:00
parent ea07197d1a
commit b88035cfdd
1 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
doc-collection/interrupts/ms-dos/int21.dil
View File

@@ -72,9 +72,9 @@ interrupt "MS-DOS INT 20" {
content value 0x00;
description "Return code set to 00h";
}
exists_if dos_version >= version(1.0);
exists if dos_version >= version(1.0);
description "Terminate the process. Return code aka error level is set to 00h.";
see_also interrupt "MS-DOS INT 21" select by register AH value 0x00;
see also interrupt "MS-DOS INT 21" select by register AH value 0x00;
}
interrupt "MS-DOS INT 21" {
@@ -92,7 +92,7 @@ interrupt "MS-DOS INT 21" {
content value 0x00;
description "Return code set to 00h";
}
exists_if dos_version >= version(1.0);
exists if dos_version >= version(1.0);
description "Terminate the process. Return code aka error level is set to 00h.";
notes "Microsoft recommends using INT 21/AH=4Ch for DOS 2+. This function sets the program's return code (ERRORLEVEL) to 00h. Execution continues at the address stored in INT 22 after DOS performs whatever cleanup it needs to do (restoring the INT 22,INT 23,INT 24 vectors from the PSP assumed to be located at offset 0000h in the segment indicated by the stack copy of CS, etc.). If the PSP is its own parent, the process's memory is not freed; if INT 22 additionally points into the terminating program, the process is effectively NOT terminated. Not supported by MS Windows 3.0 DOSX.EXE DOS extender" citation rbil;
@@ -120,7 +120,7 @@ If the program is returning to COMMAND.COM, control transfers to the resident po
content "character" type uint8_t;
description "Character value read";
}
exists_if dos_version >= version(1.0);
exists if dos_version >= version(1.0);
description "Read from STDIN, with CTRL+C/CTRL+BREAK checking and some CTRL combinations handled by the console automatically";
notes "^C/^Break are checked, and INT 23 executed if read. ^P toggles the DOS-internal echo-to-printer flag. ^Z is not interpreted, thus not causing an EOF if input is redirected. Character is echoed to standard output. Standard input is always the keyboard and standard output the screen under DOS 1.x, but they may be redirected under DOS 2+" citation rbil;
@@ -142,10 +142,10 @@ If the standard input is not redirected, and the character read is a Ctrl-C, an
}
output register AL citation rbil {
content "character" type uint8_t;
exists_if dos_version >= version(2.1);
exists if dos_version >= version(2.1);
description "Last character output, despite official docs which state nothing is returned. MS-DOS 2.1 to 7.0 at least.";
}
exists_if dos_version >= version(1.0);
exists if dos_version >= version(1.0);
description "Write to STDOUT, with CTRL+C/CTRL+BREAK checking";
notes "^C/^Break are checked, and INT 23 executed if pressed. Standard output is always the screen under DOS 1.x, but may be redirected under DOS 2+. The last character output will be the character in DL unless DL=09h on entry, in which case AL=20h as tabs are expanded to blanks. If standard output is redirected to a file, no error checks (write- protected, full media, etc.) are performed" citation rbil;
@@ -165,7 +165,7 @@ If a Ctrl-C is detected at the keyboard after the requested character is output,
content "character" type uint8_t;
description "Character value read";
}
exists_if dos_version >= version(1.0);
exists if dos_version >= version(1.0);
notes "Keyboard checked for ^C/^Break, and INT 23 executed if detected. STDAUX is usually the first serial port" citation rbil;