diff options
| author | hpa <hpa> | 2002-06-17 01:08:23 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2002-06-17 01:08:23 +0000 |
| commit | 59c1249ed12543c49b4d68c00fbd2a81842912be (patch) | |
| tree | 8af91a97abf7a40579e5852788a6a284ba551686 /comboot.doc | |
| parent | 2a8107a220e75a83bd030ba03c92906ac0dd72e0 (diff) | |
| download | syslinux-59c1249ed12543c49b4d68c00fbd2a81842912be.tar.gz | |
Support reporting extended characters as <NUL>...; use a stack register
frame for INT 21/22.
Diffstat (limited to 'comboot.doc')
| -rw-r--r-- | comboot.doc | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/comboot.doc b/comboot.doc index 668a4093..77406d60 100644 --- a/comboot.doc +++ b/comboot.doc @@ -147,8 +147,10 @@ INT 21h AH=4Ch Terminate program INT 21h AH=01h Get Key with Echo Reads a key from the console input, with echo to the console - output. The read character is returned in AL. - + output. The read character is returned in AL. Extended + characters received from the keyboard are returned as NUL (00h) + + the extended character code. + INT 21h AH=02h Write Character Writes a character in DL to the console (video and serial) @@ -157,7 +159,8 @@ INT 21h AH=02h Write Character INT 21h AH=04h Write Character to Serial Port Writes a character in DL to the serial console output - (if enabled) only. + (if enabled.) If no serial port is configured, this routine + does nothing. INT 21h AH=08h Get Key without Echo |