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check for unsupported function call in console - from dosemu2/fdpp bug# 101 fix see c6efa7a203

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Kenneth J Davis 2021-07-22 21:21:01 -04:00
parent 00daebd468
commit 516a4e7e55
1 changed files with 2 additions and 0 deletions
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kernel/console.asm
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@ -156,6 +156,8 @@ CommonNdRdExit: ; *** tell if key waiting and return its ASCII if yes
add ah,[cs:_kbdType] add ah,[cs:_kbdType]
int 16h ; Get status, if zf=0 al=char int 16h ; Get status, if zf=0 al=char
jz ConNdRd4 ; Jump if no char available jz ConNdRd4 ; Jump if no char available
or ax,ax ; Also check for ax=0 as apparently some
jz ConNdRd4 ; int16h handlers set ax=0 to indicate unsupported function
call checke0 ; check for e0 scancode call checke0 ; check for e0 scancode
or ax,ax ; Zero ? or ax,ax ; Zero ?
jnz ConNdRd1 ; Jump if not zero jnz ConNdRd1 ; Jump if not zero