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Int 21 Fn 25C3 P - Phar Lap 386/dos-extender - Execute Program [E]
AX = 25C3h
ES:EBX -> pointer to parameter block (see below)
DS:EDX -> pointer to ASCIZ program filename
Return: CF clear if successful
all registers unchanged
CF set on error
EAX = error code (see below)
Values for error code:
01h function code in AL is invalid ???
02h file not found or path invalid
05h access denied
08h insufficient memory to load program
0Ah environment invalid
0Bh invalid file format
Format of parameter block:
Offset Size Description
00h DWORD 32-bit offset of environment string
04h WORD segment selector of environment string
06h DWORD 32-bit offset of command-tail string
0Ah WORD segment selector of command-tail string
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