Path: utzoo!attcan!uunet!husc6!uwvax!oddjob!gargoyle!att!alberta!teletron!adec23!mark
From: mark@adec23.UUCP (Mark Salyzyn)
Newsgroups: comp.sys.ibm.pc
Subject: MSC coded replacement for COMMAND.COM
Keywords: Turnkey application, what must I initialize? what must be trapped?
Message-ID: <1284@adec23.UUCP>
Date: 24 May 88 15:46:04 GMT
Distribution: na
Organization: ADEC Systems Inc., Edmonton, Alberta
Lines: 33

In CONFIG.SYS:
	SHELL=HELLO.EXE
In HELLO.C:
	main ()
	{
		for (;;)
			cprintf ("Hello World\r\n") ;
	}
cprintf is a console only printf (yes I tried printf with similar results.)
I tried replacing cprintf with:
	cprintf (cp)
		register char *cp ;
	{
		while (*cp)
			bdos (6, *(cp++)) ;
	}
The machine just stops after initial setup with a cursor on Left Top Corner,
no activity, but rebootable. Control C does exite a `^C' on screen, but thats
it.

I want to replace command.com with my own simple menu driver to save floppy
disk space for a turnkey application. I assume some initialization that my
MSC compiler (version 3.0 here) is not getting performed and some runtime
library routine is STOPPED UP, and/or some vector must be trapped? Am i missing
something (of course I am). I assume that if it is a runtime routine, 4.0 and
up probably have solved the problem?

After that question is solved, what about the trapping of 0x22, 0x23 and 0x24?

Thanks in advance, post if small, mail if long.

-- Stamp out long .sigs
alberta!{teletron,uofaee}!adec23!mark Mark Salyzyn