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From: rich@pro-exchange.cts.com (Rich Sims)
Newsgroups: comp.sys.apple
Subject: Re: IIgs Software Reboot
Message-ID: <15960.apple.info-apple@pro-exchange>
Date: 14 Dec 89 04:32:28 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 37

In-Reply-To: message from Les_Ferch@MTSG.UBC.CA

> I need a routine that will reboot a IIgs in the same way that
> pressing Control-Apple-Reset does.  I already have the program
> sreset.sys, but it's just a little too severe for my needs because
> it clears the /RAM5 volume.

> My thanks in advance for anyone who can post Hex,
> assembler, or Applesoft code that will do the trick.

OK, hex, assembler, or Applesoft (not in that order)

Applesoft:      POKE 1012,0 : CALL 64098

8-bit hex/assembler:    92 F4 03        STZ 03F4
                        4C 62 FA        JMP FA62

Now it gets tricky.... full native mode.....

        I don't know an "elegant" way that's quick, easy, and that will
        always work - I'd use the exact same code as shown in the 8-bit
        mode above, but kick in emulation mode first!  :-)

All that stuff does exactly the same thing -- zaps the power-up byte and calls
a reset routine in the monitor -- it ought to work on any GS that can still
emulate an Apple II, but I've only checked it on my ROM 01 machine.

Non-GS owners can do exactly the same thing - but the 6502 doesn't understand
the STZ instruction, so you'll have to store the 0 with an LDA-STA pair.  An
INC or DEC should also work, since all you should "really" have to do is
*change* the value at $03F4, not necessarily zero it.

-Rich Sims-

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