[net.games] infocom games and ms-dos

wa2sff@hounx.UUCP (J.WILKES) (02/24/86)

I recently purchased amfv and as far as i can tell it is a true
ms-dos game.
The external documentation said PC-DOS but the internal documention appeared
to be for a generic ms-dos game.
The game is not copy protected and can be loaded on a hard disk.
It should work on any ms-dos computer but I would get agreement from the
dealer that you can return it if it doesn't work.
They do have a crude form of copy protection in that there is
a decoder that is necessary to enter the simulation mode.
I had no trouble with amfv on the AT&T PC6300.
Joe Wilkes

andrews@calgary.UUCP (Keith Andrews) (02/25/86)

> I recently purchased amfv and as far as i can tell it is a true
> ms-dos game.
		...
> Joe Wilkes

I was going to hold off posting to the original query for a few more days
(to see if anyone else had a better response), but Joe's posting about AMFV
made me change my mind.  Here's why:

First, the INFOCOM games labeled "IBM and MS-DOS compatibles 64K required"
*will* run on any MS-DOS machine.  I guess INFOCOM finally came to their
senses and realized that not all MS-DOS machines are IBM clones.  There is a
setup program included with each game to configure the game to the appropriate
machine (# of lines, ANSI support, etc).  There are installation scripts for
both floppies and hard disks as well.

Second, AMFV is labeled for "IBM and PC-DOS 128K required".  The reason
that PC-DOS is stipulated is that unlike the MS-DOS varieties, AMFV make
calls to the IBM BIOS.  Actually the only BIOS call is an INT 10H (video)
for scrolling the screen.  Some not-too-compatibles support the IBM BIOS
calls if nothing else and will work, others (such as my Zenith Z-100) just
get a wild interrupt when the call is issued.  In order to get AMFV to work
on my machine, I had to write a program to sit in the background and
intercept the INT 10H call.

I guess the main point of the message is that non-clone users should be
cautious when purchasing "PC-DOS" software.

						Keith Andrews
					   alberta!calgary!andrews