XT 5160

[Erik Klein]

On Wed, May 4, 2005 8:57 pm, Fred Cisin said:
>
> Eric is right, of course, but IBM (and particularly some third party
> IBM dealers, such as Computerland) also liked to bundle a few products
> together.
> Since low level format of hard drives was only available in the
> "Advanced Diagnostics", if you bought a machine and OS at the same
> time, IBM would gladly "install" it.
>
> PC-DOS 1.00 was released simultaneously with the 5150. (8/11/1981)
>
> PC-DOS 1.10 added support for double sided drives.
>
> PC-DOS 2.00 was released simultaneously with the availability of the XT,
> and added support for 9 sectors per track (v 8), subdirectories, and hard
> drives.
>
> PC-DOS 2.10 was released simultaneously with the PCJr and "portable PC",
> and slowed down disk access for the lousy Qume 142 drives
>
> PC-DOS 3.00 was released simultaneously with the AT, and added support for
> 1.2M floppies.
>
> PC-DOS 3.10 added the network redirector and a few other items.
>
> PC-DOS 3.20 added support for 720K 3.5" drives.
>
> PC-DOS 3.30 was released simultaneously with the PS/2s, and added support
> for 1.4M drives.
>
> PC-DOS 4.00 added support for hard drives > 32M
>
> PC-DOS 5.00 add some bundled software
>
> PC-DOS 6.10 added bundled Compression.
>
> PC-DOS 7.00  is too new to worry about.
>
> NOTE: 1.25, 2.11, and 3.31 were only available as MS-DOS, NOT PC-DOS.
>

There was also a DOS 1.05 released between 1.00 and 1.10 that fixed a math
bug in BASIC, if I recall correctly.  It was available from retailers but
it was never sold as a packaged item.

I've got a copy of it, obtained from ComputerLand,  in my DOS 1.0 box. 
I'm pretty sure it boots as DOS 1.0 but contains new BASIC and BASICA
programs.

I found this interesting resource while trying to back up my 1.05 memory:
http://www.geocities.com/HotSprings/Villa/6113/doshist.htm

-- 
Erik Klein
www.vintage-computer.com
www.vintage-computer.com/vcforum
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