Re: Woody on 486 problem
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 02/15/07 21:19, Mike McCarty wrote:
> Ron Johnson wrote:
>> On 02/15/07 20:31, Mike McCarty wrote:
>>
>>> Remember when? I have a machine which I use on a regular
>>> basis which runs MSDOS just fine. I use it on that same
>>> 486 with 16MB of RAM, of which MSDOS actually only uses
>>> 1MB. Who needs to remember when? I can remember now!
>>
>>
>> So, what GUI do you use?
>
> Eh? With MSDOS? No gooey stuff in there!
Well, there was GEM, plus TUIs like DesqView.
But you can't be using it just for MS-DOS; what's the point of
having 16MB RAM if all yo do is run non-extended DOS?
>>> If you want to remember when, I developed serious software
>>> on a machine with 64 KB (yes, KILO bytes) of RAM+ROM total,
>>> and thought I was in heaven to have so much memory. That
>>> was a dual-disc machine: two 8 inch floppies of 512 KB each,
>>> no hard drive.
>>
>>
>> Never used floppy disks, but I had a couple of CP/M KayPros with
>> 380KB minifloppy drives. Damned fine machines those were.
>
> You sure that isn't 360KB? The 5 1/4 floppies used in those days
> were multiples of 90KB. SSSD was 90KB, SSDD was 180KB, and
> DSDD was 360KB.
Nope. That was the IBM PC format.
The same DSDD minifloppy formatted on a KayPro would hold 380KB.
You should remember that all the CPM machines had their own special
formats.
>>> I created a multi-tasking RTOS running 16 apps at the same
>>> time for a security monitoring system on that machine. The
>>> processor was an Intel 8085.
>>
>>
>> How did you keep them from stepping on each other? You wrote the
>> apps in asm?
>
> The whole shebang was assembler. I used MAC, and then RMAC when
> things got too big to make a single assembly file reasonable.
> I used CP/M for development, but when it was all running, of
> course, it was just itself. The apps didn't step on each other,
> because they didn't access memory which didn't belong to them.
How did you prevent it? Good programming?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
iD8DBQFF1ShvS9HxQb37XmcRAopxAKDFDQERshTw87C8f9cwT9IoRn5muwCcDe8L
cMdHcprNxCkuqb9kCwKCscg=
=Z0SL
-----END PGP SIGNATURE-----
Reply to: