-----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----- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]