DOS ain't dead

jemmex (Users)

posted by Japheth , Germany (South), 24.08.2019, 12:45

> Memory Map: (R=system ram, G=graphics, E=rom/rsvd, P=page frame, U=umb)
> 00000: RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR
> 40000: RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR
> 80000: RRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRR GGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGG
> c0000: EEEEEEEEEEEEEEUU PPPPPPPPPPPPPPPP EEEEEEEEEEEEEEEE EEEEEEEEEEEEEEEE

As you can see, jemmex provides one UMB at CE00-CFFF, size 8 kB.

Might be increased by:

1. add option NOEMS; this will add 64 kB
2. add option I=B000-B7FF; this will add 32 kB

> Conventional 639K 151K 488K
> Upper 0K 0K 0K
> Reserved 385K 385K 0K

> how reach upper memory???

Usually line DOS=HIGH,UMB will ensure that DOS is using the UMBs provided by jemmex. However, this requires that jemmex is loaded via DEVICE=jemmex.exe in config.sys.

---
MS-DOS forever!

Complete thread:

• jemmex - david, 22.08.2019, 11:54 (Users)
  • jemmex - Japheth, 23.08.2019, 09:04
    • jemmex - david, 24.08.2019, 10:46
      • jemmex - Japheth, 24.08.2019, 12:45
        • jemmex - david, 24.08.2019, 14:11
          • jemmex - Japheth, 24.08.2019, 17:36
            • jemmex - david, 27.08.2019, 13:10
              • jemmex - Japheth, 31.08.2019, 10:04
                • jemmex - david, 03.09.2019, 09:40
                  • jemmex - david, 26.09.2019, 10:08
      • jemmex - Rugxulo, 30.08.2019, 02:49
  • jemmex - boeckmann, 15.12.2023, 00:32