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jemmex (Users)

posted by Japheth(R) Homepage, 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!

 

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