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Magnum One
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Magnum One (Mid-American Digital) (Disc Manufacturing).iso
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hramdisk.arc
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HRAMDISK.DOC
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1986-03-01
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2KB
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45 lines
HRAMDISK.SYS is a RAM disk that loads into segments D and E,
between the video buffers and the system ROM. It was the basis for
the PC Magazine POWER USER column in the summer of 1985.
If you are using my EZDOS program, HRAMDISK.SYS already has the
DTEST code loaded. This means that you can monitor disk activity
across system warm boots. Also, this means that the contents of
the RAM disk are preserved when the system is rebooted.
HRAMDISK will initialize system memory if you have memory installed
beyond the mother board switch settings. In the CONFIG.SYS file, you
need to add a parameter telling HRAMDISK how much memory to initialize
(the real top of RAM). No reboot will be done, so you need to use my
LRAMDISK program to do that. This will give you two non-volatile RAM
disks for the price of one.
LRAMDISK.SYS will do the system reboot after it installs itself
above the BIOS top of memory pointer. With these RAM disk programs,
plus EZDOS, you have abbreviated commands, disk statistics that continue
across system warm starts, and RAM disks that preserve their contents
across system warm starts.
HRAMDISK is installed with a line in the CONFIG.SYS file that
includes the driver name and the amount of system memory installed below
the display buffer. It should only be used in systems with memory
installed in segments D and E. The result is a 127K RAM disk and the
EZDOS DTEST code.
LRAMDISK is installed with a line in the CONFIG.SYS file that
contains its name, followed by parameters for the disk size, cluster
size, number of directory entries, and amount of system memory below the
display adapters.
My CONFIG.SYS looks like this:
DEVICE=HRAMDISK.SYS 704
DEVICE=LRAMDISK 128 128 32 704
This gives me drive D: in high memory with 127K and drive E: with
128K above the DOS area, which extends to 704K on my system.