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- If you have the older Mitsumi LU002 drive and would like a Dos
- driver for it that is improved in its memory usage and speed, you
- may be interested is this.
- I have found that the Mitsumi V2.10 driver will work very well
- with the older 002 drive with a very minor patch. I will detail
- this patch below:
-
- OFFSET WAS CHANGE TO
- ------ ----- -----
- 0EC9 E8 B0
- 0ECA 73 FF
- 0ECB 30 90
- 3A93 E8 B0
- 3A94 A9 FF
- 3A95 04 90
-
- You can use a debugger or binary file editor (like FED) to make
- this patch to the Mitsumi driver MTMCDE.SYS V2.10. I have found the
- new driver to work perfectly with this patch on my older drive. This
- driver is actually intended for the newer LU005 drive, and Mitsumi says
- that this driver will not work with this drive. I have found that this
- patch will fix this problem and allow its use with same. I am not
- connected with Mitsumi in any way, so don't look to Mitsumi for any
- support for your experiences.
-
- The benefits of the new V2.10 driver over the older V1.50a driver are:
-
- 1) The X switch to allow XMS buffers GREATLY reduces memory demands!
- You can have up to 64 buffers in XMS and only about 20k of conventional
- or upper memory will be used for the driver itself, compared to over
- 80K used with MTMCDD.SYS v1.50a with 32 buffers!!!
-
- 2) Boot up driver load-in time and disc change time are speeded up.
-
- 3) CD benchmarks show a very slight speed gain.
-
- Where do you get the new driver? Good question. Mitsumi does NOT
- have a support BBS, nor is it representing itself on Compuserve to my
- understanding. You may be able to find the new driver on a local BBS
- as it is floating around as a patched "bug fixed" version. It is
- presently on the following BBSs, and probably many others:
-
- Midas Touch IL (312) 764-0761 ;In a door
- (312) 764-0591
- 7 Keys BBS NY (914) 747-2836 ;In the FREE door
-
- Apply this patch ONLY to MTMCDE.SYS V2.10. Then refer to MTMCDE.SYS
- instead of MTMCDD.SYS in your config.sys file.
-
- -John Oliger 5/93
- Compuserve ID# 74670,1675
-