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-
- SHSUCDX Version 2.1
- Jason Hood, August 2003
- jadoxa@yahoo.com.au
-
-
- This is an update to SHSUCDX version 1.4b by John McCoy. See README.CDX
- for usage details. This document only contains the changes. The full
- SHSUCD package also contains client/server and cache programs. This
- package is just the redirector component (MSCDEX replacement).
-
- Note: a 386 is required. It also loads itself high (by default).
-
- The primary reason for this update is to support long ISO entries. The
- previous version would simply take the first eleven characters. This
- version will take the first eight characters, or up to the dot, skip to
- the dot, then take the next three. It also has an option to generate
- "tilded" entries, which will overcome same-name limitations. The tilde
- generation is similar, but not identical, to how Windows generates its
- short name entries for the long names. The tilde usage is controlled by
- the new option /~:
-
- SHSUCDX /d... /~
-
- will generate tilded entries instead of truncating. This option is also
- available after installation:
-
- SHSUCDX /~[+|-]
-
- "+" will turn tildes on, "-" off; anything else will toggle. The Get
- Directory Entry function has been extended to control tilde usage:
-
- Int 2F
- AX = 150F
- CL = -1
- CH = 0: Get current tilde state in AX (0 off, -1 on)
- CH = 1: Set current tilde state from BX (as above; assumed valid).
-
- Carry will be cleared (MSCDEX will set carry).
-
- After changing the tilde state it might be necessary to change the path,
- to reflect the new name(s).
-
-
- A new program has been added to patch SMARTDrive 5.02 to allow it to
- cache SHSUCDX. Simply run SMARTER.EXE [d:\path\smartdrv.exe] to generate
- SMARTCDX.EXE in the current directory. If the path to SMARTDRV.EXE is
- not given, SMARTER will try and locate it using the "winbootdir"
- environment variable, or C:\WINDOWS. Note that SMARTCDX will not cache
- MSCDEX should you wish to return to it. Another function has been added
- to supplement the patch:
-
- Int 2F
- AX = 1100
- BX = EBAB
- Return:
- BX = BABE
- ES:DI -> drive table
- CX = number of drives
-
- This might be useful should you wish to know the resident segment.
-
-
- Following are the other changes:
-
- It's a lot smaller - only 6.5K for one drive.
-
- The error codes have been corrected (they were the right number, but
- in the wrong base).
-
- Finding the volume label will preserve the path and pattern (not
- implicitly set "\*.*").
-
- Return the hidden attribute (it was only being set in searches).
-
- Redirector (Int 2F AH = 11):
-
- All functions will set carry on drive not ready.
-
- Open (16) and Extended Open (2E) will fail on write; Extended Open
- also fails on replace.
-
- MSCDEX (Int 2F AH = 15):
-
- Get Copyright (02), Abstract (03) and Bibliographic (04) file names
- will return only what is necessary (ie. up to the first space).
- Previously the whole 37 bytes were returned.
-
- Read VTOC (05) will read all (up to 240, anyway).
-
- Absolute Read (08) will return 0 if successful (not 1).
-
- Get (MSCDEX) Version will return version 2.22.
-
- CDROM Check (0B) clears carry.
-
- Get Directory Entry (0F) will copy the length and fail the canonical
- request.
-
- Version 2.1:
-
- Help screen via "/?".
-
- "/C" will prevent automatically loading into high memory. High
- memory problems with some systems have also been fixed.
-
- Prefixing the driver name with '?' (ie: "/D:?driver") will silently
- ignore the driver if it could not be found.
-
- Fixed problem in determining the drive letter to use.
-
-
- Jason Hood, 4 August, 2003.
-