(*
** SYSID.PAS
**
** Version 5.1 (mods by Andrew Rossmann 5/28/90)
**
** Usage: [d:][path]SYSID
**
** A system description for DOS-based PC/XT/AT- and PS/2-class machines.
** SYSID generates 16 screens of information about the host system and
** runs under DOS versions 3.0 and later.
**
** My primary sources of ideas in SYSID were Ray Duncans "Advanced MS-DOS"
** and Terry Dettman's "DOS Programmer's Reference." The ideas of Prakash
** Chandra,Terje Mathisen,Bob Smith, and others appear in various places.
**
** Some of the techniques SYSID uses are not documented or officially
** supported by either IBM or Microsoft. Where possible I have followed
** the undocumented routine with a comment describing my source for the
** technique.
**
** SYSID was developed on an IBM PC with Turbo Pascal 5.0, Turbo Assembler
** 1.0, and DOS 3.30. The source code has been split into two files:
**
!! SYSID.PAS - the source code
** SYSID.ASM - assembly language procedures
**
** Known bugs:
** 1) Page 2: The CPU test for interrupts of multi-prefix string
** instructions is reliable only on machines whose clock speeds are
** less than about 15 MHz. The 8086 and 8088 are the only CPU's that
** don't handle such interrupts correctly, however, and they aren't
** (to my knowledge) ever run at anything like 15 MHz. (This 15 MHz
** limit assumes that the timer tick interrupt occurs at the standard
** rate of 18.2 Hz. SYSID could check that, too, I suppose.)
** 2) Page 5: The description of foreground color will not mention the
** blinking attribute, even if it was enabled before you invoked
** SYSID.
** 3) Page 10: SYSID used to report incorrectly the statuses of some of
** the executable files which use the "multiplex interrupt" (INT
** 2FH). I have commented these status checks out of the source
** code, determined to do battle with them another day. Can anyone
** supply the correct INT 2FH functions for these files? Or are some
** of them red herrings that simply check INT 2FH to see if *other*
** files have been loaded (e.g. APPEND/ASSIGN)?
** 4) The error beep sometimes fails to sound when you press PgDn
** while on the last page (or PgUp while on the first page). I have no
** idea why. (!corrected in version 4.5)
**
** Both the source and object code of SYSID are hereby released into the
** public domain. Neither version carries any warranty, expressed or
** implied, of merchantability or fitness for a particular purpose.
**
** Comments, suggestions, and questions may be addressed to:
** BIXMail: sjgrant
** CompuServe: 71101,706
**
** Steve Grant
** Long Beach, CA
** January 13, 1989
!! Changes by Andrew Rossmann (5/28/90) v 5.1
!! Page 2: Corrected bug in 386 detection code actually in SYSID.ASM.
!! This bug could cause lock-ups or exception errors on
!! 386, 386SX, or 486 systems.
!!
!! Changes by Andrew Rossmann (1/19/90) v 5.0
!! Page 9: Added buffer count (and read-ahead) for DOS 4!
!! Page 15: Added several more partition types.
!!
!!
!! Changes by Andrew Rossmann (12/31/89) v 4.8
!! Page 2: Added recognition (I hope) of the '486. This involved
!! replacing the code that detects the 286/386 with newer
!! code by Robert Collins.
!! Page 5: Added the extended modes of the Paradise VGA boards.
!! (Considering that the CRT unit forces the screen into a
!! standard text mode at startup, most of the entries are
!! sort of useless right now.)
!! Page 15:Added Disk Manager, Speedstore, Split (?), and GB (?) to
!! the recognized partition types.
!! Corrected some erroneous numbers in the starting cylinder
!! and sector.
!!
!!
!! Changes by Andrew Rossmann (9/30/89) v 4.7
!! All: Re-compiled under Turbo Pascal 5.5.
!! Page 9: Reduced the number of files to 255 due to a potential bug
!! under DOS 3.30.
!! Page 10:Added a few extra programs to the multiplex listings. Some of
!! these will probably only be recognized under DOS 4 or newer.
!!
!!
!! Changes by Andrew Rossmann (7/2/89) v 4.6
!! Page 9: Under DOS 3.30 or newer, use a new DOS function call to set
!! up space for up to 256 files. The number of total files
!! available will now be closer to the FILES= setting, instead
!! of being stuck at the 20 that is the default size.
!!
!! Changes by Andrew Rossmann (6/7/89)
!! Changed the version to 4.5.
!! ALL: Pressing will bring up a 'Page no.=>' prompt. You
!! can then type in the number of the page you want to jump to.
!! Page 9: Added OEM (Original Equipment Manufacturer) Serial number to
!! list. Not everyone uses this. Put file handle table sizes
!! on one line.
!! Changed current time to conform to the format of the current
!! country code, including 12-hour format.
!! Page16: Corrected more DOS4 errors in the Dos Disk Parameter Block
!! listings. It seems the number of sectors per FAT has grown
!! from 1 byte to 1 word. This pushed the sector # of directory,
!! address of device header, media descriptor, access check,
!! and next block pointer up 1 byte.
!!
!! Changes by Andrew Rossmann (6/3/89):
!! I upped the letter to 'V'.
!! Page 9: Added 'Boot disk was'. This will display which disk drive
!! was used to boot the computer under DOS 4. Under DOS 3,
!! this will always display (unknown).
!! I changed the file used to figure out the number of available
!! file handles from COMMAND.COM to the program itself. This is
!! because COMMAND.COM may not always be available (especially
!! if you are on floppies.) It's more likely the program itself
!! will be available. This uses a DOS 3 or 4 feature that lets
!! a program know it's full pathname. (ParamStr(0) in TP5).
!! Page10: Added extra information about the APPEND command under DOS
!! 4. Will display which switches are active, and the path
!! currently in use.
!! Page15: Added several parition types, including 'Big DOS-16' (DOS 4
!! partitions >32M), XENIX, NOVELL, PCIX, CP/M, and BBT.
!! Page16: Modified the DISKREAD portion of SYSID.ASM for use under
!! DOS 4. Will now correctly read disks with partitions >32M.
!! Disks >32M under Compaq DOS 3.31 will probably not work.
!!
!! Changes by Andrew Rossmann (5/29/89):
!! I named this version 4.44U for 'U'pdated. Don't know of any
!! newer versions.
!! Page 1: The search for the Copyright message in ROM has been
!! expanded to start at F000:C000 instead of F000:E000. This
!! test had returned nothing on my Tandy 1000SX. This may
!! cause longer waits on other machines. NOTE: the CPUID
!! routine does not detect my V20. It returns an unknown type.
!! I have no idea why, and I would like to know why. (I also
!! have an 8087 if that makes any difference.)
!! Page 7: If you had a mouse, some information about your keyboard
!! ended up scrolling off the screen. Some related info
!! has been put on 1 line to prevent scrolling.
!! Page 9: The method to find the number of available file handles
!! had a minor problem. It used the COMSPEC environment
!! variable to continuously open COMMAND.COM until an error
!! occurred, presumably a 'Too Many open files' error. BUT,
!! the files were opened as untyped files, which have a
!! default FileMode = 2 (read/write). If your copy of
!! COMMAND.COM was read-only (for virus protection), an
!! error 5 (Access denied) occured, and 0 available handles
!! was shown. This is fixed by setting FileMode:=0 (Read only)
!! before opening files.
!! The printer echo status is supported under DOS 4.
!! The number of buffers is still unknown as I am unable to
!! figure it out. Since DOS 4 can have a huge number of
!! buffers, and even put them in EMS memory, finding out their
!! count may be difficult.
!! Page13: Information about a floppy now supports the parameters
!! for 3.5" drives, and displays number of tracks.
!! Page16: Now supports DOS 4.0 and Compaq DOS 3.31 with partitions
!! >32M (maybe others if they follow the same format.)
!! If you have a disk formatted under DOS 4, the boot
!! record section will display the volume label, serial number,
!! and FAT type of the disk.
!!
!! My computer is a Tandy 1000SX running MS-DOS 4.01 and a Paradise VGA+.
!! Compiled under Turbo Pascal 5.5 and Turbo Assembler 1.01.
!! Much of the additional info came from Ray Duncan's "Advanced MSDOS
!! Programming" second edition (a must get book for anyone interested
!! in low-level stuff.) Also, additional information on the DOS 4 boot
!! sector format came from "The Norton Troubleshooter." A book that
!! comes with The Norton Utilities 4.5.
!!
!! Andrew Rossmann
!! Wheeling, IL
!!
!!
!! Defender BBS, 1-708-390-6594
!! Igloo BBS, 1-708-272-5912 or 1-708-272-5917 (PEP)
!! DDSW1 BBS, 1-708-566-8911 (HST) or 1-708-566-8912 or
!! 1-708-566-8909 (PEP)
!!
!! Unix Mail:
!! [email protected]
!! -or-
!! [email protected], or !ddsw1!andyross
*)