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- CDRAM version 0.6
- Diapason, March 1995
-
-
-
- This archive should carry the following files:
-
- CDRAM.COM TSR: 3228 bytes
- CDRAM.DOC This file: 8279 bytes
- FILE_ID.DIZ
-
-
- REQUIRED: - 386 or better CPU
- - MSCDEX version 2.1 or better
-
-
- INTRODUCTION
-
- CDRAM is a resident cdplayer with common fonctions like play/pause,
- next, previous. Its particularity is that it's not memory hungry:
- CDRAM only uses 1488 bytes of RAM. CDRAM is Freeware. As a reward,
- you can send me your comments or eventually a bug report.
-
-
- USAGE
-
- CDRAM [/? /i /r]
-
- /? Show intructions
- /i Show usefull information given by MSCDEX
- And all the CD tracks (if one is present in the drive)
- /r Remove CDRAM from memory
-
- Commands:
-
- ALT-1: Previous
- ALT-2: Rewind
- ALT-3: Play/pause
- ALT-4: Fast Forward
- ALT-5: Next/Jump*
-
- * Short note on Jump:
-
- Suppose that track 1 is actually playing and you want to listen to
- track 8. All you have to do is to type '8' on the keyboard then
- ALT-5 (Important: a CD MUST be playing). CDRAM calculates the track
- number according to the last key typed on the keyboard. So, this
- means that this command is limited to tracks 1-9; but there is a
- simple way to reach tracks beyond 9. For more informations, please
- report to the NOTES section below.
-
-
- NOTES
-
- - CDRAM also plays data CDROM with one or more audio tracks; it will
- automatically jumps the first one.
-
- - If you change the compact disk, you have to press play 2 times
- (sometimes).
-
- - Hotkeys are actually working only in programs who are waiting
- for a keypress (like DOS, Telemate or WP).
-
- - You can load CDRAM high easily.
-
- * Fast Forward and Rewind do 10 seconds jumps.
-
- * This version includes a new method for memory installation and
- uses vector 81h for the install-check. This could cause problems
- if other programs use or kill the vector. If this ever happen,
- CDRAM may refuse to run, to install or to uninstall itself.
- Please contact me and I will add a parameter so you can change
- (or ignore) the vector number to your needs.
-
- * If CDRAM tells you that it can't be removed from memory without
- compromising another TSR, it means that this TSR uses the same
- vector as CDRAM does (16h) and it was loaded after CDRAM. The best
- way to handle this is to put CDRAM at the end of your AUTOEXEC.BAT
- file, otherwise CDRAM will be deactivated and won't respond to
- ALT-x requests anymore. To reactivate, type CDRAM again.
-
- * Second note on the Jump instruction. When you press ALT-5
- (Next track), I check the last key pressed instead of executing
- its normal fonction. Then I convert it in Hex format by
- substracting 48 (char 0 in ASCII). If the result corresponds to a
- track of the disk in the drive, CDRAM jumps to this track. So, to
- go directly to track 17, you can type 'A' (65 - 48 = 17). Pretty
- simple eh? All you have to do is to learn the ASCII table! I will
- give you the codes for tracks 10 to 20:
-
- Track ASCII Code Corresponding ASCII character
-
- 10 58 :
- 11 59 ;
- 12 60 <
- 13 61 =
- 14 62 >
- 15 63 ?
- 16 64 @
- 17 65 A
- 18 66 B
- 19 67 C
- 20 68 D
- etc...
-
-
- NOTES OF THE AUTHOR
-
- This software brings nothing new. I firstly did CDRAM for my own use.
- My problem was the following: I needed a TSR player, especially usefull with
- those never-ending downloads; you don't really have access to your hard disk
- meanwhile. I searched through several BBS and on Internet, but all I found
- was dissapointing. All the TSR were taking above 10k of RAM and I didn't
- need very sophisticated fonctions.
-
- With The PC Bible in one hand and a MSCDEX document I found on
- Internet in the other, I started coding. This was not very simple because
- all the code is written in Assembly language, the Microsoft document is pure
- crap and you can't tell the CDROM drive to "play tracks 1 to N". In fact,
- you have to handle 32 bits Red book and HSG addressing ( this is the way to
- count the sectors on a CD ) and this is why I've decided to use the extended
- 32 bits registers of the 386 processor ( am I lazy or what! ). Everybody got
- one, right?
-
- Oh, before I forget, maybe you realized that english is not my native
- language. I tried to translate the french document the best way I could.
- I'm sorry if I made mistakes, and if so don't be shy to tell me!
-
-
- IN THE FUTURE: - Better keyboard handling
- - VGA animation on start-up
- - RANDOM fonction (probably memory hungry)
- - Auto-bug-detection (?!?!?)
-
- TO CONTACT ME:
-
- Christian Michaud
- 853 John-West
- Ste-Foy, Québec
- CANADA
- G1V 3C9
-
- Tel: 1-418-657-2135
- Internet: michaudc@ift.ulaval.ca
- BBS: Nouvelle Frontière (418-658-6769)
-
-
- TESTED ON:
-
- 486DX-33, Sony CDU31A drive, Mscdex 2.23
- 486DX2-66, double speed Panasonic drive, Mscdex 2.22
- Pentium 90, Panasonic drive, Mscdex 2.23
- 386DX-33, Mitsumi drive, Mscdex 2.23
- 486DX-50 EISA, external Sony SCSI drive, Mscdex 2.20
- 386DX-33, Panasonic drive, Mscdex 2.23
-
-
- HISTORY
-
- Version Comments
- ------- --------
-
- - 0.6 * You now have to type CDRAM /r to remove CDRAM from
- March 95 memory.
- * You can display tracks with cdram /i.
- - A big part of the code has been re-written to remove
- some bugs. For example, one stupid bug that uses
- to hang your computer (sometimes) when parameters were
- found on the command line...
- - You will now have 48 bytes more free memory!
- Yep, CDRAM drops to 1488 bytes.
-
- - 0.5 * At last, parameters on command line: no more useless text
- Feb. 95 on the screen
- * Hotkeys have slightly changed places to let space for Fast
- Forward and Rewind
- * First english version
- - Better merory management (I think!)
- - CDRAM should now refuse to run on 8088 and 286 computers
- instead of stupidly hanging the machine like in previous
- versions. The problem is that I don't know if it works!
- Maybe you can try that for me if you can get that old XT
- out of the attic? Please send me a message!
- - CDRAM now takes 1536 bytes of memory.
-
- - 0.4 - No more infinate loop if your drive supports interlacing
- Jan. 95 - Minor bug in Jump command corrected
-
- - 0.3b - First "secure" version. In fact, I did not receive a lot
- Dec. 94 of echos from those who tried it, so I suppose nothing went
- wrong. Well, I hope so!
- * Jump instruction added -> CDRAM now takes 1344 bytes
-
- - Beta - Computer don't hang anymore if MSCDEX is not detected.
- Dec. 94 * Stop is replaced by Pause.
- - Elimination of redundant code, back down to 1312 bytes.
-
- - Alpha First version. Uploaded on some BBS. Only one people seems
- Nov. 94 interested. Uses 1440 of RAM.
-
-