=============================================
-- CD-WO Publishing for MS-DOS (CDWRITE) --
-- Version 1.0 (May 18, 1992)    --
=============================================


A. System Requirements
======================

	- PC AT/386, 25 MHz; at least 500 KB free RAM
	- MS-DOS 4.01 (or higher)
	- Microsoft CD-ROM Extensions (MSCDEX) 2.20
	- harddisk with average access time below 19 msec
	- Adaptec SCSI board AHA-1540 or -1542
	- Adaptec ASPI DOS Manager
	- Philips CDD-521/00 or CDD-521/10 (incl. cabling)

B. Installation
===============

1. Install the ASPI DOS Manager (ASPI4DOS) with the /NORST 
option set. This includes also jumper settings and the relevant
entries in CONFIG.SYS (See Adaptec installation documentation).
Please ensure, that you have to select
	- DMA Transfer mode
	- INTR enabled
	- AUTO SENSE enabled.

2. - For automatic installation of the CDWRITE software procede as follows:
	> insert the disc containing the INSTALL program in the floppy drive 
	> make this drive the current drive
	> run INSTALL.BAT

   - To install the CDWRITE software by hand procede as follows
     (installation on harddisk C from flexible A assumed):
	> mkdir C:\CDWRITE
	> copy A:\*.* C:\CDWRITE
	> edit the CONFIG.SYS file to include
		device=C:\CDWRITE\CDROM.SYS /D:DDS521
	  Please ensure that this line is *after* the line
	  for ASPI4DOS.SYS !
	> edit AUTOEXEC.BAT to have C:\CDWRITE included in the PATH and
	  add the following line:
		MSCDEX.EXE  /D:DDS521

NOTE:
------
All date/time values (e.g. of files) are converted from loacal time to 
Greenwich Mean Time (GMT) before they are written on the CD. Therefore,
the environment variable 'TZ' should be set to your local time zone 
before using cdwrite.
If 'TZ' is not set, the default time zone value of MSDOS (Pacific time: 
TZ=PST8PDT) is taken.

3. Reboot the system

4. Change to directory C:\CDWRITE and execute utility 'CDPROF.EXE'.
   Repeat this step whenever you vary the hardware environment of your PC.

NOTE:
Please deinstall disk caches and TSRs before you execute the profiler or
the writing process. Disk caches do not increase performance of your disk
system but may decrease it significantly in this special case.


C. Restrictions
===============

The profiler (CDPROF.EXE) currently does not support more than 2 harddisks or
RAM disks -- will be solved soon.

There are some known bugs in the CDD-521, which have implications on 
the usage of the system:

(1) The CDD-521 is no longer addressable after a hardware reset.
Workaround: switch on the PC *first*, switch on the CDD-521 next
(during RAM test, *before* system boot).

(2) In some CDD-521 "real" CD-ROMs are not readable, because of a
firmware bug.
Workaround: not available

(3) The CDD-521 appends two *unreadable* sectors to a track at the end of 
the write process. This causes problems accessing the last logical sectors of 
the CD-WO in UNIX, because of the "read ahead" process. 
Workaround: cdwrite appends 20K to data copied to the CD-WO (0-bytes).

(3) The CDD-521 has to get exclusive usage of the SCSI-bus during writing.

