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-
-
- empcd.device 1.1
-
- by Nicola Salmoria MC6489@mclink.it
-
-
-
- This device allows the EMPLANT Mac emulation to use a CD-ROM drive not
- connected to the EMPLANT SCSI port. Only Mac HFS discs are recognized;
- ISO-9660 and audio discs cannot be used.
- The device also provides a double buffered prefetch cache which
- dramatically increases performance when playing QuickTime movies
- directly from a CD-ROM.
-
-
-
- Installation
- ------------
-
- - Copy empcd.device to DEVS:
- - Drag the EMPCD icon into the DEVS:DosDrivers drawer.
- - Now you have to modify EMPCD, selecting the appropriate device and unit.
- Please note that the device name is specified on the Control line, since
- Device is already used by empcd.device. Unfortunately, the Control field
- is not parsed by the Mount command supplied with Workbench 2.x. You have
- to either find a newer version of Mount (v39+) or manually edit
- empcd.device using a hex editor: change "scsi.device" into your device
- name. Of course if your device is really called scsi.device, you don't
- have to change anything. Remember to terminate the name with a 0.
-
- The Buffers field is very important for performance. The default value
- of 25 seems to be the best on my system. Your mileage may vary.
- Don't set it too low, don't set it too high.
-
- If you have a Zorro-2 DMA controller used on a 32-bit addressing machine
- (A3000, A4000, some accelerated A2000 with memory on the CPU card) set
- BufMemType to 513 (which tells the device to use memory in the 24 bit
- addressing range).
-
- - Now reset (or just double click on the EMPCD icon), and load MacII.
- - Click on EMPCD in the left list of the Devices control window, then
- click on the EMPCD which will appear in the right list.
- If you didn't have to set BufMemType to 513, turn off DMA restrictions.
- Turn on Write Protection as well - it won't be noticed otherwise.
-
- Installation should now be complete.
-
-
-
- Usage
- -----
-
- Due to the way Amiga devices are used by the EMPLANT software, you have to
- start the emulation with a disc in the drive, otherwise the Mac will tell
- you that the disk is bad, and ask you to format it - and you will not be
- able to use the CD-ROM afterwards.
-
- To change the disc, drag its icon on the trashcan, change the disc, wait
- for the drive to recognize it, and select "Re-Mount Ejected" in the
- Emplant window.
-
-
-
- Frequently Asked Questions
- --------------------------
-
- Q. Does empcd.device support ISO-9660 or audio discs?
- A. NO.
-
- Q. Will you enhance empcd.device to make it support ISO-9660 and audio discs?
- A. NO.
-
- Q. Can empcd.device be enhanced to make it support ISO-9660 and audio discs?
- A. NO. Hope it's clear now ;-)
-
-
-
- Troubleshooting
- ---------------
-
- Remember that empcd.device is NOT a product of Utilities Unlimited, Inc.
- It is an add-on written by me, Nicola Salmoria, and all comments should be
- sent to me.
-
- Problem: When I boot the Emulation with a CD-ROM in the drive, a requester
- asking me if I want to initialize the disk appears, and the disc icon
- doesn't appear.
- Possible Cause: The CD-ROM is not a Mac HFS disc. Only HFS discs can be used
- with empcd.device.
-
- Problem: When I boot the Emulation with a CD-ROM in the drive, an Amiga
- requester appears, saying that the device couldn't be opened.
- Possible cause: You probably haven't set up correctly the name and unit of
- the device in the EMPCD mountlist. Remember that the name of the device
- controlling the CD-ROM must be put on the "Control" line. Also remember
- that if you are using a Workbench version < 3.0 and the device name is not
- "scsi.device" you must use a hex editor to modify empcd.device directly.
-
- Problem: The CD-ROM icon appears and I am able to open it, but some of my
- discs don't work as expected.
- Possible cause: empcd.device doesn't emulate the SCSI interface. Programs
- sending SCSI commands or relying on other CD-ROM peculiarities will not
- work. If you can, try the disc using the EMPLANT SCSI port. If it works
- that way, it is probably not compatible with empcd.device. If it doesn't
- work even when used via the SCSI port, it could be a problem with your
- system configuration. Try the usual things, like disabling INITs, running
- the emulation in 24-bit mode, and so on.
-
-
-
- History
- -------
-
- 1.1 [empcd.device 38.7 (18.10.94)]
-
- - Fixed a bug which caused some controllers (like the A3000 scsi.device) not
- to work.
- - Now pops up an error requester if the underlying device couldn't be
- opened.
- - Enhanced the documentation
-
-
-
- Legal Issues
- ------------
-
- This software is FreeWare. It is freely distributable as long as the archive
- remains intact, and only a nominal fee is charged for its distribution.
-
- This software is provided "AS IS" without warranty of any kind, either
- expressed or implied. By using it, you agree to accept the entire risk as to
- the quality and performance of the program.
-
-
- EMPLANT is a trademark of Jim Drew & Utilities Unlimited, Inc.
-
- Apple and Macintosh are registered trademarks and QuickTime is a trademark
- of Apple Computer, Inc.
-