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- Path: mail2news.demon.co.uk!gate.demon.co.uk
- From: Guy Tanner <bgt@cvget.demon.co.uk>
- Newsgroups: comp.sys.amiga.emulations,comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Emplant. An interesting problem with a CD-Rom Drive.
- Date: Thu, 4 Jan 96 21:41:47 GMT
- Organization: the nearest Pub
- Message-ID: <9601042141.AA007ap@cvget.demon.co.uk>
- Summary: Mac Emplant fails to recognise CD's when A4000 case is on.
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-
- Hi there,
-
- Over the past few days, I've come up against a problem with my emplant that has
- got me near to breaking point.
-
- Between October and the end of December last year, I've been using a quad speed
- SCSI-II CD-Rom drive connected to the Emplant SCSI interface with no problems at
- all.
-
- But since the end of last week, getting a CD-Rom to load is very random.
-
- First, the Mac will claim it needs formating as it is "Not a Mac Disk", by
- ejecting and then reloading, the CD-Rom may either need formating again, or will
- show up on the desktop, but will have corrupted icons, ejecting and then
- reloading, may again bring up the format option, or will work first time. But
- mostly the CD-Rom is assumed to be a none Mac format and I am offered the option
- to format it.
-
- If I get as far is to have all icons up and showing, but I try and copy a group
- of files to the HDrive, at random a file will have a read error. By continuing
- the copy and then manually selecting the corrput file, it will copy with no
- trouble at all.
-
- But here is the real puzzler. If I REMOVE the top casing from my A4000, and then
- run the emplant, I have no trouble at all in loading, copying etc. from the
- CD-Rom drive. If I replace the case while a CD-Rom is loaded and is fully
- readable, it will become unusable, removing the case sometimes returns the
- CD-Rom to a readable status.
-
- My System is as follows, I have not added anything since late November, and the
- CD-Rom drive as worked perfectly with this setup until this week.
-
- A4000 with 2Mb Chip Ram & 1Mb Fast Ram on the motherboard. Kickstart v39.106.
- Motherboard Revision B. Buster Chip v11.
- CyberStorm060/50 with 14Mb Fast Ram installed.
- CyberVision64 with 4Mb Ram.
- Emplant Deluxe. Mac v5.5, System 7.5.1.
-
- The CD-Rom is Vendor : MATSHITA
- Product : CD-ROM CR-504
- Revision : ST23
- Conforms to : SCSI-2
- Block length: 2048
-
- I assume that the problem is connected with either the casing touching
- something, but I've tried to isolate all metal contacts with the case, or it is
- something to do with heat in or around the card. I have the CyberVision64 in the
- bottom Zorro slot, with the Emplant in the top slot, the backing plate for the
- middle Zorro slot has been remove to allow air in. The current room temperature
- is knocking 5 degrees C (The heating broke last night, and the boiler is in
- pieces [I really must get a divorce]) so I think this rules at over heating.
-
- I hope someone out there can help, by the way, I can just about get the
- Diagnostic to state that the Emplant works.
-
- Cheers Guy.
-
-