Will this SCSI CD work with an A1200?

[Tahoe]

It should work, what SCSI controller are you using?
Are you sure termination is correct?
I have a Plextor 40tsi and a 121032S burner hooked up and they work fine.

[Tahoe]

The 1230 should work with a SCSI cd-rom drive (even a CDRW) but GVP's are really iffy when it comes to termination.
You have attached the drive with a DB25-50Centronics cable? The other centronics connection on the CDRW does that have a Termination Block? If not that will probably be the problem...

If you don't have a terminator you can try the following:
Open up the drive and take out the drive itself. Look at the back and between the audio connector and the SCSI connector there is a row of jumperpositions. Place a jumper on the second position from the right (termination). The rightmost position is block size (don't mess with that yet), the next one is termination. Hook everything back up and try it now.
If you do use this option remember that from that moment on this device has to be the last in the chain; ie you cannot connect anything on the back port of the drive unless you remove the jumper again!
The manual for the drive is found here:
http://www.yamaha.co.jp/english/product/computer/pdf/4260t_e.pdf

Good Luck!

[Tahoe]

No, gvpscsi.device is in ROM on those cards; otherwise you would not be able to boot from SCSI hard drives.
You can use the updated gvpscsi.device but then you have to disable the ROM version (J6 on the A1230)

Here is the snippet from GVP:
Version 5.3 of GVPSCSI.DEVICE This is version 5.3 of the GVPSCSI.DEVICE driver for the A1200 SCSI-RAM+ and the Performance Series A1230-Turbo+ with A1291 SCSI kit. It makes adjustments for the NEC CDR-38 and NEC CDR-25 CD-ROM drives. You will need to change a jumper on the board (J4 for A1208 and J6 for A1230) for this to work. With the SCSI portion of the ROM disabled, you will not be able to boot off a SCSI drive, but this version is not needed unless you have one of these CD_ROMS. Included is a corresponding version of GVPSCSICTRL.