SCSI identify command
jules.richardson99 at gmail.com
Wed Dec 3 07:47:43 CST 2008
Alexandre Souza wrote:
>> My laserdisc player harks from 1986, incidentally, and even its SCSI
>> data interface has no Inquiry support - it was just too early, I
> SCSI LASERDISC?!?!?!?!?! I think there were only RS-232 Laserdiscs?!
Yep, Philips VP-415, part of the Acorn/BBC Domesday system. It was a modified
version of a different Philips player (VP-412 I believe) that had the addition
of a genlock board and SCSI control logic in a 'slice' beneath the main player.
It retained the RS-232 interface too, but that could only be used for player
control - the SCSI interface let you also pull data from the discs into the
controlling computer. I believe it's the only example of an LVROM drive ever
produced; it was too big and expensive for home use, and within a few years LV
was dying and CD was taking over anyway.
The whole setup's impressive - I've got a nearly-complete copy of the service
manual for the player (along with otherwise-complete docs), and the technology
is pretty advanced for the day. Sadly the players themselves were let down by
poor electronics build quality - the vast majority of them end up being faulty
due to intermittent connections (there's around 20 separate PCBs in the
machine) or bad solder joints.
More information about the cctalk