#CBM Announces CDTV!
13-Jun-90 09:27:24
Sb: #108519-#CBM Announces CDTV!
Fm: Kevin Darling 76703,4227
To: John Pendergrass 76246,676
John,
Yah, I don't understand why all home gadgets don't have a standard
controller port (of whatever protocol/type). Worse, when they _do_ have a
port, they rarely are willing to give any info out. Makes me crazy, too
;-).
Side story: the original 3-piece cd-i players (disc, computer, expansion)
connected the drive/computer like this: the computer used a 1200 baud
serial port to tell the drive which track/sector to read. The drive then
shot that info back into the computer over a data line.
So we had a cool idea for development work (where it's important to use
your target player for testing instead of the "real" computer you're
developing with)… we'd make a small controller which took the 1200 baud
request, and which would then read a logical sector from a shared SCSI HD
(1-gigabyte) and shoot it into the cd-i computer via a par/serial data
line… thus allowing realtime emulation of a "homemade" CDROM.
We got into this because most cd-i title places are backed with millions of
dollars, and we figured this would go over big. We even got a preliminary
order for two boards for $40K. (nice market, eh? 😉 Unfortunately everyone
in the biz got the same idea at the same time :-(. So much for that. Our
first and only foray into cd-i land.
I bring this up because someone may want to do a similar gizmo for CDTV.
After all, you'd do development work on a 68030-equipped A2000/3000 (unless
you're a masochist), but would need to do testing on as real a CDTV (A500
plus CDROM drive) environment as possible. Something to think about. – kev