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 Betreff des Beitrags: Neue Infos zum CDTV-CR
BeitragVerfasst: 08 Okt 2009, 09:44 

Registriert: 07 Aug 2005, 19:05
Beiträge: 2107
Postleitzahl: 29640
Land: Deutschland
Wohnort: Schneverdingen
Hi There,

Jeff Porter was the project manager and Hedley Davis was the lead
design engineer on this project. Scott Schaeffer and I were the
junior engineers on the project. It was early in my career and I
contributed a bit to the motherboard and quite a lot to the Grace
custom chip. Scott also contributed a bit on the motherboard and
quite a lot to the Beauty custom chip.

> Processor: Unknown

Main processor: Motorola 68020. Used to run the Amiga OS and all applications.
System Management Processor: 6510 (6502 with integrated peripherals).
Used to monitor the user interface buttons and drive the front panel

> MMU: Unknown

Built in on Motorola 68020

> FPU: Unknown


> 1 x PCMCIA styled connector.
> Note, this is NOT a true PCMCIA connector, only very early experimental units ever contained a true PCMCIA slot

It was a superset of the PCMCIA connector. It was full compatible
with PCMCIA, but also could be configured to have the Zorro signalling
enabling existing Zorro cards to be repackaged for the CDTV-CR.

>Drive Bays:
> 1 x 3.5"
> 1 x 5.25"

Actually, there were 2 at 3.5". There was as steel bracket onto which
the floppy was mounted on the top. The bottom had a mounting for an
IDE hard drive.

> The CDTV-II, perhaps correctly called the CDTV-CR (CR = Cost Reduced)

We always called it the CDTV-CR. It was demo'd at CES in January
1993. (or was it 1992? It's been a long time!)

> was intended as the successor to the original CDTV. Unfortunately like many of Commodore's
> projects it was never officially released to the public.

In spite of having a successful pre-production run of 64 units, Mehdi
Ali refused to let it go to production as long as there were still
unsold original CDTV's in the warehouse.

> Like the original, the CDTV-II also includes an infra-red remote controller but it also has
> a digital LCD display on the front

The display on the front was a Vacuum Flourescent display, not an LCD

> and a built-in floppy drive which the original doesn't have.

It also had a connector used for connecting a FMV cartridge like the
one that eventually was produced for the CD32 (BTW: That was based on
my proof-of-concept MPEG-4000 demo board for the Zorro-III bus slots.
I didn't do the CD32 FMV design because I was a designer on the CD32
Akiko chip).

One thing it doesn't have that the original CDTV did was a caddy-based
CD system! Drawer-based CD drives were available by then. The
decision was made to use drives without integrated electronics in
order to save cost. The interface was direct to the servos, rather
than to an IDE or SCSI port. That decision carried through to the
CD32 and the CD1200.

> The CDTV-II does not have a keyboard port, or a mouse port like the original model.

Umm... yes it does! The round connector in the lower right corner of
the face of the case behind the flip-down door is a Keyboard port.
It's the same signals as on the standard Amiga keyboard port, plus a
couple of serial lines. The unit was to ship with a normal Amiga
keyboard with the small connector on it. We also had adapter cables
in the lab that could plug into the CDTV-CR and a standard keyboard
cuold plug into it. (I still have a bunch of those!) They worked on
the CD32 as well. We also made a couple of adapter cables that
plugged into the CDTV-CR and had a socket for a standard Amiga
keyboard and a second RS-232 socket connected to the extra serial
signals on the CDATV-CR's port.

Let me know if you have any questions about the CDTV-CR.

I also worked on the Motivator (a scan-converter that allowed the
Amiga to drive monitors in full color with huge resolutions at full
scan-rate, but with slow image updates) with Chris Coley and Joe
Augenbraum. Next I worked on the MPEG-4000 as mentioned above. After
that, I did a lot of the Akiko chip design for CD32. My last project
at C= was project lead on the CD1200 (an Amiga 1200 add-in card with a
68030 socket, a RAM slot, and an Akiko that talked to an external CD
unit extracted from the CD32 design, and a small FPGA chip to control
the whole thing that allowed full CD32 compatibility in an Amiga 1200
platform). Let me know if you have any questions about those projects
as well.

Beth Richard

Teil der Amiga-Community

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