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---- Amiga CDTV ----
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In 1991 March Commodore released its first CD console, the CDTV (Commodore Dynamic Total Vision). This console was designed around A500+ and some components of the A2091 SCSI controller and came in standard 43 cm HiFi format. The CDTV has anticipated many modern design concepts like the integrated CD-ROM drive.

* Processor *

68000 @ 7-28 MHz
68020 @ 14-33 MHz
68030 @ 16-50 MHz

All CDTVs have a socketed 68000 @ 7.14 MHz on their motherboard. Upgrading the processor requires the use of an accelerator board attached to the 68000 socket - many of those A500 internal accelerators fit inside the CDTV.

* Memory *

up to 2 MB Chip RAM
up to 32 MB Fast RAM on processor boards
up to 8 MB Fast RAM on expansion cards attaching to the diagnostic port
up to 256 kB on proprietary memory cards

The CDTV has 8 ZIP sockets on its motherboard, which take 256k4 ZIPs giving 1 MB Chip RAM in total. The Chip RAM can be expanded to 2 MB.
Internal expansion cards, which connect to the diagnostic connector, allow the addition of up to 8 MB 16 bit Fast RAM. Processor cards featuring a 68020 or better add up to 32 MB 32 bit Fast RAM. The special CDTV memory cards can be used as RAM expansion increasing the RAM amount by 64 or 256 kB.

* Custom chips *

Fat Agnus - ECS display controller
Super Denise - ECS graphics coprocessor
Paula - audio and I/O controller
Gary - system address decoder
DMAC - DMA controller
Kickstart ROMs
EPROMs containing CDTV specific code

The CDTV's ECS chip set supports the following screen modes:
Low High Super
PAL, non-interlaced
PAL, interlaced
NTSC, non-interlaced
NTSC, interlaced
50 Hz, 15.75 kHz
50 Hz, 15.75 kHz
60 Hz, 15.75 kHz
60 Hz, 15.75 kHz
640480 - 640960
400300 - 800600
50 Hz, 31.5 kHz
72 Hz, 24 kHz
Low resolution screen modes offer up to 32 colours from a palette of 4096, 64 in EHB mode or 4096 in HAM mode. High resolution screen modes offer 16 colours from 4096, super-high resolution and productivity modes offer 4 colours from a palette of 64.
4 channel stereo 8 bit audio output with frequencies up to 28 kHz when using screen modes with 15 kHz, or up to 56 kHz when using screen modes with higher horizontal frequency.
All CDTVs shipped with Kickstart 1.3 ROMs. Upgrading to Kickstart versions above 1.3 is only possible with special hardware released by third party manufacturers.

* Expansion slots *

1 diagnostic slot
1 DMA expansion slot
1 proprietary memory card slot
1 video slot

The 80 pin diagnostic slot offers nearly the same signals as the A500's side expansion connector, it is meant for any type of expansion device.
The 30 pin expansion slot can be used for DMA expansions, e.g. SCSI controllers.
The proprietary memory card slot (40 pins) takes memory cards of 64 kB or 256 kB size. These cards can be used as RAM expansion or flash memory; the content is battery backed up.
The 30 pin Video Slot is occupied by the video module, but this unit can be replaced by other expansion devices.

* CD-ROM drive *

The CDTV features a single speed (153 kB/sec) caddy loading CD-ROM drive. The supported CD formats are ISO-9660 CD-ROM, Audio CD, CD+G and CD+MIDI.
CD+G is a special Audio CD containig low resolution still images. CD+MIDI has MIDI tracks encoded along with the CD audio portion, allowing to play along with a synthesizer attached to the CDTV MIDI ports.

* Interfaces *

1 serial DB25 male, RS232
1 parallel DB25 female, Centronics
1 video DB23 male, analog RGB
2 mouse/game, 5 pin DIN female
2 stereo audio, RCA jack
1 external floppy DB23 female
1 keyboard, 6 pin female mini-DIN
1 MIDI In, 5 pin DIN female
1 MIDI Out, 5 pin DIN female
1 IR port
1 6.3 mm stereo headphones jack
1 40 pin CD-ROM header
UK version
1 composite video, RCA jack
USA / Canadian version
1 RF In
1 RF Out
1 composite video, RCA jack
European version
1 Scart

All the video connectors (except the RGB port) belong to a removable video module, thus enabling different configurations for different countries. The module is much the same like an internal A520.
The floppy drive controller supports up to four devices, all connected externally.
The CD-ROM interface is a crippled SCSI-I connector and needs a special CD-ROM drive connected to it.
The MIDI ports are a part of the standard serial port circuitry. The CDTV can use either a serial device or a MIDI device, but not both at the same time.

* Other components *

Battery backed up clock - front panel time display
Keys on the front panel to control the CD player
Power and CD drive LEDs
Infrared remote controller