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Datasheets
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Home / Datasheets - Datasheets
Core Components
Components in this table are key components used in the Color Computer and for the most part are family members within Motorola's product line to build 6800/6809/68000 microcomputers.
| Part # | Manufacturer | Description | DataSheet | |
|---|---|---|---|---|
| MC6809E | Motorola | The Central Processing Unit (CPU) used in the Coco 1,2 and 3 | ||
| MC6821/MC6822 | Motorola | Peripheral Interface Adapter. Two are used in the Coco to interface the 6809 to IO functions. | ||
| MC6847 | Motorola | Video Display Generator used to generate text on the Coco 1 and 2 | ||
| MC6883 | Motorola | Synchronous Address Multiplexer (SAM) used on the Coco 1 and 2, Also known as SN74LS783. This chip interfaces the system memory with the CPU and VDG. | ||
| MCM68A364 | Motorola | Basic and Extended BASIC ROM chips. These Read-Only Memories (ROMs) are programmed in the factory with the Basic interpreter developed by Microsoft and Microware. | ||
| GIME | Tandy | Graphics Interrupt Memory Enhancement chip. This custom chip provides most of the "personality" of the Coco 3, including the hi-res graphics modes, ability to access more than 64k and the ability to connect to an RGB monitor. | ||
| WD1793 | Western Digital | Floppy disk controller chip. The main component in the floppy disk controller pak, this chip provides functions to control floppy disk drives. |
Additional Components
The following non-core components were used in the Coco models. They are off-the-shelf parts typically used to provide support and minor logic functions on the board. Many of these components will be familiar to electronics experimenters, and are available from several manufacturers.
| Part # | Manufacturer | Description | DataSheet | |
|---|---|---|---|---|
| MC14050B | Motorola | Latch | link | |
| 74LS273 | Octal Flip-Flop | link | ||
| MC14529B | Motorola | Dual 4-channel data selector. Used to switch joystick and audio inputs. | link | |
| 74LS138 | 1-of-8 Decoder/Demultiplexer. | link | ||
| MC1372 | Motorola | Color video modulator. Used in the RF modulator circuit to connect the Coco to a TV. | link | |
| 723C | Common, off-the shelf 5v voltage regulator. | link | ||
| LM339 | Quad Comparator | link | ||
| 741C | Standard [Op-Amp] chip. | link | ||
| 74LS244 | Octal 3-state buffer/line driver. | link | ||
| 78M12 | Common, off-the-shelf 12v regulator. | link | ||
| 74LS02 | Quad NOR gate | link | ||
| MCM4027AC3 | Motorola | 4k RAM chips. Used in Coco 1 only. | link | |
| MCM90072C | Motorola | 16k RAM chips. | link |
Add-on Components
| Part # | Manufacturer | Description | DataSheet | |
|---|---|---|---|---|
| 6551 | Various | Asynchronus Communications Interface Adapter. Used in expansion paks like the Deluxe RS232 Pak and the Direct Connect Modem Pak | link |