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boards:ecb:cvdu:start [2016/07/06 13:45] admin [Introduction] |
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====== ECB Color Video Display Unit ====== | ====== ECB Color Video Display Unit ====== | ||
+ | {{: | ||
+ | {{: | ||
===== Introduction ===== | ===== Introduction ===== | ||
The ECB Color Video Display Unit board provides a color video terminal to RBC ECB bus systems using the MOS8563 chip found in the Commodore 128. Features include: | The ECB Color Video Display Unit board provides a color video terminal to RBC ECB bus systems using the MOS8563 chip found in the Commodore 128. Features include: | ||
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Archived files related to prototypes & Rev 1.00 boards can be found on the [[boards: | Archived files related to prototypes & Rev 1.00 boards can be found on the [[boards: | ||
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===== Build Information ===== | ===== Build Information ===== | ||
==== MOS8563 Documentation ==== | ==== MOS8563 Documentation ==== | ||
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{{: | {{: | ||
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+ | ==== Construction Notes for the Color VDU Rev 1.00 / 2.00 ==== | ||
+ | **Rev 2.00 board builders - Notes 1, 2, 3/9, 4, 7 apply to your boards** | ||
+ | |||
+ | '' | ||
+ | \\ | ||
+ | 2. The DRAM chips are decoupled on the schematic using0.22uf caps, about twice the value for the other decoupling caps. Instead of C11 & C12, which decouple the DRAM chips, the board layout requires that three caps decouple the DRAM chips: | ||
+ | \\ | ||
+ | 3. The resistor network used to convert the output of the 8563 to VGA levels is highly experimental; | ||
+ | \\ | ||
+ | 4. The schematic from which this board was derived did not specify a value for the inductor on the power supply of the 16Mhz oscillator. | ||
+ | \\ | ||
+ | Added 23-Jan-2012: | ||
+ | \\ | ||
+ | 5. For version 1.0 ONLY, there is a clearance issue between the 16Mhz oscillator and the nearby 74LS06 if a full-can oscillator is used. Either switch to a half-can oscillator or bend the pins on the full-can oscillator slightly to avoid shorting pins 14, 13, and 12 of the 74LS06. | ||
+ | between the full-can and those pins. This clearance problem was corrected in version 2.0.\\ | ||
+ | \\ | ||
+ | Added 06-Feb-2012\\ | ||
+ | \\ | ||
+ | 6. For version 1.0 ONLY, circuit mods are requited to operate with both the SBC v2 (Z80) and the SBC-188. | ||
+ | \\ | ||
+ | 7. Test programs are posted for the SBC-188 as of this date.\\ | ||
+ | \\ | ||
+ | Added 20-Feb-2012\\ | ||
+ | \\ | ||
+ | 8. For version 1.0 ONLY, including Dan's comment: | ||
+ | \\ | ||
+ | 9. The resistor net which converts 8563 output to VGA levels uses 820 ohm and 390 ohm resistors. | ||
+ | \\ | ||
+ | 10. Notes 3 & 6 updated.\\ | ||
+ | \\ | ||
+ | Added 14-Dec-2012\\ | ||
+ | \\ | ||
+ | 11. For version 1.0 ONLY, the interrupt signal from the keyboard/ | ||
+ | \\ | ||
+ | --John Coffman\\ | ||
+ | 14-Jan-2012\\ | ||
+ | 23-Jan-2012\\ | ||
+ | 06-Feb-2012\\ | ||
+ | 20-Feb-2012\\ | ||
+ | 14-Dec-2012\\ | ||
+ | \\ | ||
+ | --Wayne Warthen\\ | ||
+ | 07-Apr-2014'' | ||
+ | |||
+ | |||
==== Test Programs ==== | ==== Test Programs ==== | ||
+ | {{: | ||
+ | {{: | ||
===== Builder' | ===== Builder' | ||
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===== Photo Gallery ===== | ===== Photo Gallery ===== | ||
Note: Some photos show prototype/ | Note: Some photos show prototype/ | ||
- | {{gallery> | + | {{gallery> |
===== File List ===== | ===== File List ===== | ||
{{filelist> | {{filelist> | ||