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Description
SIO/2 Board for RC2014 backplane
- 74ALS688 addr comparator for address decoding
- Block of 8 addresses assigned
- Arbitrary 8 address boundry
- SIO at Addr 0 does not conflict with IDE at address 10H (Aka Grant Searle design)
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schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | USB 5V | P4,P5 | HDR-2X1/2.54 | 2 |
| 2 | CHA Clk | P7 | HDR-3X1/2.54 | 1 |
| 3 | CHB Clk | P8 | HDR-3X1/2.54 | 1 |
| 4 | 2.2K | R7,R8 | SIP-6 | 2 |
| 5 | 100nF | C2,C3,C4 | RAD-0.1 | 3 |
| 6 | FTDI Slave | CHA,CHB | FTDI SLAVE SIDE | 2 |
| 7 | Oscillator 14 Pin DIP | U3 | OSCILLATOR_KXO-200 RECT FOOTPRINT | 1 |
| 8 | RC2014 Cheap Backplane | P1 | HDR-2.54-FX-1X36PW | 1 |
| 9 | 74ALS688P | U2 | DIP-20-300-ELL | 1 |
| 10 | 8 SW Dip | SW | VDG/S-08L-H-R | 1 |
| 11 | 10KΩ | R1 | SIP-9 | 1 |
| 12 | 2.2KΩ | R2,R3 | AXIAL-0.4 | 2 |
| 13 | Z80SIO-2 | U1 | DIP-40-600-ELL | 1 |
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