SC728 is a module riser designed for the RCBus.
- SC728 – Assembly guide
- SC728 – Compatibility
- SC728 – Parts list
- SC728 – Printed circuit board
- SC728 – User guide
- SC700 series information
- SC700 series support
Downloads
- SC728, v1.0, Kit contents sheet (PDF)
- SC728, v1.0, Schematic (PDF)
- SC728, v1.0, PCB design files (OSHWLab)
- SC728, v1.0, Gerber files (ZIP)
Errata
- Nothing known
Suppliers
| Kits | Website | From | Currency |
| Small Computers Direct | SCDirect | UK | GBP |
| Stephen C Cousins | Tindie | UK | USD |
| Small Computer Central | Lectronz | UK | Euro/USD |
| PCBs | Website | From | Currency |
| Small Computers Direct | SCDirect | UK | GBP |
| Stephen C Cousins | Tindie | UK | USD |
| Small Computer Central | Lectronz | UK | Euro/USD |
| Assembled and Tested | Website | From | Currency |
| Not available | |||
| Components | |||
| See parts list |
Tindie does not collect VAT for EU countries
Lectronz does collect EU VAT for orders up to 150 EUR
Parts List
| Reference | Qty | Component |
| PCB | 1 | SC728, v1.0, PCB |
| P1 | 1 | Header, male, 2 row x 40 pin, angled |
| S1 | 1 | Header, female, 2 row x 40 pin, angled |
| Screw (for spacer) | 1 | Machine screw, 6mm, M3 |
| Spacer | 1 | Spacer, 10mm, M3, nylon |
Printed Circuit Board
User Guide
SC728 is a simple module riser with one to one connections for all 80 pins. There really isn’t much more to say!
Input/output port functions
| RCBus I/O Address | Read | Write |
| None | n/a | n/a |
Jumper options
| Jumper | Function |
| None | n/a |
Connectors
| Connector | Function |
| P1 | RCBus connector (male/pins) |
| S1 | RCBus connector (female/socket) |
Assembly Guide
Below is the suggested order of assembly. A general guide to assembling circuit boards can be found here.
- Bus header P1
Make sure the pins are parallel to the PCB so that the board is vertical when it is fitted into a backplane socket - Bus socket S1
- Fit the nylon spacer in the mounting hole
Compatibility
This module conforms fully to the RCBus specification v1.0 and thus supports: RCBus-2014, RCBus-Z80, RCBus-68xx, RCBus-9995.
The RCBus specification includes RCBus-2014 (both RC2014 standard 40-pin bus and RC2014 enhanced 60-pin bus) and also the full 80-pin RCBus. The 80-pin RCBus provides support for advanced Z80 features, such as the interrupt daisy-chain, as well as support for other processor families.
The table below indicates electrical compatibility with each backplane type (40, 60 and 80 pin)
| Backplane | ? | Compatibility notes |
| RCBus 80-pin |  | Fully supported |
| RCBus 60-pin (RC2014 enhanced) | | Limitations: Only 60-pin bus signals available |
| RCBus 40-pin (RC2014 standard) | | Limitations: Only 40-pin bus signals available |
Notes
- This product is designed for hobby use and is not suitable for industrial, commercial, or safety-critical applications.
- The product contains small parts and is not suitable for young children.
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