SC143 is a low profile ROM module designed for the RC2014 bus.
This module includes a 128k byte FLASH memory chip which is divided into four 32k byte banks. The required bank is selected with jumpers JP1 and JP2.
The module will typically be used with jumper shunts fitted in the positions shown below.
JP1 and JP2 together select which of the four banks are used, as indicated in the table below.
| Bank Number | JP2 (A16) | JP1 (A15) | Typical Contents | |
| 0 | 0 | 0 | SCM S3 v1.0 | |
| 1 | 0 | 1 | Blank | |
| 2 | 1 | 0 | Blank | |
| 3 | 1 | 1 | Blank |
JP3 allows the enabling and disabling of writing to the FLASH memory chip. In normal use it is recommended that the jumper shunt is fitted to protect the FLASH chip from being written, as illustrated above.
In theory, the FLASH chips can be written to with suitable software.
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