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General| Brand | DIY |
|---|---|
| Model | Southern Cross II |
| Category | Motherboard |
| Language | English |
Steps to configure and run the board in 8031 mode using the MVS-31 monitor.
Steps to configure and run the board in BASIC mode using an 8052-BASIC chip.
Details on compatible EPROM types (8K, 16K, 32K) and selection via jumper JP2.
Explanation of the 8051 microcontroller memory architecture and its implementation on the board.
Description of the RS-232 serial ports, their connections (J5, J6), and pin assignments.
Details on the 13 available I/O lines from the 8031 microcontroller brought out to header J1.
Description of the 24 I/O lines from the 8255 PPI chip connected to header J2.
Details on the dynamic 'bit ports' (4 ports) mapped in external data memory, brought out to J4.
Information about the 256 bytes of I/O expansion available via connector J3.
Procedure for setting up and programming EPROMs using the Southern Cross II board.
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