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DIY Electronics

Southern Cross II

8031 Single Board Computer

Hardware Manual

DIY Electronics (HK) Ltd

PO Box 88458
Sham Shui Po

Hong Kong

Fax: (852) 2725-0610

Voice: (852) 2720-0255

Email: [email protected]

http://kitsrus.com

November, 1998.

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Summary of Contents for Southern Cross II

Page 1: ...cs Southern Cross II 8031 Single Board Computer Hardware Manual DIY Electronics HK Ltd PO Box 88458 Sham Shui Po Hong Kong Fax 852 2725 0610 Voice 852 2720 0255 Email sales kitsrus com http kitsrus co...

Page 2: ...onnect a 9 12 volt DC plug pack via power connector J7 4 Connect the supplied serial cable to connector J5 HOST port Connect a terminal or PC running terminal emulation software to the D25 connector o...

Page 3: ...n only be read not written to The PSEN signal is used as a read strobe for any external program memory Data memory occupies a separate address space from Program memory The RD and WR signals are used...

Page 4: ...ss II has two serial ports 1 Uses the internal serial port of the 8032 52 chip and is referred to as the USER port Connection is via the 10 pin header labelled J6 2 Uses an external SC2691 UART chip f...

Page 5: ...1 are the Rx and Tx lines for the 8031 serial port These 13 I O lines are brought out to a 16 pin header labelled J1 J1 pin Signal J1 pin Signal 1 P1 0 2 P1 1 3 P1 2 4 P1 3 5 P1 4 6 P1 5 7 P1 6 8 P1 7...

Page 6: ...for pin compatible to the CN1 port on the Z80 based Southern Cross computer also available from DIY Electronics It is provided on the Southern Cross II to take advantage of a number of add on boards a...

Page 7: ...I is designed to use a 27256 EPROM for storing BASIC programs These EPROMs require a programming voltage of 12 5 volts Before attempting to save any programs in EPROM the programming voltage must be s...

Page 8: ...can be stored on the same 27256 EPROM it is advisable to use two separate EPROMs If you wish to keep them together then make a copy of the MVS 31 EPROM and use the copy instead The MVS 31 binary file...

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Page 13: ...be supported in the future with new hardware software and documentation Please fill in the form below and return to DIY ELECTRONICS HK LTD PO BOX 88458 SHAM SHUI PO HONG KONG or fax to 852 2725 0610 Y...

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