MTHD: Difference between revisions

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A 74573 is used to split the ADDRESS and DATA singnals and a 138 is used for IO mapping
A 74573 is used to split the ADDRESS and DATA singnals and a 138 is used for IO mapping
The 8255 is split into 3 x 8bit ports, one is used for address, CS, RD, WR and RST. The other two port are used for the 16 data bus.


[[Image:Mthdv11.jpg]]
[[Image:Mthdv11.jpg]]


[[Category:Model T Hardware]]
[[Category:Model T Hardware]]

Revision as of 12:44, 23 February 2009

This project it still under development.

The basic idea for this project is to add a harddrive via the System bus on the 100/102/200

The circut is based on a 8255 which controls the harddrive data and control signals.

A 74573 is used to split the ADDRESS and DATA singnals and a 138 is used for IO mapping

The 8255 is split into 3 x 8bit ports, one is used for address, CS, RD, WR and RST. The other two port are used for the 16 data bus.

Mthdv11.jpg