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 11:44, 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.
