MTHD: Difference between revisions
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This project it still under development. | This project it still under development. | ||
The basic idea for this project is to add a | The basic idea for this project is to add a hard drive via the [[System bus]] on the 100/102/200 | ||
The | The circuit is based on a 8255 which controls the hard drive data and control signals. | ||
A 74573 is used to split the ADDRESS and DATA | A 74573 is used to split the ADDRESS and DATA signals 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. | 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. | ||
Latest revision as of 16:56, 17 December 2009
This project it still under development.
The basic idea for this project is to add a hard drive via the System bus on the 100/102/200
The circuit is based on a 8255 which controls the hard drive data and control signals.
A 74573 is used to split the ADDRESS and DATA signals 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.
