#KDE CARD READER WRITER UTILITY PROGRAM SERIAL#

While the board was being manufactured, I started working on software. The board was then sent off to Advanced Circuits in Colorado to be manufactured. Once I had this, I drew the schematic and layed out the board. My first step in the whole process was designing the PAL equations for the GAL22V10, that would handle memory address decoding for the SRAM and FLASH, the bank switch logic, and the IDE read/write strobes. I layed out a board ( pictures) that implemented the functionality of the Z84C15 in through-hole logic, to make debugging easy (I normally hate doing through-hole, much preferring surface mount). These would all take up unnecessary board space, so I decided to pursue the PIO approach. Typical designs I've seen either use a 8255 or several '373's and '245's to create an interface, and occasionally the '543 (a bidirectional latch arrangement). Using the PIO would be a nice way to interface to the IDE controller, but I hadn't seen such an implementation yet. Since I wanted a small package, the Z84C15 was a natural, as that's got the CPU core, CTC, SIO, PIO, clock generator, etc all on chip.

CP/M is a natural candidate for this, as it's a complete, well documented file system (certainly not without limitations, such as lack of precise file sizes, time stamps, and a limit of 8MB per volume), it's pretty easy to write a BIOS for it, and there's tons of software. It seems a number of people have interfaced IDEs to Z80s and 8051s, but I haven't seen any reports of people getting an OS installed on them. So I finally decided it was time to do something about it. Compact flash cards fit the bill nicely for the mass storage, being faster than MMC cards, having an IDE interface, and being low power.

#KDE CARD READER WRITER UTILITY PROGRAM SERIAL#

The username is 'guest', and the password is blank.ДЄt the moment, this is less a resource page, and more a history of getting my Z80 SBC designed.ДЇor years, I've wanted a little CP/M system, about the size of a pack of cigarettes (1 SOAPOC) that had two or more serial ports, 64K SRAM, a boot monitor, mass storage, and ethernet.

4 - I've committed the entire contents (I hope) of the original project to Subversion, located here.

Kde card reader writer utility program