He used a couple of 74LS393 4-bit binary counters to generate the EPROM address. The author got his inspiration from another device that included similar functionality. Update : Above link deprecated, try the following: I went off to my usual search Website and after some research I found a page that documented a reader of sorts. I asked myself a question? Has anyone done this before? The Arduino in turn would be responsible of interfacing with the EPROM and fetching the required data. A different read command was sent depending on the EPROM size selected by the user. On the PC end it consisted of a Windows application that would send a “read” command to the Arduino. I then put together a block diagram of the reader. Serial communications was easily handled by a slew of languages. I liked this option because it already included the USB interface which could be used as though it were a serial interface. My preferred communications method is serial through USB since no modern computers have a serial port (RS232) anymore.Īn option I considered was using a USB/Serial adapter who would then connect to the necessary electronics that would put the address out on the corresponding lines and would then fetch the data that the EPROM would spit out. The second task was determining how I was going to get the data from the EPROM back to the computer. The first task was determining how I was going to get the address to the EPROM. ![]() This project interested me because of its learning potential. I left that project on the shelf, deciding to first look further into the reader. Other thoughts included an EPROM emulator where some modern storage media could be used to emulate the physical functionality of an EPROM. I wondered what was needed to build just a reader. ![]() ![]() I found that most of the items that I found were readers/burners. I was curious enough about these long forgotten components (so forgotten that when I search for “EPROM” on Google it thinks it is a misspelling and corrects it to “EEPROM”) that I started to look for a reader. I recall having to take numerous factors into consideration so that the code would run correctly. I recall that way back in the 80s I coded a small program that I put on an EPROM and ran when the computer was started. It all started at the beginning of 2015 when an EPROM related topic was discussed in the Color Computer mailing list where I participate.
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