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Update README.

Sergio L. Pascual 9 years ago
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README.md

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 socz80-de0_nano
 ===============
 
-This is a port of Will Sowerbutts' socz80 retro microcomputer (http://sowerbutts.com/socz80) for the Tersasic DE0-nano board.
+This is a port of Will Sowerbutts' socz80 retro microcomputer (http://sowerbutts.com/socz80) for Altera FPGA boards, currently supporting DE0-nano, DE2 and DE2-70 from Terasic.
 
 Building
 ========
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 This project only contains the VHDL files for building the core and its depencies. You can find some software for this microcomputer and instructions about what you can do with it inside the tarball of the original project (http://sowerbutts.com/socz80/socz80-2014-04-30.tar.gz).
 
-TODO
-====
-
-* To be able to get this design to run on the DE0-nano without breaking the timing constrains in excess, I had to remove the block RAM based cache. Even without this component, the design barely accomodates to said contrains. A better solution would probably be implementing an arbiter for the SDRAM, allowing this one and its controller to run at 100 Mhz, while the rest of the components run at ~70 Mhz.
- 
-* The original design was developed for a Papilo Pro board, which feautres a reasonable amount of non volatile memory onboard. The DE0-nano only provides a 2KB EEPROM, so I'm thinking about adding an SD card (using its SPI mode) to the design, for storing the ramdisks needed for running CP/M.