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     1.3 @@ -0,0 +1,33 @@
     1.4 +72pin SIMM DRAM tester
     1.5 +======================
     1.6 +
     1.7 +Firmware for my 72pin SIMM tester written to run on an Atmel atmega644p AVR
     1.8 +microcontroller.
     1.9 +
    1.10 +License
    1.11 +-------
    1.12 +Firmware:
    1.13 +Copyright (C) 2017 John Tsiombikas <nuclear@member.fsf.org>
    1.14 +This program is free software. Feel free to use, modify, and/or redistribute it
    1.15 +under the term of the GNU General Public License v3, or at your option any later
    1.16 +version published by the Free Software Foundation. See LICENSE.firmware for
    1.17 +details.
    1.18 +
    1.19 +Hardware:
    1.20 +Copyright (C) 2017 John Tsiombikas <nuclear@member.fsf.org>
    1.21 +Creative Commons Attribution Share-Alike (CC BY-SA). See LICENSE.hardware for
    1.22 +details.
    1.23 +
    1.24 +Usage
    1.25 +-----
    1.26 +Plug a 72pin SIMM, connect terminal over a serial link (RS232 or USB) and power
    1.27 +up the tester.
    1.28 +
    1.29 +Commands:
    1.30 +
    1.31 +    w <addr> <value> - write byte to address
    1.32 +    r <addr> - read byte from address
    1.33 +    s <addr_bits|ras_lines> <value> - override detected addr_bits/ras_lines
    1.34 +    t <addr> - test address
    1.35 +    d - detect DRAM
    1.36 +    h - help