1 72pin SIMM DRAM tester

2 ======================

3

4 Firmware for my 72pin SIMM tester written to run on an Atmel atmega644p AVR

5 microcontroller.

6

7 License

8 -------

9 Firmware:

10 Copyright (C) 2017 John Tsiombikas <nuclear@member.fsf.org>

11 This program is free software. Feel free to use, modify, and/or redistribute it

12 under the term of the GNU General Public License v3, or at your option any later

13 version published by the Free Software Foundation. See LICENSE.firmware for

14 details.

15

16 Hardware:

17 Copyright (C) 2017 John Tsiombikas <nuclear@member.fsf.org>

18 Creative Commons Attribution Share-Alike (CC BY-SA). See LICENSE.hardware for

19 details.

20

21 Usage

22 -----

23 Plug a 72pin SIMM, connect terminal over a serial link (RS232 or USB) and power

24 up the tester.

25

26 Commands:

27

28 w <addr> <value> - write byte to address

29 r <addr> - read byte from address

30 s <addr_bits|ras_lines> <value> - override detected addr_bits/ras_lines

31 t <addr> - test address

32 d - detect DRAM

33 h - help