https://github.com/reybits/dram-tester
Simple Arduino DRAM tester. It supports up to 9 address lines.
https://github.com/reybits/dram-tester
arduino electronics oldschool ram tester zx-spectrum
Last synced: 6 months ago
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Simple Arduino DRAM tester. It supports up to 9 address lines.
- Host: GitHub
- URL: https://github.com/reybits/dram-tester
- Owner: reybits
- License: mit
- Created: 2022-02-20T14:46:27.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2025-03-23T09:50:03.000Z (7 months ago)
- Last Synced: 2025-03-23T10:28:30.962Z (7 months ago)
- Topics: arduino, electronics, oldschool, ram, tester, zx-spectrum
- Language: C++
- Homepage:
- Size: 290 KB
- Stars: 3
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# DRAM Tester
Simple Arduino DRAM tester. It supports up to 9 address lines and is compatible with various DRAM chips.
By default, it supports the 4164 DRAM chip.
## Read / Write cycles
### Read Cycle
### Write Cycle
## Arduino Nano connections
### DRAM 4164 / 41256 pinout
```
-------------------
(PB0) 5 --| A0 | | |
(PB1) 7 --| A1 | 4164/ | |
(PB2) 6 --| A2 | 41256 | |
(PB3) 12 --| A3 | | |
(PB4) 11 --| A4 | | DO |-- 14 (PD3)
(PB5) 10 --| A5 | | |
(PC0) 13 --| A6 | | |
(PC1) 9 --| A7 | | |
(PC2) 1 --| A8* | | |
|-----| |-----|
(PD2) 2 --| DI | | |
|-----| | |
(PD5) 4 --o RAS | | +5V |-- 8 (PC3)
(PD4) 15 --o CAS | | |
(PD6) 3 --o WE | | GND |-- 16
-------------------
```
### LED
```
(PC4) LED Green
(PC5) LED Red
```
### Button
```
(PC5) Start Button
```
## How to use arduino-cli
[Arduino CLI](https://create.arduino.cc/projecthub/B45i/getting-started-with-arduino-cli-7652a5)