Apple-2-HW
/
TommyPROM
mirror of https://github.com/TomNisbet/TommyPROM.git
2
0
Fork 1
Code Issues Projects Releases Wiki Activity

Create README.md

This commit is contained in:
Tom Nisbet 2024-03-16 23:54:56 -04:00 committed by GitHub
parent 2058bc03b0
commit 2f862bf829
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
HardwareVerify/README.md Normal file
View File

@ -0,0 +1,19 @@
# Hardware Verify Script
This is a sketch for low-level debugging of the TommyPROM hardware. It allows the EEPROM data, address,
and control pins to be individually set so that they can be probed to catch wiring errors. The usage is
described in the [Troubleshooting documentation page](https://tomnisbet.github.io/TommyPROM/docs/troubleshooting).
This sketch should only be used for debugging if the main TommyPROM sketch does not seem to be working. To
get started with a new TommyPROM build, load the TommyPROM sketch into the hardware and try the Unlock,
Display and Zap commands to test reading and writing. For example:
```
u
d0 ff
z0
d0 ff
```
The above commands will Unlock the Software Data Protection, Display the first 256 bytes, burn a
sequence of test data into the first 32 bytes, and then Display the first 256 bytes again.