Apple-2-HW/TommyPROM
2
0
Fork 1
mirror of https://github.com/TomNisbet/TommyPROM.git synced 2024-11-21 19:31:12 +00:00
Code Issues Projects Releases Wiki Activity

Update README.md

Browse Source 
add link to 28C256 notes
This commit is contained in:
Tom Nisbet 2022-08-07 08:54:50 -04:00 committed by GitHub
parent 78e14a26b0
commit 7483cc5b59
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
unlock-ben-eater-hardware/README.md
View File

@ -7,7 +7,9 @@ Utility to unlock 28C256 Software Data Protection (SDP) for the
programmer design. This hardware is similar to the TommyPROM hardware, but it uses programmer design. This hardware is similar to the TommyPROM hardware, but it uses
different shift register chips and different pin assignments. different shift register chips and different pin assignments.
To meet the timing requirements of the SDP unlock, this code uses direct port writes To meet the
[timing requirements of the SDP unlock](https://tomnisbet.github.io/TommyPROM/28C256-notes/),
this code uses direct port writes
to set and read values on the data bus. It will work with Arduino Uno and Nano hardware, to set and read values on the data bus. It will work with Arduino Uno and Nano hardware,
but would require changes for other platforms. but would require changes for other platforms.