Apple-2-HW/TommyPROM
2
0
Fork 1
mirror of https://github.com/TomNisbet/TommyPROM.git synced 2024-12-22 09:29:38 +00:00
Code Issues Projects Releases Wiki Activity

Update HW verifier readme

Browse Source
This commit is contained in:
Tom Nisbet 2019-06-09 20:10:15 -04:00
parent ac512a2740
commit 702de2ba96
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
HardwareVerify/README.md
View File

@ -1,10 +1,12 @@
## hardware Verifier Tool ## Hardware Verifier Tool
This tools allows access to individual control lines from the Arduino to verify that the hardware was assembled correctly. This tool allows access to individual control lines from the Arduino to verify that the hardware was assembled correctly.
It can be used without a chip installed to scope out address and data lines. It also offers low-level control when the chip It can be used without a chip installed to scope out address and data lines. It also offers low-level control when the chip is installed.
is installed.
Note that the comamnds allow for direct writing of the 28C control lines with some exceptions to protect the chip and the host arduino: THIS TOOL USES DIRECT PORT ACCESS ON THE ARDUINO. CHECK TO MAKE SURE IT IS
COMPATIBLE WITH YOUR BOARD BEFORE USING. It will work correctly on the Unu, Nano, and Boarduino. It WILL NOT WORK on the Micro.
Note that the comamnds write access to the individual 28C control lines with some exceptions to protect the chip and the host arduino:
* When the O command is used to enable chip output, the arduino data bus is set to INPUT * When the O command is used to enable chip output, the arduino data bus is set to INPUT
* When the D command is used to write data from the arduino, the chip output is disabled * When the D command is used to write data from the arduino, the chip output is disabled