diff --git a/readme.md b/readme.md index 30b70b9..8a1d752 100644 --- a/readme.md +++ b/readme.md @@ -85,8 +85,7 @@ Put differently: it starts executing instructions at the address contained in `$ ### Keypad -The value of the latest keypress on a hex keypad is stored at `$20`. -(The keypad can also be relocated by changing the value of the pointer-to-keypad at `$22`.) +The value of the latest keypress on a hex keypad is stored at `$1B`. The keypad uses the same layout as the COSMAC VIP (and CHIP-8). The CPU simulator maps those keys onto a Qwerty set.