Family BASIC Keyboard: Difference between revisions
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| LEFT || RIGHT || UP || CLR HOME || INS || DEL || SPACE || DOWN | | LEFT || RIGHT || UP || CLR HOME || INS || DEL || SPACE || DOWN | ||
|} | |} | ||
== Shifted characters == | |||
1 ! | |||
2 " | |||
3 # | |||
4 $ | |||
5 % | |||
6 & | |||
7 ' | |||
8 ( | |||
9 ) | |||
- = | |||
; + | |||
: * | |||
, < | |||
. > | |||
/ ? | |||
== References == | == References == | ||
Reverse-engineered schematics by [http://www2.odn.ne.jp/~haf09260/index.htm Enri]: | Reverse-engineered schematics by [http://www2.odn.ne.jp/~haf09260/index.htm Enri]: | ||
Revision as of 04:57, 22 March 2013
The Family Basic Keyboard (HVC-007) was a peripheral released with the Family Basic package in 1984. With the data recorder that could be attached to it, it allowed the Famicom to have the abilities of the average home computer of around that time. It is a generic 72 button keyboard using common matrix logic, and can be connected to the Famicom at the expansion port.
Keyboard map
F1 F2 F3 F4 F5 F6 F7 F8
1 2 3 4 5 6 7 8 9 0 - ^ ¥ STOP CH* INS DEL
ESC Q W E R T Y U I O P @ [ ENTER UP
CTR A S D F G H J K L ; : ] KANA LEFT RIGHT
SHIFT Z X C V B N M , . / _ SHIFT DOWN
GRPH SPACE
* CH = CLR HOME
Mind that the DEL key function is actually that of Backspace we all know and love.
Hardware interface
Input ($4016 write)
7 bit 0
---- ----
xxxx xKCR
|||
||+-- Reset the keyboard to the first row.
|+--- Select column, row is incremented if this bit goes from high to low.
+---- Enable keyboard matrix (if 0, all voltages inside the keyboard will be 5V, reading back as logical 0 always)
Incrementing the row from the (keyless) 10th row will cause it to wrap back to the first row.
Output ($4017 read)
7 bit 0 ---- ---- xxxK KKKx | ||| +-+++--- Receive key status of currently selected row/column.
Any key that is held down, will read back as 0.
($4016 reads from the data recorder.)
Matrix
| Column 0 | Column 1 | |||||||
|---|---|---|---|---|---|---|---|---|
| $4017 bit | 4 | 3 | 2 | 1 | 4 | 3 | 2 | 1 |
| Row 0 | ] | [ | ENTER | F8 | STOP | ¥ | RSHIFT | KANA |
| Row 1 | ; | : | @ | F7 | ^ | - | / | _ |
| Row 2 | K | L | O | F6 | 0 | P | , | . |
| Row 3 | J | U | I | F5 | 8 | 9 | N | M |
| Row 4 | H | G | Y | F4 | 6 | 7 | V | B |
| Row 5 | D | R | T | F3 | 4 | 5 | C | F |
| Row 6 | A | S | W | F2 | 3 | E | Z | X |
| Row 7 | CTR | Q | ESC | F1 | 2 | 1 | GRPH | LSHIFT |
| Row 8 | LEFT | RIGHT | UP | CLR HOME | INS | DEL | SPACE | DOWN |
Shifted characters
1 ! 2 " 3 # 4 $ 5 % 6 & 7 ' 8 ( 9 ) - = ; + : * , < . > / ?
References
Reverse-engineered schematics by Enri:
- http://www2.odn.ne.jp/~haf09260/Famic/Fambas.htm
- Also available here and here
