Mattel Aquarius


Connecting an external keyboard to the Aquarius

This page is under construction but the pictures might give you an idea. 

COLSCAN:
 1 |  = BS  : RTN ;  .  bit0  254  0xFE
 2 |  -  /  0  p  l  ,  bit1  253  0xFD
 3 |  9  o  k  m  n  j  bit2  251  0xFB
 4 |  8  i  7  u  h  b  bit3  247  0xF7
 5 |  6  y  g  v  c  f  bit4  239  0xEF
 6 |  5  t  4  r  d  x  bit5  223  0xDF
 7 |  3  e  s  z SP  a  bit6  191  0xBF
 8 |  2  w  1  q SH CTL bit7  127  0x7F

ROWSCAN:
 9 | SH SP  d  c  h  n  l  ;  bit4  239  0xEF
10 |  q  z  r  v  u  m  p RTN bit3  247  0xF7
11 |  w  e  t  y  i  o  / BS  bit1  253  0xFD
12 |  2  3  5  6  8  9  -  =  bit0  254  0xFE
13 | CTL a  x  f  b  j  ,  .  bit5  223  0xDF
14 |  1  s  4  g  7  k  0  :  bit2  251  0xFB

The keyboard is an Apple keyboard model M0110B. It uses the same technique as the keyboard for the Mattel Aquarius computer; just some X- and Y- lines that are scanned without any extra electronics.
The downside is that not all the keys are in the same position as the Aquarius keyboard. Now I have to press an @, on the Apple keyboard, if I need a double quote ("). This is because the double quote on the Aquarius keyboard is located above the '2'.
I have connected the 2x 2 keys beside the spacebar together and this is now functioning as my [Reset] key.