MZ-80K Keyboard Map

written by Maurice Hawes
Source: SUC-magazine July 2001, Volume 21, Number 2, p. 10

Nothing is given in the MZ-80K Owner's Manual, but the MZ-80K keyboard map is very simply arranged; just compare the table below with the actual keyboard, and you will see what I mean.

( Note that unused points in the matrix are indicated by two rows of "****" )

		KEY DATA BITS
		0	1	2	3	4	5	6	7
		X= $01	$02	$04	$08	$10	$20	$40	$80
		( Bit is zero if key is pressed )
Y =	$F0	1	3	5	7	9	+ -	G2	G4
	$F1	2	4	6	8	0	G1	G3	G5
	$F2	Q	E	T	U	O	* =	G7	G9
	$F3	W	R	Y	I	P	G6	G8	G10
	$F4	A	D	G	J	L	£	G12	G14
	$F5	S	F	H	K	:	G11	G13	G15
	$F6	Z	C	B	M	.	SML CAP	G17	G19
	$F7	X	V	N	,	/	G16	G18	G20
	$F8	LSHIFT	INST DEL	** **	RIGHT LEFT	CR	RSHIFT	G22	G24
	$F9	CLR HOME	SPACE	UP DOWN	BREAK	** **	G21	G23	G25

The 25 keys in the separate MZ-80K graphics keypad appear in the map above as G1 - G25. Physically they are laid out as:

G1	G2	G3	G4	G5
G6	G7	G8	G9	G10
G11	G12	G13	G14	G15
G16	G17	G18	G19	G20
G21	G22	G23	G24	G25

NOTE: On the MZ-80K, as shown above, the two SHIFT keys are mapped in different columns; but they are in the same row, so it is possible to check both SHIFT keys in one scan i.e. STROBE row $F8 then check KEY DATA BIT 0 and KEY DATA BIT 5 in one logic operation ( for example, CPL then AND $21 will give a ZERO result if neither of the SHIFT keys is being pressed ).