Symbolics ADB Adapter Mapping

Symbolics manufactured an adapter box that allows connection of the Symbolics keyboard and a three-button Logitech mouse to the ADB bus of a MacIvory, in place of the Apple Extended keyboard and a one-button mouse.

The following table pertains when the KMAP resource 39 (decimal) is used with keyboard layout KCHR resource 0 “US + Symbolics.” Key identifications were made by inspecting the resources using KCAP 39. The “Mac Key” column indicates the key on the Apple Extended Keyboard II (US version) which produces the same virtual key code. (See Inside Macintosh:Text, Appendix C and Inside Macintosh:Toolbox Essentials, Chapter 2). The raw ADB keycodes are determined by inverting the mapping of the KCHR resource. The “scan code” is the clock pulse, counting from zero after the reset, for which the keyboard drives low for the key down. (It appears that the ADB raw code is derived by the same sequence but with “dead” pulses omitted.)

Because of the lack of multi-button mouse support in Mac System 7, I presume that the three-button mouse emulates the same “arrow-key plus mouse-click” gesture that is used with the Apple keyboard and single-button mouse under Genera. ADB provides an encoding for multiple mouse buttons, but a similar translation would have to be provided in the ADB driver code to make them apparent to Mac applications. (My ADB box is currently not working, so I can’t confirm this.)

Symbolics	Scan code	Raw Key	Virtual Key	Mac Key	Comment
Key Label	(hex)	Code (hex)	Code (hex)	Equivalent
A	39	29	00	A
S	2E	21	01	S
D	3A	2A	02	D
F	2F	22	03	F
H	30	23	04	H
G	3B	2B	05	G
Z	17	10	06	Z
X	23	19	07	X
C	18	11	08	C
V	24	1A	09	V
[none]			0A	none	would produce character $A4/$B1
B	19	12	0B	B
Q	4F	39	0C	Q
W	44	31	0D	W
E	50	3A	0E	E
R	45	32	0F	R
Y	46	33	10	Y
T	51	3B	11	T
1!	64	48	12	1!
2@	5A	41	13	2@
3#	65	49	14	3#
4$	5B	42	15	4$
6^	5C	43	16	6^
5%	66	4A	17	5%
=+	5F	46	18	=+
9(	68	4C	19	9(
7&	67	4B	1A	7&
-_	69	4D	1B	-_
8*	5D	44	1C	8*
0)	5E	45	1D	0)
[none]			1E	]}
O	53	3D	1F	O
U	52	3C	20	U
[none]			21	[{
I	47	34	22	I
P	48	35	23	P
Return	33	26	24	Return
L	3D	2D	25	L
J	3C	2C	26	J
‘”	3E	2E	27	‘”
K	31	24	28	K
;:	32	25	29	;:
[none]			2A	\|
,<	26	1C	2B	,<
/?	27	1D	2C	/?
N	25	1B	2D	N
M	1A	13	2E	M
.>	1B	14	2F	.>
Tab	4E	38	30	Tab
Space	10	0C	31	Space
`~	6A	4E	32	`~
Rubout	2D	20	33	Delete
[none]			34
Select	0C	08	35	Esc
[none]			36
Left Super	0E	0A	37	Left Command	not sure
Left Shift	22	18	38	Left Shift
Caps Lock	02	01	39	Caps Lock
Left Meta	04	03	3A	Left Option
Left Control	0F	0B	3B	Left Control
Right Shift	1C	15	3C	Right Shift
Right Meta	11	0D	3D	Right Option
Right Control	05	04	3E	Right Control
[none]			3F	[none]
Right Super	06	05	40
[none]			41	Keypad .
[none]			42
Abort	1E	17	43	Keypad *
Right Hyper	12	0E	44
[none]			45
[none]			46
Clear Input	74	55	47	Keypad Clear
[none]			48
Repeat	1D	16	49
Right Symbol	28	1E	4A
Resume	76	57	4B	Keypad /
Scroll	07	06	4C	Keypad Enter
[none]			4D
[none]			4E	Keypad –
[none]			4F
[none]			50
Suspend	75	56	51	Keypad =
[none]			52	Keypad 0
[none]			53	Keypad 1
[none]			54	Keypad 2
[none]			55	Keypad 3
[none]			56	Keypad 4
[none]			57	Keypad 5
[none]			58	Keypad 6
[none]			59	Keypad 7
[none]			5A
[none]			5B	Keypad 8
[none]			5C	Keypad 9
[none]			5D
: (in upper left)	59	40	5E
Local	01	00	5F		Keyboard overlay uses F14, which would be virtual keycode $6B
[none]			60	F5
Square	71	52	61	F6
Circle	72	53	62	F7
[none]			63	F3
Triangle	73	54	64	F8
Function	43	30	65	F9
[none]		[66]	66		If raw key code $66 occured, it would translate to character $10
Network	38	28	67	F11
\{	60	47	68
[none]			69	F13
|}	6B	4F	6A
[none]			6B	F14	See Local, virtual key $5F
([	54	3E	6C
Escape	6F	50	6D	F10
)]	49	36	6E
Refresh	70	51	6F	F12
[none]		[70]	70		if raw $70 occured, it would translate to virtual key $70, character $10
Mode Lock	08	07	71	F15
Help	29	1F	72	Help
Complete	34	27	73	Home
Page	4A	37	74	Page Up
Backspace	55	3F	75	Forward Delete
[none]			76
End	13	0F	77	End
[none]			78	F2
Line	3F	2F	79	Page Down
[none]			7A	F1
Left Hyper	03	02	7B	Left Arrow
[none]			7C	Right Arrow	Used for mouse button?
[none]			7D	Down Arrow	Used for mouse button?
Left Symbol	0D	09	7E	Up Arrow
[none]		7F	7F	(Power key gives 7F7F)	Raw key code $7F would map to virtual key $7F