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The comp.sys.apple2 Usenet newsgroup Apple II FAQs originate from
the Ground Apple II archive. Administrator: Steve Nelson
Csa2 FAQs-on-Ground resource file: R023PINOUTS.TXT
Apple II Pinouts
Note: To correctly view tables and diagrams on a super-res display,
use a mono-spaced Font such as CoPilot or PCMononspaced.
____________________________
Apple II Pinouts
Compiled by Charles T. 'Dr. Tom' Turley
8/21/98
Contents:
GS Motherboard power connector
Apple II+/IIe Power Supply Socket
9 pin game port connector
//e, //c, Laser, and Mac Plus Mouse pinouts
Apple 16-pin DIP Game Port socket (on the motherboard)
for II, II+, IIe, IIgs
Apple II Joystick
//e expansion slot pinouts
IIc+ internal modem connector
Mini DIN-8 IIgs Serial Port (also IIc+ and Macintosh)
Cable to connect IIgs to a serial Dsub-25 printer
//c serial port pinouts
IIgs ADB (keyboard) socket
GS RGB monitor socket & monitor connections
6502 pinout
5.25" and 3.5" disk cables
Apple //c Video Expansion port
Apple //c Power Connector
Apple ][+/IIe 16-pin keyboard socket
Apple //e Kumeric Keypad matrix and connector.
Apple //e Numeric Keypad cable
GS Motherboard power connector
_
| |
|7| -5V 0.25 A
|6| -12V 0.25 A
|5| +12V 1.0 A
|4| +5V 4.0 A
|3| No connection
|2| GND
|1| GND
|_|
The pins are numbered as above when you are sitting in front of the
computer, i.e. 7 is closest to the back of the motherboard.
____________________________
Apple II+/IIe Power Supply Socket
II+/IIe Power Supply Socket Power Supply Output Ratings
_________
/ \ +5V @ 2.50 Amps (continuous)
-12V | 5 6 | -5V -5V @ 0.25 Amps (continuous)
| | +12V @ 1.50 Amps (continuous)
+5V | 3 4 | +12V -12V @ 0.25 Amps (continuous)
| |
GND | 1 2 | GND
|_________|
____________________________
Apple Game Port (9-pin connector):
Dsub-9 Female Socket (on computer)
,---------------------.
\ 5 4 3 2 1 /
\ 9 8 7 6 /
`-----------------'
Pin 1 - Pushbutton 1
Pin 2 - +5V Power
Pin 3 - Ground
Pin 4 - Game Control 2 or PDL2 (Joystick-2 X-axis)*
Pin 5 - Game Control 0 or PDL0 (Joystick-1 X-axis)
Pin 6 - Pushbutton 2*
Pin 7 - Pushbutton 0 (usually the "Fire" button)
Pin 8 - Game Control 1 or PDL1 (Joystick-1 Y-axis)
Pin 9 - Game Control 3 or PDL3 (Joystick-2 Y-axis)*
- Note: These functions are not available on the //c or IIc+.
___________________________
//e, //c, Laser 128, and Mac Plus Mouse pinouts
The IIe/IIc/Mac Plus mouses can plug into the //c or IIc+
Game/Mouse port or, on a IIe, into the 9-pin socket of a
Mouse Card. When plugged into the //c or IIc+, several pins
are redefined for use with a mouse.
[Info from David Empson and David Wilson]
Dsub-9 Female Socket on Computer Dsub-9 Male Plug on Mouse
,---------------------. ,---------------------.
\ 5 4 3 2 1 / \ 1 2 3 4 5 /
\ 9 8 7 6 / \ 6 7 8 9 /
`-----------------' `-----------------'
Mouse Usual //c, IIc+ Game Port Function
1 MOUSE ID Pushbutton 1
2 +5V +5V
3 GND GND
4 XDIR no Game Port function on //c, IIc+;
this TTL-compatible input can be read at $C066
5 XMOVE Game Control 0 or PDL0 (Joystick X-axis)
6 n.c. (no Game Port function on //c, IIc+)
7 MOUSE BUTTON Pushbutton 0
8 YDIR Game Control 1 or PDL1 (Joystick Y-axis)
9 YMOVE no Game Port function on //c, IIc+;
this TTL-compatible input can be read at $C067
____________________________
Apple 16-pin DIP Game Port socket (on the motherboard)
for II, II+, IIe, IIgs
=========
Pushbutton 3 (GS only) 9 | * * | 8 Ground
Gm Ctrl 1 (Stick-1 Y) 10 | * * | 7 Gm Ctrl 2 (Stick-2 X)
Gm Ctrl 3 (Stick-2 Y) 11 | * * | 6 Gm Ctrl 0 (Stick-1 X)
Annunciator 3 12 | * * | 5 /$C040 Strobe
Annunciator 2 13 | * * | 4 Pushbutton 2
Annunciator 1 14 | * * | 3 Pushbutton 1
Annunciator 0 15 | * * | 2 Pushbutton 0
No Connection 16 | * * | 1 +5V
===| |===
^
Notch on socket
(faces toward front of computer)
Game Port Information (with BASIC Peek/Poke locations) obtained
from pages 430-433 of the Apple // User's Guide, Second Edition
by Lon Poole:
-16296 Annunciator 0 Off
Turns off game control output (annunciator) number 0. The voltage
on pin 15 of the game control is set to approximately
0 volts (TTL low).
-16295 Annunciator 0 On
Turns on game control output (annunciator) number 0. The voltage
on pin 15 of the game control is set to approximately
+5 volts (TTL high).
The following annunciator soft switches follow the same rules as
annunciator 0 for their respective pin assignments:
-16294 Annunciator 1 Off
-16293 Annunciator 1 On
-16292 Annunciator 2 Off
-16291 Annunciator 2 On
-16290 Annunciator 3 Off
-16289 Annunciator 3 On
-16287 Read Pushbutton 0
When the pushbutton on game control number 0 or the open-apple key
is being pressed, the value in this location exceeds 127. When it
is not being pressed, the value is 127 or less.
The following pushbutton soft switches follow the same rules as
pushbutton 0 for their respective pin assignments:
-16286 Read Pushbutton 1
-16285 Read Pushbutton 2
-16320 Stobe Output
Normally pin 5 of the game control connector is +5 volts. If you
PEEK memory location -16320, it drops to 0 volts for one-half
microsecond. POKE will trigger the strobe twice.
The following is a direct exerpt from page 167 of the Apple //e
Reference Manual:
"The hand-control inputs are connected to the timing inputs of an
NE558 quadruple 555-type analog timer. Addressing $C07x sends a
signal from the 74LS154 that resets all four timers and causes
their outputs to go one (high). A variable resistance of up to
150K ohms connected between one of these inputs and the +5V
supply controls the charging time of one of four 0.022-microfarad
capacitors. When the voltage on the capacitor passes a certain
threshhold, the output of the NE558 changes back to zero (low).
Programs can determine the setting of a variable resistor by
resetting the timers and then counting time until the selected
timer input changes from high to low. The resulting count is
proportional to the resistance."
Basically, the above excerpt is a long description of the
BASIC PDL() function.
____________________________
Apple II Joystick
(9-pin male connector) (Old 16-pin IC-style plug)
[2]--------------- +5V ------- 1
[7]--------------- Button 0 ("Fire") ------- 2
[5]--------------- X-axis ------- 6
[8]--------------- Y-axis ------- 10
[1]--------------- Button 1 ("Aux") ------- 3
[3]--------------- Ground ------ 8
____________________________
Apple //e Expansion (not memory) Slot pinout
The following information is from pages 172-174 of the Apple //e
Reference Manual regarding the pinout of the expansion slots.
(A leading "~" to indicates an active Low signal.)
Pin 1 - I/O SELECT - Normally high; goes low during phase 0 when
the 6502 addresses location $CnXX, where n is the connector
number. This line can drive 10 LS TTL loads.*
Pin 2-17 - A0-A15 - Three-state address bus. The address becomes
valid during phase 1 and remains valid during phase 0. Each
address line can drive 5 LS TTL loads.*
Pin 18 - R/~W - Buffered read/write line. Valid at the same time
as the address bus; high during a read cycle, low during a write
cycle. It can drive 2 LS TTL loads.*
Pin 19 - ~SYNC - Composite horizontal and vertical sync, on
expansion slot 7 ONLY. This line can drive 2 LS TTL loads.*
Pin 20 - ~I/O STROBE - Normally high; goes low during phase 0
when the 6502 addresses a location between $C800 and $CFFF.
This line can drive 4 LS TTL loads.*
Pin 21 - RDY - Input to the 6502. Pulling this line low during
phase 1 halts the 6502 with the address bus holding the address
of the location currently being fetched. This line has a
3300 ohm pullup resistor to +5V.
Pin 22 - ~DMA - Input to the address bus buffers. Pulling this
line low during phase 1 disconnects the 6502 from the address
bus. This line has a 3300 ohm pullup resistor to +5V.
Pin 23 - INT OUT - Interrupt priority daisy-chain output.
Usually connected to pin 28 (INT IN). Note: On slot 7 ONLY,
this pin can be connected to the graphics-mode signal GR
(Not available on revision A boards).
Pin 24 - DMA OUT - DMA priority daisy-chain output. Usually
connected to pin 22 (DMA IN).
Pin 25 - +5V - +5V power supply. A total of 500mA is available
for all accessory cards.
Pin 26 - GND - System common ground.
Pin 27 - DMA IN - DMA priority daisy-chain input. Usually
connected to pin 24 (DMA OUT).
Pin 28 - INT IN - Interrupt priority daisy-chain input. Usually
connected to pin 23 (INT OUT).
Pin 29 - ~NMI - Non-maskable interrupt to 6502. Pulling this
line low starts an interrupt cycle with the interrupt-handling
routine at location $03FB. This line has a 3300 ohm pullup
resistor to +5V.
Pin 30 - ~IRQ - Interrupt request to 6502. Pulling this line low
starts an interrupt cycle only if the interrupt-disable (I) flag
in the 6502 is not set. Uses the interrupt-handling routine at
location $03FE. This line has a 3300 ohm pullup resistor to +5V.
Pin 31 - ~RES - Pulling this line low initiates a reset routine.
Pin 32 - ~INH - Pulling this line low during phase 1 inhibits
(disables) the memory on the main circuit board. This line has
a 3300 ohm pullup resistor to +5V.
Pin 33 - -12V - -12V power supply. A total of 200mA is available
for all accessory cards.
Pin 34 - -5V - -5V power supply. A total of 200mA is available
for all accessory cards.
Pin 35 - 3.58M - 3.58MHz color reference signal, on slot 7 ONLY.
This line can drive 2 LS TTL loads.*
Pin 36 - 7M - System 7MHz clock. This line can drive
2 LS TTL loads.*
Pin 37 - Q3 - System 2MHz asymmetrical clock. This line can
drive 2 LS TTL loads.*
Pin 38 - PHASE1 - 6502 phase 1 clock. This line can drive
2 LS TTL loads.*
Pin 39 - uPSYNC - The 6502 signals an operand fetch by driving
this line high during the first read cycle of each instruction.
Pin 40 - PHASE0 - 6502 phase 0 clock. This line can drive
2 LS TTL loads.*
Pin 41 - ~DEVICE SELECT - Normally high; goes low during
phase 0 then the 6502 addresses location $C0nX, where n is
the connector number plus 8. This line can drive 10 LS TTL loads.*
Pin 42-49 - D0-D7 - Three-state buffered bi-directional data bus.
Data becomes valid during phase 0 high and remains valid until
phase 0 goes low. Each data line can drive one LS TTL load.*
Pin 50 - +12V - +12V power supply. A total of 250mA is available
for all accessory cards.
- Loading limits are for each card.
____________________________
Apple IIc+ internal modem connector
__
|1 | -5V -5 Volts
|2 | RXD Receive Data
|3 | TXD Transmit Data
|4 | DCD Data Carrier Detect
|5 | DTR Data Terminal Ready
|6 | DSR Data Signal Ready
|7 | GND Ground
|__|
____________________________
Mini DIN-8 IIgs Serial Port (also IIc+ and Macintosh)
The IIgs serial port is numbered as follows, looking at the back
of the computer:
Mini-Din 8
IIgs Serial Port
(Female) Socket
8 7 6
5 4 3
2 1
Pin Signal Name and Description*
1 HSKo Handshake output. Driven uninverted from the
SCC's /DTR output.
Voh = 3.6V; Vol = -3.6V; Rl - 450 ohms
2 HSKi Handshake input or external clock. Received
inverted at SCC's /CTS and /TRxC inputs.
Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
3 TxD- Transmit data (inverted). Driven inverted
from SCC's TxD output; tri-stated when SCC's
/RTS is not asserted.
Voh = 3.6V; Vol = -3.6V; Rl = 450 ohms
4 GND Signal ground. Connected to logic and
chassis ground.
5 RxD- Receive data (inverted). Received inverted
at SCC's RxD input.
Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
6 TxD+ Transmit data. Driven uninverted from SCC's
TxD output; tri-stated when SCC's /RTS is not
asserted.
Voh = 3.6V; Vol = -3.6V; Rl = 450 ohms
7 GPi General-purpose input. Received inverted at
SCC's /DCD inputs.
Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
8 RxD+ Receive data. Received uninverted at SCC's
RxD input.
Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
Note: Absolute values of specified voltages are minimums;
Ri is a minimum, Rl is a maximum.
- from IIgs tn030 1990 J. Luther & R. Reynolds
____________________________
Cable to connect IIgs to a serial Dsub-25 printer
The wiring for a serial printer cable would be as follows:
IIgs Printer (Dsub-25)
1 Hshk Out ----> 6 DSR (or possibly 5 CTS, or 8 DCD)
2 HShk In <---- 20 DTR (or possibly 4 RTS)
3 TxD- ----> 3 RxD
4 Gnd ----- 7 Signal Ground
5 RxD- <---- 2 TxD
6 TxD+ No connection
7 GPI No connection
8 RxD+ Loop to signal ground (pin 4 at IIgs or pin 7 at printer)
(Cable shield should be connected to shielding at the IIgs end, and to
pin 1 at the printer end.)
____________________________
//c (5-pin) serial port and modem cable pinouts
(Most of this is from a post by David Empson.)
Din 5
//c Serial Port
(Female) Socket
5 1
4 2
3
The functions are:
1 Handshake Out (nominally DTR)
2 Data Out (TxD)
3 Ground
4 Data In (RxD)
5 Handshake In (nominally DSR)
Din 5
//c Serial Cable
(Male) Plug
1 5
2 4
3
To wire up a IIc to a simple modem without hardware handshaking, use
the following pinout:
IIc Modem
DIN-5 Dsub-25M
1 ----- 20 DTR
2 ----- 2 TxD
3 ----- 7 Gnd
4 ----- 3 RxD
5 ----- 6 DSR (you might want to use pin 8, DCD in some cases)
The IIc cannot do hardware handshaking very well, but this is as close
as you can get:
IIc Modem
DIN-5 Dsub-25M
1 ----- 4 RTS
2 ----- 2 TxD
3 ----- 7 Gnd
4 ----- 3 RxD
5 ----- 5 CTS
The IIc's handshaking lines have annoying side effects, which cause
problems with hardware handshaking:
1. The "Handshake Out" signal is implemented to mean "I want to send
data" (the official and original meaning of RTS). If you turn off
the output handshake line, the IIc will stop sending data. For a
hardware handshaking modem, RTS is supposed to mean "You are allowed
to send me data" (from the computer's point of view).
If the computer tells the modem to stop transmitting, the computer
will also be unable to transmit. This will reduce the rate at which
data can be transferred bidirectionally, but doesn't cause any other
problems.
2. The "Handshake In" signal is implemented to mean "There is receive data
present" (the official meaning of DCD). If the incoming handshake line
is disabled, the IIc will stop receiving data (ignore any data on RxD).
For a hardware handshaking modem, CTS is supposed to mean "You are
allowed to send me data" (from the modem's point of view).
If the modem tells the computer to stop transmitting, the computer will
also be unable to receive, and will discard any data sent by the modem
while CTS is not active. This can cause screen corruption and loss of
data blocks or acknowledgements during a file transfer, which will
require retransmission. It is only likely to be a problem while a
lot of data is being sent, so is more likely to cause problems
during a file upload than a download.
If the comms software is quick enough, it can drop RTS immediately when
CTS is lowered, which will prevent the modem from sending any more data.
You will need the //c System Utilities disk to set up the serial port
speeds, or a comm program that overrides them anyway.
Max speed is 9600.
____________________________
IIgs ADB (keyboard) socket
Female Mini-Din 4
4 3
Ground ----- o o ------ +5V
2 1
reserved ---- o o ---- Data
___ / --- Shell (Gnd)
|___|
Note: There is no connection on any IIgs to
the "reserved" pin.
___________________________
IIGS RGB Connector
Note: "Not used" indicates signals not used by the IIgs RGB monitor.
Dsub-15 (female) socket at back of IIgs
,--------------------------------.
\ 08 07 06 05 04 03 02 01 /
\ 15 14 13 12 11 10 09 /
`----------------------------'
|
|
pin # signal |
|
shell system ground
1 ground (for red)
2 red analog video
3 composite sync
4 (not used)
5 green analog video
6 ground (for green)
7 -5 V (not used)
8 +12 V (not used)
9 blue analog video
10 (not used)
11 audio output (not used)
12 composite video (not used)
13 ground (for blue)
14 (not used)
15 (not used)
____________________________
6502 Microprocessor Pinout
A leading "~" indicates an active Low signal.
Vss 1 |_| 40 ~RESET
RDY 2 39 Phase 2 OUT
Phase 1 OUT 3 38 SO
~IRQ 4 37 Phase 0 IN
(NC) 5 36 (NC)
~NMI 6 35 (NC)
SYNC 7 34 R/~W
Vcc 8 33 D0
A0 9 32 D1
A1 10 31 D2
A2 11 30 D3
A3 12 29 D4
A4 13 28 D5
A5 14 27 D6
A6 15 26 D7
A7 16 25 A15
A8 17 24 A14
A9 18 23 A13
A10 19 22 A12
A11 20 21 Vss
___________________________
3.5" and 5.25" Drive cable pinouts
Much of this information comes from page 90 of Open-Apple Volume 1, number 11
(1985).
The following table lists all of the drive control signals for each type of
controller card/disk port.
signal function Unidisk IIc IIgs/IIc+ Disk ][
GND ground reference 1-4 1-4 1-3 1,3,5,7
-12V -12 volts DC 5 5 5 9
+5V +5 volts DC 6,16 6 6 11,12
+12V +12 volts DC 7,8 7,8 7,8 13,15,17,19
WRPROT write protect 10 10 10 20
PH 0-3 stepper motor phases 11-14 11-14 11-14 2,4,6,8
WREQ write request 15 15 15 10
DRVEN drive enable 17 (9) 17 17 (9) 14
RDDATA read data 18 18 18 16
WRDATA write data 19 19 19 18
EXTINT external interrupt - 9 - -
3.5DISK Apple 3.5 drive enable - - 4 -
HDSEL 3.5" drive head select - - 16 -
not connected - 16 - -
The UniDisk uses pin 9 to select the second drive. Inside each UniDisk,
the signal from pin 9 at the computer is connected to pin 17 of the daisy-
chain drive connector. When the computer selects drive 2 by activating
pin 9, the first drive passes this through and the second drive sees its
enable signal on pin 17. Thus all drives are identical.
The Disk ][ controller has two drive connectors, and the same pin (14) is
used on each connector to select the appropriate drive. This signal is
the only difference between the connectors - all other signals are
connected in parallel.
Despite the IIgs having special functions for pins 4 and 16, they may be
ignored when dealing with 5.25" drives, and treated as a UniDisk controller
(i.e. connect pin 4 to ground, and pin 16 to +5V). The Apple 3.5 drive
disconnects these signals internally, so that they will not interfere with
its operation.
The UniDisk, IIc external drive and equivalents use a Dsub-19 connector, in
which the pins are numbered along the connector, i.e.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19
The Disk ][ uses an IDC-20 (20 pin insulation displacement connector) in
which the pins are numbered in columns, i.e.
2 4 6 8 10 12 14 16 18 20
1 3 5 7 9 11 13 15 17 19
The above numbering is from the back of the plug (where the ribbon cable
connects to the plug). If you are looking at the front of the plug (the
socket side), reverse the rows in the above diagram (top row is 1, 3, ...)
The pin numbering of the Dsub-19 connector does NOT correspond to the wire
numbers in the cable. Pin 1 of the cable goes to pin 1 of the connector,
but pin 2 of the cable goes to pin 11 of the connector.
___________________________
Apple //c Dsub-15 Video Expansion Connector
[Sorry, no cute diagram showing which pin is which]
1- TEXT Video text signal from TMG; set to inverse of GR, except in double
high-resolution mode.
2- 14M 14M master timing signal from the system oscillator.
3- SYNC* Displays horizontal and vertical synchronization signal from IOU
pin 39.
4- SEGB Displays vertical counter bit from IOU pin 4; in text mode,
indicates second low-order vertical counter; in graphics mode, indicates
low-resolution.
5- 1VSOUND One-volt sound signal from pin 5 of the audio hybrid circuit
(AUD).
6- LDPS* Video shift-register load enable from pin 12 of TMG.
7- WNDW* Active area display blanking; includes both horizontal and
vertical blanking.
8- +12V Regulated +12 volts DC; can drive 300mA.
9- PRAS* RAM row-address strobe from TMG pin 19.
10- GR Graphics mode enable from IOU pin 2.
11- SEROUT* Serialized character generator output from pin 1 of the 74LS166
shift register.
12- NTSC Composite NTSC video signal from VID hybrid chip.
13- GND Ground reference and supply.
14- VIDD7 From 74LS374 video latch; causes half-dot shift high.
15- CREF Color reference signal from TMG pin 3; 3.58 MHz.
Note: The signals at the Dsub-15 on the Apple IIc are not the same as
those at the Dsub-15 end of the Apple III, Apple IIGS, and Macintosh II.
Do not attempt to plug a cable intended for one into the other.
Several of these signals, such as the 14 MHz, must be buffered within
about 4 inches of the back panel connector--preferably inside a
container directly connected to the back panel.
___________________________
Apple //c External Power Connector
From the Apple //c Technical Reference Manual
Section 11.2.2 The External Power Connector
The external power supply is attached to the internal converter by means
of a 7-pin DIN connector. The connector pins are identified in Figure
11-1 and Table 11-3.
Figure 11-1 External Power Connector
. --+ +-- Pin# Signal
. / 7 |_| 1 \ Pin 1 Not Connected
. | 6 2 | Pin 2,3 Signal Ground
. \ 5 4 3 / Pin 4 Shield Ground
. \_______/ Pin 5,6 +15 VDC
. Pin 7 Not Connected
Table 11-3 External Power Connector Signals
Pin# Name Description
1,7 -- Not Connected
2,3 Ground Common Electrical Ground
4 Chassis Chassis Ground
5,6 +15 +15-volt DC input to converter
___________________________
Apple II/II+ Keyboard Socket Pinout
This socket is located near the front of the
motherboard.
+---| |----+
+5v | 1 16 | NC
Strobe | 2 15 | -12v
~Reset | 3 14 | NC
NC | 4 13 | Data 1
Data 5 | 5 12 | Data 0
Data 4 | 6 11 | Data 3
Data 6 | 7 10 | Data 2
Gnd | 8 9 | NC
+----------+
Pin Name Description
1 +5 +5 volt power supply. Total current drain on this pin
must be less than 120mA.
2 STROBE Strobe output from keyboard. This line should be given a
pulse at least 10 microsecond long each time a key is
pressed on the keyboard. The strobe can be of either
polarity.
_____ _____
3 RESET Microprocessor's RESET line. Normally high, this line
should be pulled low when the <RESET> key is pressed.
4,9,16 NC No connection.
5-7,10-13 Data Seven bit ASCII keyboard data input.
8 Gnd System electrical ground.
15 -12v -12 volt power supply. Keyboard should draw
less than 50mA.
___________________________
Apple //e Numeric Keypad matrix and connector
The pins are numbered from 1 to 11, with pin 1 being the closest to the
keyboard end of the computer (as far as I can tell). The pin functions
are:
1=Y0, 2=Y1, 3=Y3, 4=Y4, 5=Y2, 6=Y5, 7=no connection, 8=X7, 9=X4,
10=X6, 11=X5.
The X/Y pins refer to keyboard X/Y matrix signals. Closing a specific X/Y
pair is the equivalent of pressing the corresponding key on the keyboard.
The matrix is as follows:
X7 X6 X5 X4
Y5 , + 7 3
Y4 CR . 6 2
Y3 - 9 5 1
Y2 ( 8 4 0
Y1 (see below)
Y0 * ) /
The Y1 row and Y0/X7 intersection vary depending on which keyboard
ROM you have.
The original IIe keyboard ROM (341-0132-B) has SPACE, RIGHT, ESC,
LEFT, ?. I get the impression that this ROM is rare.
The revised IIe keyboard ROM (341-0132-C) has RIGHT, LEFT, UP,
DOWN, ESC.
___________________________
Apple //e Numeric Keypad cable
(This is from a Csa2 post by Mark Wade.)
To construct a suitable internal cable for a IIe numeric
keypad you need a female Dsub-15 to 11 pin female header.
If the female Dsub-15 is numbered like this:
Dsub-15 (female)
,--------------------------------.
\ 08 07 06 05 04 03 02 01 /
\ 15 14 13 12 11 10 09 /
`----------------------------'
And the 11 pin header is numbered like this:
_____________________________________
| |
| 11 10 9 8 7 6 5 4 3 2 1 |
|_____________________________________|
Then:
Dsub-15 | Header
__________|_____________
12 11
11 10
10 9
9 8
NC 7
7 6
6 5
5 4
3 3
2 2
1 1
The header is as viewed on the motherboard. The Dsub-15 is the
female connector that you would plug the keypad into.