Pics

elfdisplay (COSMICOS II) Function Keys

Some Other COSMAC Keypads

RCA COSMAC Microterminal

QUEST Super Elf

Elf 2000

The modes are shown in the display by the decimal points.

RCA COSMAC Microterminal

RCA COSMAC Microterminal

R

Reset: resets the logic of the Microterminal and microprocessor system. Puts the CDP1802 in Reset state.

RU

Run Utility: starts execution of the Utility Program (UT5), which is at location 8000.

RP

Run Program: starts program execution at location 0000 with R0 as program counter.

CONT/STEP

Slide switch to enable continous or single-step operation of the microprocessor system.

Entry Mode Control: this key toggles between the address entry and data entry modes.

INC

Increment Address: each depression increments the address shown in the display. In the data entry mode, it also causes the data byte shown to be written to the address shown before incrementing the address.

$P

Start Addressed Program: starts program execution at the location shown in the address display.

CA

Clear Address: clears (resets) the address display to 0000.

QUEST Super Elf

I

Input

L

Load mode

R

Reset

G

Go (run mode)

W

Wait (processor clock could be stopped)

M

enable Monitor ROM

S

Single step

P

Protect memory

Elf 2000

R

RESET

G

RUN

L

LOAD

M

MP Memory Protect

I

INPUT

Here some ideas if you want to customize your own keypad.

pi@cosmac:~/elf/RaspiElf/tools $ $ test-key /dev/input/by-id/usb-046a_0014-event-kbd
Code: 82 0x52, value 1 key 0 pressed
Code: 82 0x52, value 0 key 0 released 
Code: 79 0x4f, value 1 key 1 pressed
Code: 79 0x4f, value 0 key 1 released
Code: 80 0x50, value 1 key 2 pressed
Code: 80 0x50, value 0 key 2 released
Code: 81 0x51, value 1 key 3 pressed
Code: 81 0x51, value 0 key 3 released
Code: 75 0x4b, value 1 key 4 pressed
Code: 75 0x4b, value 0 key 4 released
Code: 76 0x4c, value 1 key 5 pressed
Code: 76 0x4c, value 0 key 5 released
^C

pi@cosmac:~ $ ls -l /dev/input/by-id/
total 0
lrwxrwxrwx 1 root root 9 May 14 20:23 usb-046a_0014-event-kbd -> ../event0
pi@cosmac:~ $ ls -l /dev/input/by-path/
total 0
lrwxrwxrwx 1 root root 9 May 14 20:23 platform-3f980000.usb-usb-0:1.4:1.0-event-kbd -> ../event0
pi@cosmac:~ $ ls -l /dev/input/event0
crw-rw---- 1 root input 13, 64 May 14 20:23 /dev/input/event0

ESC
00008010  cb d9 f9 5a cc fd 04 00  04 00 04 00 29 00 07 00  |...Z........)...|
00008020  cb d9 f9 5a cc fd 04 00  01 00 01 00 01 00 00 00  |...Z............|
00008030  cb d9 f9 5a cc fd 04 00  00 00 00 00 00 00 00 00  |...Z............|
00008040  cb d9 f9 5a b8 7a 05 00  04 00 04 00 29 00 07 00  |...Z.z......)...|
00008050  cb d9 f9 5a b8 7a 05 00  01 00 01 00 00 00 00 00  |...Z.z..........|
00008060  cb d9 f9 5a b8 7a 05 00  00 00 00 00 00 00 00 00  |...Z.z..........|

Ctrl
00008070  cf d9 f9 5a 66 55 06 00  04 00 04 00 e0 00 07 00  |...ZfU..........|
00008080  cf d9 f9 5a 66 55 06 00  01 00 1d 00 01 00 00 00  |...ZfU..........|
00008090  cf d9 f9 5a 66 55 06 00  00 00 00 00 00 00 00 00  |...ZfU..........|
000080a0  cf d9 f9 5a 94 f1 06 00  04 00 04 00 e0 00 07 00  |...Z............|
000080b0  cf d9 f9 5a 94 f1 06 00  01 00 1d 00 00 00 00 00  |...Z............|
000080c0  cf d9 f9 5a 94 f1 06 00  00 00 00 00 00 00 00 00  |...Z............|

• https://wiki.archlinux.org/index.php/Map_scancodes_to_keycodes

evdev:input:bvpe-

evdev:input:b*v046ap0014* # ML4700
 KEYBOARD_KEY_70039=leftalt  # bind numlock to A
 KEYBOARD_KEY_70039=leftalt  # bind numlock to B
 KEYBOARD_KEY_70039=leftalt  # bind numlock to C
 KEYBOARD_KEY_700e2=leftctrl # bind ESC     to D
 KEYBOARD_KEY_700e2=leftctrl # bind Ctrl    to E
 KEYBOARD_KEY_700e2=leftctrl # bind Alt     to F

How to get and build the RaspiElf Keypad/Display Software

• Linux Keycode Table http://www.comptechdoc.org/os/linux/howlinuxworks/linux_hlkeycodes.html
• http://xahlee.info/linux/linux_keyboard_tools.html

pi@cosmac:~/elf $ git clone https://github.com/spyren/RaspiElf
Cloning into 'RaspiElf'...
remote: Counting objects: 68, done.
remote: Compressing objects: 100% (37/37), done.
remote: Total 68 (delta 32), reused 62 (delta 29), pack-reused 0
Unpacking objects: 100% (68/68), done.
Checking connectivity... done.
pi@cosmac:~/elf $

pi@cosmac:~/elf $ cd RaspiElf
pi@cosmac:~/elf/RaspiElf $ cd tools/
pi@cosmac:~/elf/RaspiElf/tools $ make
cc -g -c elf2bin.c
cc -g -c raspi_gpio.c
cc -g -o elf2bin -lwiringPi elf2bin.o raspi_gpio.o
cc -g -c bin2elf.c
cc -g -o bin2elf -lwiringPi bin2elf.o raspi_gpio.o
cc -g -c elf.c
cc -g -o elf -lwiringPi elf.o raspi_gpio.o
pi@cosmac:~/elf/RaspiElf/tools $ 

pi@cosmac:~/elf/RaspiElf/tools $ sudo make install
install -m 557 elf2bin bin2elf elf /usr/local/bin

pi@cosmac:~/elf/RaspiElf/chase $ bin2elf -e 7fff </dev/zero
0x8000 bytes written

pi@cosmac:~/elf/RaspiElf/chase $ bin2elf -w -r chase.bin
0x002d bytes written

pi@cosmac:~/elf/RaspiElf/chase $ elf load
01 1 0 0 1 1 0 0c

pi@cosmac:~/elf/RaspiElf/chase $ elf2bin -e 3f | hexdump -C
0x0040 bytes read
00000000  c0 00 03 e3 90 b3 f8 30  a3 f8 01 53 64 6c 23 fa  |.......0...Sdl#.|
00000010  fe 3a 1a f0 f6 c7 f8 80  30 1f f0 fe c7 f8 01 53  |.:......0......S|
00000020  f8 14 b2 22 92 3a 23 c5  7a 38 7b 30 0c 00 00 00  |...".:#.z8{0....|
00000030  04 ff 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040

pi@cosmac:~/elf/RaspiElf/chase $ elf
02 1 1 0 1 1 1 ff
pi@cosmac:~/elf/RaspiElf/chase $ elf -v 
LED:01 Q:1 Rx:1 IN:0 WAIT:1 CLR:1 READ:0 SWITCH:0c

pi@cosmac:~/elf/RaspiElf/chase $ elf -n read
02 1 1 0 1 1 0 ff

pi@cosmac:~/elf/RaspiElf/chase $ elf run

pi@cosmac:~/elf/RaspiElf/chase $ elf put 0
40 1 1 0 0 0 0 00

pi@cosmac:~/elf/RaspiElf/chase $ elf put 80
10 1 1 0 0 0 0 80

pi@cosmac:~/elf/RaspiElf/chase $ elf -v
LED:40 Q:1 Rx:1 IN:0 WAIT:0 CLR:0 READ:0 SWITCH:80
pi@cosmac:~/elf/RaspiElf/chase $ elf -v
LED:02 Q:0 Rx:1 IN:0 WAIT:0 CLR:0 READ:0 SWITCH:80

-- Peter Schmid - 2018-05-03

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