Raspberry Pi Interface to Cosmac Elf

elf2bin Utility

Copies the Elf (Membership Card) memory to a binary file on the Raspberry Pi.

The Raspberry Pi GPIO is used as interface to the Cosmac Elf SBC (e.g. Elf Membership Card parallel port).

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 -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

bin2elf Utility

http://hex2bin.sourceforge.net/

hexdump

/dev/null

elf CLI Tool

• elf [-i] [-v] [-s ] [load|run|wait|reset|write|get|put] []

LED Q IN WAIT CLEAR WRITE SWITCH

-i increment -v verbose

wiringPi

• https://pinout.xyz/#
• http://wiringpi.com/the-gpio-utility/
• http://raspberrypiguide.de/howtos/raspberry-pi-gpio-how-to/

Pi Pin#	Pi Function	Elf Pin DSUB J2	POWER P4	Elf Function
1	3.3 V	(18)	(3)	(VIN, +)
17	3.3 V
2	5 V	(18)	3	VIN, +
4	5 V
27	BCM 0
28	BCM 1
19	BCM 10, MOSI	5, in		IN3
23	BCM 11,SCLK	8, in		IN6
32	BCM 12	22, out, Cathode		O3 (*)
33	BCM 13	13, out, Cathode		O4 (*)
8	BCM 14, TXD	(20)	4, in	RXD, RX (EF3)
10	BCM 15, RXD	(15)	5, out, Cathode	TXD, TX (Q)
36	BCM 16	10, out, Cathode		O6 (*)
11	BCM 17	14, in		WAIT-
12	BCM 18	16, in		CLR-
35	BCM 19	12, out, Cathode		O5 (*)
3	BCM 2, SDA
38	BCM 20
40	BCM 21
15	BCM 22	2, in		IN0
16	BCM 23	3, in		IN1
18	BCM 24	4, in		IN2
22	BCM 25	7, in		IN5
37	BCM 26	11, out, Cathode		O7 (*)
13	BCM 27	17, in		WE-
5	BCM 3, SCL
7	BCM 4	1, in		IN- (EF4)
29	BCM 5	24, out, Cathode		O1 (*)
31	BCM 6	23, out, Cathode		O2 (*)
26	BCM 7, CE1	25, out, Cathode		O0 (*)
24	BCM 8, CE0	9, in		IN7
21	BCM 9, MISO	6, in		IN4
6	GND	(19)	1	GND, -
9	GND	21	6	GND, /ON
14	GND
20	GND
25	GND
30	GND
34	GND
39	GND

Other Tools

hex2bin

Intel Hex or Motorola Hex file converter.

http://hex2bin.sourceforge.net/

> tar xvjf Hex2bin-2.5.tar.bz2 > make > sudo make install

-- Peter Schmid - 2017-11-26

Comments

• gpio-numbers-pi2.png: