Raspberry Pi Interface to Cosmac Elf

elf2bin Utility

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

cc -o elf2bin -lwiringPi elf2bin.c

./elf2bin -s 0 -e ff | hexdump -C
00000000  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00000100

bin2elf Utility

https://pinout.xyz/#

http://hex2bin.sourceforge.net/

hexdump

/dev/null

Tools

• elf -i load|run|wait|reset|write|get|put

wiringPi

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

-- Peter Schmid - 2017-11-26

Comments

• gpio-numbers-pi2.png: