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1.1 root 1: ttnn -- Device Driver
2:
3:
4: /ddeevv/ttnn* provides access to an ARCNET local area network via a Tiac 236
5: card, Tiac 238 card or equivalent (e.g., Pure Data ARCNET card). Each
6: entry is assigned major device number 20, and may be accessed as a
7: character-special device.
8:
9: The ttnn driver supports up to four ARCNET cards in a single computer. Minor
10: devices 0, 1, 2, and 3 refer to each card. For a card to work properly, it
11: must have a unique interrupt, 64-kilobyte memory bank, and port number
12: assigned to it. The driver must also be configured to the same interrupt,
13: memory bank, and port number. You can use the command /ccoonnff/ppaattcchh to build
14: a properly configured version of the kernel; see the Lexicon article hhss for
15: sample commands. If loadable device drivers are used they may be
16: configured in the identical fashion.
17:
18: For an interface to be accessible from the COHERENT system, a device file
19: must be present in directory /ddeevv with the appropriate type, major and
20: minor device numbers, and permissions. You can use the command mmkknnoodd to
21: creates a special file for a device, as follows:
22:
23: /eettcc/mmkknnoodd /ddeevv/ttnn00 cc 2200 00
24: /eettcc/mmkknnoodd /ddeevv/ttnn11 cc 2200 11
25:
26: It is usual to have a generic LAN interface /ddeevv/ttnn. This is associated
27: with a particular LAN card by the following command:
28:
29: /bbiinn/llnn -ff /ddeevv/ttnn00 /ddeevv/ttnn
30:
31: This device driver provides a raw interface to the LAN. To communicate
32: with other computers on the network, it is normally necessary to add some
33: higher level protocol (e.g., XNS or TCP/IP).
34:
35: _F_i_l_e_s
36: /ddeevv/ttnn* -- LAN network access special file
37: /ddeevv/ttnn -- Default LAN
38:
39: _S_e_e _A_l_s_o
40: ddeevviiccee ddrriivveerrss, llnn, mmkknnoodd
41:
42: _N_o_t_e_s
43: As delivered, the LAN driver supports one card with interrupt 2, port
44: 0x2E0, and bank 0xD000.
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