media/drivers/radiotrack.rst

1 .. SPDX-License-Identifier: GPL-2.0
11 ----------------
19 Lab (http://www.aimslab.com/) RadioTrack card was made available to the
21 want to use the RadioTrack card in an environment other than MS Windows.
24 ------------------
26 I have a RadioTrack card from back when I ran an MS-Windows platform.  After
27 converting to Linux, I found Gideon le Grange's command-line software for
28 running the card, and found that it was good!  Frans Brinkman made a
29 comfortable X-windows interface, and added a scanning feature.  For hack
32 broadcast TV channels, situated just below and above the 87.0-109.0 MHz range.
34 Linux and gained some insights about the hardware design used for the card.
36 So, without further delay, here are the details.
40 --------------------
42 The RadioTrack card is an ISA 8-bit FM radio card.  The radio frequency (RF)
53 CONTROLLING THE CARD WITH IOPORT
54 --------------------------------
59 (or blocks) of the radio card.  This way, many functions can be changed in
61 the ioports appears to be the "Stereo Detect" bit.
65 .. code-block:: none
68 	+------+------+------+--------+--------+-------+---------+--------+
70 	|  (+) |  (-) |      | Detect | Audio  | (bit) | (latch) | Update |
72 	+------+------+------+--------+--------+-------+---------+--------+
79 0	 1  volume +    (some delay required)
80 1	 0  volume -    (some delay required)
85 Stereo Detect Enable	Description
87 0			No Detect
88 1			Detect
112 24-bit code, where bits = (freq*40) + 10486188.
125 --------------------
127 .. code-block:: none
129 	Default:        BASE <-- 0xc8  (current volume, no stereo detect,
132 	Card Off:	BASE <-- 0x00  (audio mute, no stereo detect,
135 	Card On:	BASE <-- 0x00  (see "Card Off", clears any unfinished business)
136 			BASE <-- 0xc8  (see "Default")
138 	Volume Down:    BASE <-- 0x48  (volume down, no stereo detect,
141 			BASE <-- 0xc8  (see "Default")
143 	Volume Up:      BASE <-- 0x88  (volume up, no stereo detect,
146 			BASE <-- 0xc8  (see "Default")
148 	Check Stereo:   BASE <-- 0xd8  (current volume, stereo detect,
151 			x <-- BASE     (read ioport)
152 			BASE <-- 0xc8  (see "Default")
160 			BASE <-- 0x01  (audio mute, no stereo detect, radio
162 			BASE <-- 0x03  (audio mute, no stereo detect, radio
165 			BASE <-- 0x05  (audio mute, no stereo detect, radio
167 			BASE <-- 0x07  (audio mute, no stereo detect, radio