BildTel 001 » History » Version 14
laforge, 10/30/2023 08:20 PM
1 | 9 | laforge | {{>toc}} |
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3 | 1 | laforge | h1. BildTel 001 |
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5 | 3 | laforge | The Telekom-branded *BildTel 001* was likely the first commercially available ISDN video phone in Germany. |
6 | 1 | laforge | |
7 | 3 | laforge | {{thumbnail(20231028_114259.jpg,size=400)}} |
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9 | 1 | laforge | |
10 | 9 | laforge | {{thumbnail(isdn-bildtelefon-picture-alliance-zb-matthias-hiekel-11764519.jpg,size=400)}} |
11 | (Only digital marketing picture I could find online, courtesy of Picture Allianze / Matthias Hiekel) |
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13 | 1 | laforge | h2. Architecture |
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15 | The system consists of the following parts: |
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16 | 2 | laforge | * A TV screen with built-in [[BTX__Prestel__Videotex__Minitel|BTX]] decoder (inherited from [[LOEWE_Multitel_TV10]]) |
17 | 1 | laforge | * A keyboard + phone-receiver combo (inherited from [[LOEWE_Multitel_TV10]]) |
18 | * A _desktop-computer-like_ box called the Codec (containing the actual ISDN video telephony part, implemented by AEG/OLYMPIA) |
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19 | * A video camera |
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20 | |||
21 | The BTX Terminal [[LOEWE_Multitel_TV10]] was used as the "user interface" for the device, adding the _codec_ box to turn it into a video phone. |
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23 | 10 | laforge | h3. Codec unit |
24 | 4 | laforge | |
25 | {{thumbnail(20231028_114437.jpg,size=400)}} |
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26 | 6 | laforge | {{thumbnail(20231028_120250.jpg,size=400)}} |
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29 | 8 | laforge | {{thumbnail(20231028_120934.jpg,size=400)}} |
30 | {{thumbnail(20231028_120943.jpg)}} |
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31 | 4 | laforge | |
32 | 13 | laforge | The Codec unit ("Bildeinheit") consists of a variety of different circuit boards: |
33 | * 1x power supply |
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34 | * 4x "mainboards" stacked on top of each other (two sandwiches of two PCBA) |
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35 | ** boards have a number of DIN 41612 slots for plug-in cards |
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36 | * 9x CODEC ADSP boards plugged into slots of the top two mainboards |
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37 | * 1x OUTDIG sandwich, consisting of two PCBA plugged into slots of the top mainboard |
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38 | ** this is the TV output board, generating and digital-analog-converting analog TV signal |
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39 | * 1x FIXME sandwich, consisting of two PCBA plugged into slots of a mainboard |
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40 | ** this is the camera input board, receiving and digitizing the analog TV camera signal |
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41 | |||
42 | h4. AEG-OLYMPIA CODEC ADSP |
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43 | |||
44 | This board exists 9 times in total. There are no visible differences between the boards; also the label on the GAL is identical. |
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45 | |||
46 | PCB Marking: @1601914L11T@ |
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47 | Connector Marking: None |
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48 | |||
49 | {{thumbnail(20231030_105751.jpg,size=400)}} |
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50 | {{thumbnail(20231030_105725.jpg,size=400)}} |
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51 | {{thumbnail(20231030_105648.jpg,size=400)}} |
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54 | |ADI ADSP-2101|Digital Signal Processor| |
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55 | |VX-8111 10.0000 MHz|Crystal Oscillator| |
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56 | |GAL20V8A (4012-001/2)|GAL| |
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57 | |2x IDT 7201SA25J|FIFO| |
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58 | |2x IDT 7202SA25J|FIFO| |
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59 | |3xCY7C199-45VC|RAM| |
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60 | |||
61 | * GAL image: attachment:bildtel001-aeg_olympia_codec_adsp_4012-001_2_GAL20V8A.jed |
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62 | |||
63 | h4. AEG-OLYMPIA OUTDIG |
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64 | |||
65 | PCB Marking: @2401913L1T@ |
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66 | Connector Marking: @35.103-3030.2 SN. 3051@ |
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67 | |||
68 | top PCBA: |
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69 | |||
70 | 14 | laforge | {{thumbnail(20231030_110051.jpg,size=400)}} |
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73 | 13 | laforge | |Brooktree Bt101|Triple 8-bit VIDEODAC| |
74 | |Xilinx XC2018-100|FPGA 100 CLBs, 1000 Gates| |
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75 | |S-Data SXO-300C 27.00000 MHz|Crystal Oscillator| |
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76 | |3x IDT 7201SA25J|FIFO| |
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80 | bottom PCBA: FIXME |
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81 | |||
82 | 10 | laforge | h3. TV Camera |
83 | 4 | laforge | |
84 | {{thumbnail(20231028_115010.jpg,size=400)}} |
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86 | 11 | laforge | h3. TV / BTX Unit |
87 | 4 | laforge | |
88 | {{thumbnail(20231028_114503.jpg,size=400)}} |
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89 | 7 | laforge | {{thumbnail(20231028_132851.jpg,size=400)}} |
90 | {{thumbnail(20231028_133058.jpg,size=400)}} |
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91 | {{thumbnail(20231028_133103.jpg,size=400)}} |
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92 | {{thumbnail(20231028_133211.jpg,size=400)}} |
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93 | {{thumbnail(20231028_133255.jpg,size=400)}} |
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94 | 1 | laforge | {{thumbnail(20231028_133336.jpg,size=400)}} |
95 | 11 | laforge | |
96 | h4. BTX decoder |
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97 | |||
98 | * EPROM image: attachment:bildtel001_tv10_btxdecoder_16772_074_349_27C010.bin |
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99 | 4 | laforge | |
100 | 10 | laforge | h3. Keyboard/receiver unit |
101 | 4 | laforge | |
102 | {{thumbnail(20231028_114558.jpg,size=400)}} |
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103 | {{thumbnail(20231028_114639.jpg,size=400)}} |
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107 | 5 | laforge | {{thumbnail(20231028_142246.jpg)}} |
108 | {{thumbnail(20231028_142251.jpg)}} |
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109 | 4 | laforge | |
110 | 9 | laforge | Actual Cherry keyboard PCBA after full disassembly, ultrasonic cleaning of all keycaps and lots of isopropanol on the PCB, removing what might be decades old coke residue: |
111 | {{thumbnail(20231029_093033.jpg,size=400)}} |
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113 | 12 | laforge | * EPROM image: attachment:bildtel001_keyboard_74E84.251U22g_1.0.0_010389_M2764A.bin |
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115 | 10 | laforge | h2. Connections |
116 | 1 | laforge | |
117 | 10 | laforge | h3. Codec unit |
118 | 1 | laforge | |
119 | * connects to ISDN basic-rate S0 interface using 8P8C/RJ45 plug |
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120 | * has two proprietary connectors for attaching video cameras |
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121 | * has two SCART connectors (one for audio/video output to the TV) |
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122 | * has a TAE jack for attaching an analog phone for the audio port (connected to the combined keyboard/receiver unit by default) |
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123 | * has another TAE jack (purpose unknown) |
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124 | * has a V.24 interface on a SUB-D 9 connector which connects to the built-in BTX decoder of the TV unit |
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125 | |||
126 | 10 | laforge | h3. TV Camera |
127 | 1 | laforge | |
128 | * connects to the Codec unit using a proprietary high-density connector that appears to carry both video and power |
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129 | |||
130 | 10 | laforge | h3. TV unit |
131 | 1 | laforge | |
132 | * has an RF input for TV broadcast signals (PAL) |
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133 | * has a SCART input for baseband audio/video from peripherals (like the Codec unit) |
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134 | * has a DIN speaker output for attaching an external speaker |
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135 | * has a built-in BTX decoder with |
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136 | ** an unused DIN port intended to connect to the [[DBT-03]] BTX-Modem (not used in the ISDN video application) |
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137 | ** an unused centronics port |
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138 | ** an auxiliary V.24 port on a DIN connector interfacing the SUB-D 9 of the Codec unit |
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139 | |||
140 | 10 | laforge | h3. Keyboard/receiver unit |
141 | 1 | laforge | |
142 | * has a cable with TAE connector attached (connects to codec unit) |
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143 | 9 | laforge | |
144 | h2. Further Reading |
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145 | |||
146 | * "Thread on the fediverse covering the BildTel 001":https://chaos.social/@LaF0rge/111317641831468838 |