LOEWE ALPHA-2 » History » Version 4
laforge, 10/06/2022 12:44 PM
| 1 | 1 | laforge | h1. LOEWE ALPHA-2 |
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| 3 | 4 | laforge | {{thumbnail(loewe_alpha2_pcb_stack.jpg,size=500)}} |
| 4 | {{thumbnail(loewe_alpha2_pcb_schachtel.jpg,size=500)}} |
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| 5 | {{thumbnail(loewe_alpha2_floppies.jpg,size=500)}} |
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| 7 | 1 | laforge | The LOEWE ALPHA-2 is a BTX Decoder card (full-length 8-bit ISA) for use in IBM or comptabile PCs. It appears to date to 1988. |
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| 9 | 2 | laforge | Contrary to the later common Software BTX decoders, the ALPHA-2 is a hardware decoder, utilizing the "ITT LOTTI" decoder ASIC. |
| 10 | 1 | laforge | |
| 11 | It supports three different modes of operation: |
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| 12 | * _CEPT-1_ where the decoded CEPT video signal is inserted/looped into the video signal of the PC graphics card, i.e. the ALPHA-2 is situated between CGA/MGA card and the (single) Monitor |
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| 13 | * _CEPT-2_ where the decoded CEPT video signal is displayed on a second monitor, independent from the primary monitor of the PC |
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| 14 | * _ASCII_ where the decoded CEPT is converted/reduced to normal ASCII characters which can be shown on the normal PC screen using its regular text display |
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| 16 | h2. Hardware |
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| 18 | 4 | laforge | h3. Mainboard |
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| 20 | {{thumbnail(loewe_alpha2_main_top.jpg,size=500)}} |
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| 21 | {{thumbnail(loewe_alpha2_main_bot.jpg,size=500)}} |
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| 23 | h3. TWM |
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| 25 | {{thumbnail(loewe_alpha2_twm_top.jpg,size=300)}} |
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| 26 | {{thumbnail(loewe_alpha2_twm_bot.jpg,size=300)}} |
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| 28 | h3. 3rd party Photos |
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| 29 | 3 | laforge | |
| 30 | see https://flickr.com/photos/klausnahr/albums/72157713085808526 |
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| 32 | 1 | laforge | h3. EPROM images |
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| 34 | attachment:LOEWE_ALPHA2_TMS27C512.bin |
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| 36 | attachment:LOEWE_TWM01_TELEFON_WAHLMODUL_D8751H.bin |
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| 38 | h2. Manual |
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| 40 | attachment:loewe-pc-btx-alpha-handbuch.pdf |
