LOEWE ALPHA-2 » History » Revision 3
Revision 2 (laforge, 10/05/2022 04:04 PM) → Revision 3/4 (laforge, 10/05/2022 04:05 PM)
h1. LOEWE ALPHA-2
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.
Contrary to the later common Software BTX decoders, the ALPHA-2 is a hardware decoder, utilizing the "ITT LOTTI" decoder ASIC.
It supports three different modes of operation:
* _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
* _CEPT-2_ where the decoded CEPT video signal is displayed on a second monitor, independent from the primary monitor of the PC
* _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
h2. Hardware
h3. Photos
see https://flickr.com/photos/klausnahr/albums/72157713085808526
h3. EPROM images
attachment:LOEWE_ALPHA2_TMS27C512.bin
attachment:LOEWE_TWM01_TELEFON_WAHLMODUL_D8751H.bin
h2. Manual
attachment:loewe-pc-btx-alpha-handbuch.pdf
