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LOEWE ALPHA-2

loewe_alpha2_pcb_stack.jpg loewe_alpha2_pcb_schachtel.jpg loewe_alpha2_floppies.jpg

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

Hardware

Mainboard

loewe_alpha2_main_top.jpg loewe_alpha2_main_bot.jpg

TWM

loewe_alpha2_twm_top.jpg loewe_alpha2_twm_bot.jpg

3rd party Photos

see https://flickr.com/photos/klausnahr/albums/72157713085808526

EPROM images

LOEWE_ALPHA2_TMS27C512.bin

LOEWE_TWM01_TELEFON_WAHLMODUL_D8751H.bin

Manual

loewe-pc-btx-alpha-handbuch.pdf

Updated by laforge 4 months ago · 4 revisions

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