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

Hardware¶

Mainboard¶

TWM¶

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