DATAMATH CALCULATOR MUSEUM

Texas Instruments Lesefreund

Date of introduction:	1988	Display technology:	n.a.
New price:		Display size:
Size:	12.0" x 21.5" x 1.7"
Weight:	2 pounds 13 ounces	Serial No:
Batteries:	4*AA cells	Date of manufacture:	wk 31 year 1990
AC-Adapter:		Origin of manufacture:	USA
Precision:		Integrated circuits:	TSP50C42 (CSM42025), TSP60C19 (CMM19018), TSP60C19 (CMM19028)
Memories:
Program steps:		Courtesy of:	Joerg Woerner
		Download manuals:	(DE: 7.4M Bytes) (DE: 2.2M Bytes)

Nothing else than the German edition of the Super Speak & Read and the Ready...Set...Read! game.

The picture on the left side displays the game in the closed state. Find a picture of the opened toy here.

Dismantling a Lesefreund manufactured in July 1990 by Texas Instruments in the United States reveals a very efficient internal construction centered around a TSP50C4X Speech Synthesizer and supported with two TSP60C19 Speech-ROMs compared to the TSP60C80 located in the original Ready...Set...Read!.

We located on the double-sided printed circuit board (PCB) three Integrated Circuits:

• TSP50C42/CSM42025: TSP50C50 VSP (Voice Synthesis Processor) with 8-bit microcontroller and 8k Bytes Mask ROM for both program and voice and 128 Bytes + 16 Nibbles RAM
• TSP60C19/CMM19018: VSM (Voice Synthesis Memory) with 256k Bits
• TSP60C19/CMM19028: VSM (Voice Synthesis Memory) with 256k Bits

The Lesefreund is featured in the Texas Instruments Deutschland GmbH leaflet Spielen macht schlau dated 1991.

If you have additions to the above article please email: joerg@datamath.org.