DATAMATH CALCULATOR MUSEUM
Texas Instruments PC-324 Printer
|Date of introduction:||1986||Display technology:|
|New price:||$115.00 (SRP 1988)||Display size:|
|Size:|| 3.6" x 8.0" x
92 x 204 x 31 mm3
|Printer technology:||Thermal TP-324|
|Weight:||11.1 ounces, 314 grams||Serial No:||0045269|
|Batteries:||4*AA||Date of manufacture:||mth 38 year 1989|
|AC-Adapter:||AC9201||Origin of manufacture:||USA (LTA)|
|Precision:||Integrated circuits:||CPU: TMC70016|
|Program steps:||Courtesy of:||Joerg Woerner|
(US: 2.6M Bytes)
(EU: 8.4M Bytes)
Instruments introduced in 1986 with the TI-74 BASICALC
the successor of the Compact Computer System CC-40 and
used the platform for the TI-95 PROCALC, a very powerful
The battery operated, 24-column thermal printer PC-324 connects with the Dock-Bus to both the TI-74, it's OEM version TI-74S and the TI-95.
Dismantling this PC-324 manufactured in September 1989 by Texas Instruments in their Lubbock, Texas facility, reveals a clean design centered with just two main components:
CPU (Central processing Unit): The Texas Instruments TMC70016 microcomputer is a member of the TMS7000 family manufactured in CMOS technology. The original design of the TMS7000 series was introduced in 1981 as an 8-bit extension of the TMS1000 Family to compete with the Intel i8051, Motorola M6801, and Zilog Z8 parts. The first chips sported 128 Bytes of on-chip RAM (Random Access Memory) and either 2k Bytes or 4k Bytes of ROM (Read Only Memory). Later versions, e.g. the TMS70C46 used with this PC-324 printer, integrate 128 bytes of RAM, 4k Bytes of ROM and add some features like wake-up on key press and the Dock-Bus interface to the TMS70C40.
Printer Driver: The PC-324 makes use of a Sanyo LB1256, combining 7 high-current, low-saturation output drivers for the thermal elements of the print head and a motor driver for the printer mechanism.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.