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DATAMATH CALCULATOR MUSEUM |
Texas Instruments SR-56
Date of introduction: | May 21, 1976 | Display technology: | LED-stick |
New price: | $179.95, DM 598.00 | Display size: | 10 + 2 |
Size: | 5.8" x 3.2" x
1.3" 147 x 81 x 32 mm3 |
||
Weight: | 8.5 ounces, 240 grams | Serial No: | 59452 |
Batteries: | BP1A | Date of manufacture: | wk 49 year 1976 |
AC-Adapter: | AC9130A | Origin of manufacture: | Italy (RCI) |
Precision: | 12/13 | Integrated circuits: | TMC0501, TMC0537, TMC0538, TMC0599 |
Logic: | AOS - 7 Pending Operations, 9 () | Displays: | DIS234G |
Memories: | 10 | ||
Program steps: | 100 | Courtesy of: | Joerg Woerner |
Download leaflet: | ![]() ![]() |
Download manuals: | ![]() ![]() ![]() |
Texas
Instruments formally introduced the SR-56 Programmable Calculator on May 21st, 1976
to fill the gap in its Portfolio of Scientific and Programmable Calculators:
• SR-16-II:
Basic Scientific Calculator, Chain Logic • SR-50A: Scientific Calculator, Sum-of-Products Logic • SR-51A: Statistical Calculator, Sum-of-Products Logic • SR-56: Programmable Calculator, AOS • SR-52: High Programmable Calculator, AOS |
The SR-56 not only shares the design with the SR-50A and SR-51A, even its internal construction is identical and the three calculators differ only in the population of the printed circuit board (PCB) used with all three designs:
Calculator | Logic | Arithmetic Chip |
SCOM Chips |
Multi- Register Chip |
Price |
SR-50A (V2) | SOP | TMC0501 | TMC0531 | US$ 109.50 | |
SR-51A (V2) | SOP | TMC0501 | TMC0532 TMC0533 |
US$ 224.95 | |
SR-56 | AOS | TMC0501 | TMC0537 TMC0538 |
TMC0599 | US$ 179.95 |
The SR-50A and its sibling SR-51A were the result of a major redesign of the immaculate SR-50 design introduced already in January 1974 to reduce manufacturing costs but Texas Instruments hit during the redesign of the calculators a major roadblock with the TMC0530 Scanning Read-Only Memory (SCOM) Chip and introduced the first iteration of both the SR-50A and SR-51A with the TMC0520 SCOM Chips known from SR-50 and SR-51, respectively. When the SR-56 Programmable Calculator was finally launched with an Suggested Retail Price (SRP) of US$ 179.95, it was an immediate success and its price tag perfectly mirrored its capabilities compared to the SR-52:
Calculator | Program Steps |
Memories | External Memory |
Printer Compatibilty |
Price |
SR-52 | 224 | 20 | Integrated Card Reader |
PC-100, PC-100A |
US$ 395.00 |
SR-56 | 100 | 10 | not available | PC-100, PC-100A |
US$ 179.95 |
While the SR-56 Programmable works with both the PC-100 and PC-100A printer cradle, do the SR-50A (Version 2) and SR-51A (Version 2) not support an external printer.
Dismantling
the featured SR-56 calculator with Date code
4976 RCI and manufactured in December 1976 in
Rieti, Italy and comparing with an SR-50A (Version 1)
calculator manufactured six months earlier in Italy reveals some unexpected
changes. While the earlier calculator uses a SN97227 Clock Generator Chip in a
small 8-pin DIP (Dual In-line Package with a 0.1” / 2.54 mm lead pitch) housing
together with a TP4011A Clock Buffer Chip
in a 14-pin DIP housing to reduce both real estate on the PCB and manufacturing
costs compared to the original SR-50 introduced in January 1974, are these two
Integrated Circuits (ICs) gone. And no, they are not hiding under the small
power supply module on the right side of the PCB boosting the output of the
rechargeable
BP1A
Battery Pack to the required voltages of the calculator electronics.
The
secret sauce of the revised design is the new TMC0538 SCOM Chip replacing the
TMC0521 Chip of the original SR-50A
(Version 1) featuring an integrated Clock Generator for the TMC0501 Arithmetic
Chip and the TMC0599 Multi-Register Chip used with the SR-56.
Other
areas of the PCB didn't change that dramatically, we still identify the two SN27882
display drivers known from the previous designs of the calculator.
Comparing the PCBs of the three siblings
SR-50A
(Version 2), SR-51A (Version 2), and
SR-56 (in TI internal documents
often dubbed SR-51P for Programmable)
reveals some very subtle differences, too. Right below the power
supply module for the internal calculator voltages VDD (-10.0 Volts) and VGG (-15.8 Volts) you'll find a 50 and
a 51 marking.
Depending on the calculator model three configurations are populated:
• SR-50A: A 150 kOhm resistor
soldered into the left (50) position connects the CLK pin and VGG
of the TMC0531 to enable its internal clock generator and providing the
two non-overlapping clock signals with 180° phase difference and a frequency around 180 kHz to the TMC0501 Arithmetic Chip • SR-51A: A 150 kOhm resistor soldered into the right (51) position connects the CLK pin and VGG of the TMC0533 to enable its internal clock generator and providing the two non-overlapping clock signals with 180° phase difference and a frequency around 180 kHz to the TMC0501 Arithmetic Chip. The clock generator of the TMC0532 is disabled and it generates the D0 signal instead for possible PC-100 Printer Cradle compatibility • SR-56: A 30 kOhm soldered into the right (51) position connects the CLK pin and VGG of the TMC0538 to enable its internal clock generator, a 39 pF capacitor between the CLK pin and VSS greatly improves the stability of the clock frequency. The clock generator of the TMC0537 is disabled and it generates the D0 signal for PC-100 Printer Cradle compatibility |
In the lower-left area of the PCBs you'll notice a small symbol for a diode but only the SR-56 has actually a diode soldered into the position, both the SR-50A and SR-51A are using a piece of wire, instead. From a technical point of view the diode is necessary for operation of the calculator on a PC-100 Printer Cradle. While the Key input matrix line KP of the TMC0501 Arithmetic Chip is used in stand-alone calculator mode for various keys (D1, D2, D3, D4, D6, D7, and D13), doubles it in the PC-100 Printer Cradle application to signal three additional conditions or actions:
• D0: Presence detection of PC-100 Printer Cradle • D12: [PRINT] key detection • D15: [TRACE] switch detection |
The SR-56 uses a second set of diodes and current limiting resistors for the charging circuitry of its battery pack to accommodate for the increased power consumption of the calculator due to the TMC0599 Multi-Register Chip compared to the SR-51.
Last but not least features only the SR-56 gold-plated contacts for the PC-100 Printer Cradle.
As
of today we know two revisions of the consolidated PC used with the SR-50A
(Version 2), SR-51A (Version 2) and SR-56 but noticed only one minor change in
the "Clock Generator Patch Area". The unused wiring positions in the lower area
of the PCB were removed to free up some space for the slightly larger power
supply module. The picture on the right compares the relevant part of the PCB
from two SR-51A calculators manufactured in April 1976 and November 1976.
There are two different
external designs of the SR-56 known,
one with and one without the word "Programmable" under the SR-56 logo.
Comparing the internal design of the two SR-56 versions reveals no technical differences.
According
to Texas Instruments the SR-56 was introduced May 21st, 1976 which
corresponds to week
21 of the year. French collector Francis Martin was first reporting to the
Datamath Calculator Museum that he discovered two SR-56
calculators with manufacturing Date codes of LTA 1176 and LTA 1276, a whooping 9
resp. 10 weeks before the date of the "official" introduction. Dismantling the calculators
revealed Date codes of the two SCOM Chips of week 11, too for proof that the SR-56 were
produced
already in March and we assumed that Francis is the lucky owner of rare
"pre-production run". We consequently started a
Database with Serial Numbers and Date codes for
SR-56 calculators and invited our fellow calculator aficionados to report their
findings accordingly.
Next in line was Ken Kaplan reporting his SR-56 with Serial# 046479 and a production Date code LTA 0876 with SCOM Chips from week 5 before Lynn Shelley reported in March 2010 his SR-56 with Serial# 003594 and a production Date code 0476 DTA sporting SCOM Chips from weeks 02 and 03.
The discrepancy between SR-56 calculators manufactured as early as January 1976 and its "formal" introduction in May 1976 wasn't understood till we studied some notes from a former TI Quality Controls Engineer revealing that while the first member of the new TMC0530 SCOM Chip, the TMC0531 was up and running in March 1975 for a timely introduction of the SR-50A (Version 2), did the TMC0530 design not work properly and the rework of the Base Mask Design took more than 6 months. Texas Instruments consequently introduced an interims design for the SR-50A (Version 1) and SR-51A (Version 1) with the original TMC0520 SCOM Chips known from SR-50 and SR-51 and postponed the introduction of the SR-51P, later renamed to SR-56. Here at the Datamath Calculator Museum we label SR-56 calculators manufactured significantly before May 1976 as "SR-56 (Pre-Launch)" to study their differences (if any) to later SR-56 calculators.
Comparing the hardware of the SR-56 with its sibling SR-52, you'll notice some interesting differences:
Calculator | Program Steps |
Memories | SCOM Chips |
BROM Chips |
Multi- Register Chips |
SR-52 | 224 | 20 | 1 | 2 | 2 |
SR-56 | 100 | 10 | 2 | 0 | 1 |
While the SR-52 uses for its Instruction Memory a combination of one TMC0520 SCOM and two TMC0560 BROM Chips, is the SR-56 centered around two TMC0530 SCOM Chips. Utilizing two SCOM Chips obviously doubles the features provided by just one SCOM Chip as seen in the SR-50A or the SR-52 and we looked into the second SCOM Chip of the SR-56. According to the "Data Sheet" of the TMC0530, it provides four functionalities to calculators based on the TMS0500 Building Blocks:
• KEYBOARD AND DISPLAY SCANNING: 16 Digit Times Output D0 to D15 • INSTRUCTION MEMORY: Read-Only Memory (ROM) with 1,024*13 Bits for TMC0501/TMC0501E Arithmetic Chips • CONSTANT MEMORY: 16 Constants of up to 16 digits, each • DATA REGISTERS: 2 16-digit Data Registers for TMC0501/TMC0501E Arithmetic Chips |
The TMC0560 BROM (Bare Read-Only Memory Chip provides just one functionality:
• INSTRUCTION MEMORY: Read-Only Memory (ROM) with 1,024*13 Bits for TMC0501/TMC0501E Arithmetic Chips |
And the TMC0599 Multi-Register Chip provides RAM (Random Access Memory) storing 240 program steps or 30 numbers of 16 digits, each and accessible through a 4-bit bidirectional I/O bus:
• KEYCODE MEMORY: Up to 240 Program Steps for User Programs • DATA REGISTERS: Up to 30 16-digit Data Registers for TMC0501/TMC0501E Arithmetic Chips |
Taking the different AOS Implementations with the SR-52 storing up to 10 pending operations and the SR-56 storing up to 7 pending operations into account, we have a good understanding of the Memory Partitioning of the two calculators:
SR-52:
• 3,096*13 Bits Instruction Memory in TMC0524, TMC0562 and TMC0563 • 224*8 Bits Keycode Memory in one TMC0599, leaving 2 Data Register available • 20 16-digit Data Registers in the second TMC0599, leaving 10 Data Register available • 2 16-digit Data Registers in TMC0524 |
SR-56:
• 2,048*13 Bits Instruction Memory in TMC0537 and TMC0538 • 100*8 Bits Keycode Memory in TMC0599, leaving 17 Data Register available • 10 16-digit Data Registers in TMC0599, leaving 7 Data Register available • 4 16-digit Data Registers in TMC0537 and TMC0538 |
The SR-52 uses up all but 14 and and the SR-56 all but 11 of their 16-digit Data Registers, exactly the difference in their AOS Implementations. None of the precious RAM left unused, leaving the final question about the extra Constant Memory available with the second TMC0538 used with the SR-56.
Comparing
the Constant ROM Content with
the programmed constants frequently used with computing algorithm of
trigonometric functions like sine, cosine, or tangent of an SR-52 manufactured in
April 1976 using the TMC0524 SCOM Chip with the TMC0537 SCOM Chip
of the featured SR-56 with our
TMS0500 Platform after recording their
ROM Images showed as
expected no
differences. When we were looking into the constants programmed into the second
SCOM Chip of an SR-51A (TMC0523A-5), we located as
expected values like 2.54 (inches to centimeters), 0.3048 (feet to meters) and
0.9144 (yard to meters) used with its "Conversion Keys". But the SR-56 dropped
these "Conversion Keys" in lieu of its blue "Special Function Keys".
We
experienced a much bigger surprise when we
were analyzing the Constant ROM Content of the TMC0538NL A7644 Chip and
discovered Key Codes for these
"Special Functions" of the SR-56 instead the Constants for the "Conversion Keys"
of the SR-51A.
Analyzing the six programs totaling 127 program steps, we
identified the routines for Polar/Rectangular Conversions [P→R], [R→P], Mean and
Standard Deviation Calculation [Mean], [S.Dev.] and Data Entry [∑+], [∑−].
Texas
Instruments introduced on May 24, 1977 the famous calculator trio TI-57,
TI-58 and TI-59 replacing both
the SR-52 and SR-56. German collector Stephan Feinen discovered recently a SR-56
with a production code of 2477 ACH - weeks after the introduction of the
successors!
Don't miss a SR-56 manufactured in Brazil.
Fellow collectors - if you own a SR-56 please report us the serial number and date code on the back of the calculator for our SR-56 Database.
Serial Number | Origin | Date code | Logo | Owner |
001202 | USA | ??? ??76 | Enzo Messina | |
002030 | USA | ??? ??76 | Dave Laffitte | |
003594 | USA |
DTA 0476 |
Lynn Shelley | |
004257 | USA | DTA 0476 | Scott Reynolds | |
004398 | USA | DTA 0476 | Richard Berry | |
004403 | USA | DTA 0476 | Joerg Woerner | |
004496 | USA | DTA 0476 | Kirk B. Muri | |
006042 | USA | LTA 0676 | Bill Kabelac | |
006468 | USA | LTA 0676 | Bill Elliott | |
006902 | USA | LTA 0676 | John Reichmann | |
007097 | USA | LTA 0676 | Dr. Kevin Easley | |
007951 | USA | LTA 0876 | Miroslav Krob | |
010946 | USA | LTA 1276 | Paul Dadd | |
012794 | USA | LTA 0876 | Luciano Bonfigli | |
012978 | USA | LTA 0876 | Roberto Paoletti | |
014595 | USA | LTA 1276 | Michael Klevickis | |
018693 | USA | LTA 1276 | Gene Wright | |
019040 | USA | LTA 1276 | Carlos | |
019242 | USA | LTA 1276 | Martin Ndzelen | |
021968 | USA | LTA 1276 | Ivar Magnusson | |
026894 | USA | LTA 2476 | Jayantilal M Patel | |
028275 | USA | LTA 0876 | Joerg Woerner | |
028398 | USA | LTA 0876 | Marie Lisa Collas | |
028531 | USA | LTA 0876 | Coy Lam | |
028985 | USA | LTA 0876 | Michael Mehlhorn | |
029118 | USA | LTA 0876 | Osman Karaokcu | |
029747 | USA | LTA 0876 | Marc-Eric Amstutz | |
029990 | USA | LTA 0876 | Joerg Woerner | |
030952 | USA | LTA 4176 | Bill Hastings | |
032022 | USA | LTA 0677 | Skye Le | |
032431 | USA | LTA 4176 | Kirk B. Muri | |
032705 | USA | LTA 4176 | Palmer Hanson | |
035900 | USA | LTA 4176 | Pat_man_pdo | |
037453 | USA | LTA 3876 | James Doig | |
038477 | USA | LTA 1176 | John M. | |
042489 | USA | LTA 0876 | François Jacques | |
044120 | USA | LTA 0876 | Giovanni Legnani | |
044311 | USA | LTA 0876 | Kurt Pribil | |
044749 | USA | LTA 1176 | Joăo Carlos do Rosário | |
045602 | USA | LTA 1176 | Mike Parsons | |
046199 | USA | LTA 0876 | Computer History Museum | |
046479 | USA | LTA 0876 | Ken Kaplan | |
046644 | USA | LTA 0876 | Clark Casale | |
048109 | USA | LTA 2076 | Ken H. Meine | |
051730 | USA | LTA 2076 | Ben Davis | |
053142 | USA | LTA 3076 | Joerg Woerner | |
055273 | USA | LTA 3076 | Wolfgang Kemper | |
055673 | USA | LTA 3076 | Maite Urrutia | |
056731 | USA | LTA 2076 | Jack Crafchick | |
056955 | USA | LTA 2076 | Gabriel Baum | |
058184 | USA | LTA 4176 | Gene Wright | |
060538 | USA | LTA 1276 | R.J. Legman | |
060685 | USA | LTA 1276 | John Versluys | |
061649 | USA | LTA 1276 | Ray Foulkrod | |
062625 | USA | LTA 1276 | Joerg Woerner | |
065865 | USA | LTA 1276 | George Nix | |
066174 | USA | LTA 1276 | Kirk B. Muri | |
066311 | USA | LTA 1276 | Hans-Peter Bieger | |
067219 | USA | LTA 4176 | Al Paslow | |
069417 | USA | LTA 3276 | Joerg Woerner | |
072261 | USA | LTA 3276 | Kirk B. Muri | |
077980 | USA | LTA 4076 | Gene Wright | |
079905 | USA | LTA 2476 | Jack Crafchick | |
080968 | USA | LTA 3076 | Alain Gressier | |
083257 | USA | LTA 3076 | Leo Wilkie | |
083301 | USA | LTA 3076 | Joerg Woerner | |
088033 | USA | LTA 3076 | Claus Buchholz | |
088661 | USA | LTA 3076 | Dave | |
090418 | USA | LTA 3776 | Walter Roberson | |
093896 | USA | LTA 3776 | Edward Boyles | |
094013 | USA | LTA 3176 | Hugh Wilkinson | |
094606 | USA | LTA 3176 | BillPeacher | |
095464 | USA | LTA 3276 | Kirk B. Muri | |
095984 | USA | LTA 3276 | Randall Scheuerman | |
096720 | USA | LTA 3676 | Kirk B. Muri | |
098184 | USA | LTA 3676 | Glen Petersen | |
098537 | USA | LTA 3676 | Computer History Museum | |
102519 | USA | LTA 3776 | Programmable | Bob Tessier |
103322 | USA | LTA 3976 | Gene Wright | |
103493 | USA | LTA 3976 | Lenny Tosto | |
103998 | USA | LTA 3976 | David Balcaen | |
108461 | USA | LTA 3176 | Stephanie Huang | |
109527 | USA | LTA 3276 | Jim Murphy | |
110674 | USA | LTA 3276 | Gene Wright | |
112881 | USA | LTA 3576 | Guenther Engelhart | |
113960 | USA | LTA 3576 | Michael Young | |
114101 | USA | LTA 3576 | Michael Shackelford | |
118534 | USA | LTA 3676 | Paul Kowalski | |
118713 | USA | LTA 3676 | Joerg Woerner | |
118822 | USA | LTA 3676 | Gavin Wickham | |
121400 | USA | LTA 3276 | Programmable | Joerg Woerner |
123276 | USA | LTA 4676 | Ernest Orr | |
123480 | USA | LTA 4676 | Joy Eberhardt | |
123831 | USA | LTA 3176 | Mark Sherman | |
130278 | USA | LTA 5176 | Ken H. Meine | |
130956 | USA | LTA 5176 | Henry Gleizer | |
131439 | USA | LTA 5176 | Marie Lisa Collas | |
131819 | USA | LTA 5176 | Al Paslow | |
132929 | USA | LTA 4976 | Vasiliy Tolstoy | |
134128 | USA | LTA 4976 | Mario Cusenza | |
135621 | USA | LTA 0477 | Javier Juncadella | |
137931 | USA | LTA 4776 | Programmable | Miroslav Krob |
______ | USA | LTA 0577 | Programmable | Joerg Woerner |
145936 | USA | LTA 4876 | Victor Rollinger | |
146169 | USA | LTA 4876 | n.a. | |
146241 | USA | LTA 4976 | Joerg Woerner | |
146278 | USA | LTA 4976 | Miroslav Krob | |
146512 | USA | LTA 4976 | Uwe Stöcks | |
146619 | USA | LTA 4976 | D. van der Neut | |
151773 | USA | LTA 0877 | Programmable | Kirk B. Muri |
152051 | USA | LTA 0877 | Programmable | Joerg Woerner |
154031 | USA | LTA 4576 | S.Plavinski | |
154601 | USA | LTA 4676 | Erik Polk | |
154605 | USA | LTA 4676 | Roger Ogé | |
154880 | USA | LTA 4676 | Programmable | John Lambert |
155114 | USA | LTA 4676 | Marko Sokolich | |
156054 | USA | LTA 4876 | Brian White | |
163274 | USA | LTA 0277 | Programmable | Jack Hummingbird |
163654 | USA | LTA 0377 | Programmable | Klaus Boehm |
164416 | USA | LTA 0277 | Programmable | Ken H. Meine |
165141 | USA | LTA 0277 | Programmable | Gene Wright |
166016 | USA | LTA 0277 | Programmable | Don |
167288 | USA | LTA 0377 | Programmable | Eric Schwarz |
169517 | USA | LTA 0577 | Programmable | Dr Steve Weddell |
170452 | USA | LTA 0577 | Programmable | Joerg Woerner |
172394 | USA | LTA 5176 | Kirk B. Muri | |
173341 | USA | LTA 5176 | Dr. Gar Won Ko | |
173990 | USA | LTA 5176 | Jake Gowans | |
176799 | USA | LTA 0677 | Enrique Garcia Ortiz | |
177154 | USA | LTA 0677 | David Ribera | |
177390 | USA | LTA 0677 | Zbynek Hak | |
177787 | USA | LTA 0677 | Thomas Kapper | |
182052 | USA | LTA 0677 | Programmable | Greg Kulp |
182131 | USA | LTA 0677 | Programmable | William Ramsey |
182550 | USA | LTA 0677 | Programmable | Sid Ellis |
183757 | USA | LTA 0377 | Programmable | Kirk B. Muri |
185822 | USA | LTA 0477 | Programmable | Joerg Woerner |
188872 | USA | LTA 0477 | Programmable | Joerg Woerner |
190055 | USA | LTA 0277 | Joerg Woerner | |
190576 | USA | LTA 0477 | Programmable | Joerg Woerner |
191052 | USA | LTA 0477 | Programmable | Dr. Jürgen Rodenkirchen |
191156 | USA | LTA 0477 | Lynda Charles Shelton | |
191372 | USA | LTA 0477 | bennyboy6 | |
193158 | USA | LTA 0477 | Mark E. Berger | |
2497970 | USA | LTA 1577 | John Jones | |
2498363 | USA | LTA 1577 | Programmable | Harry Shaw |
2499159 | USA | LTA 1677 | José López | |
3101291 | USA | LTA 1077 | Bruce Kernes | |
051742 | Brazil | 5076 CIB | Joerg Woerner | |
054273 | Brazil | 1877 CIB | André Luis Trentin | |
054399 | Brazil | 2177 CIB | Roberlei Gentil Toniete | |
055816 | Brazil | ____ CIB | Romildo P. Módolo | |
9100962 | Netherlands | 1676 ACH | Jaroslav Malec | |
9101370 | Netherlands | 1676 ACH | Erich Schikuta | |
9102216 | Netherlands | xxxx ACH | Luis Ametrans | |
9102853 | Netherlands | 1676 ACH | Alex Guerrazzi | |
9103424 | Netherlands | 1476 ACH | Gilbert Leray | |
9103776 | Netherlands | 1476 ACH | Tihomir Santek | |
9103817 | Netherlands | 1476 ACH | Matthias Hofer | |
9105502 | Netherlands | 3976 ACH | Karol Orlowski | |
9106757 | Netherlands | 1177 ACH | Maciej Wirkus | |
9107471 | Netherlands | 1976 ACH | Henrique Martins | |
9107752 | Netherlands | 0577 ACH | John Warman | |
9108417 | Netherlands | 2376 ACH | Rudolf Lovnički | |
9108764 | Netherlands | 2276 ACH | Juan Jose Romera | |
9108918 | Netherlands | 2376 ACH | Leen Boers | |
9108935 | Netherlands | 2376 ACH | Jeroen Gietema | |
9109964 | Netherlands | 1876 ACH | José Levon | |
9110392 | Netherlands | 2376 ACH | Rafael Sevilla | |
9111014 | Netherlands | 2276 ACH | Leo van Hoeken | |
9111387 | Netherlands | 2376 ACH | Josef Bém | |
9113462 | Netherlands | 2376 ACH | Erik Remander | |
9114429 | Netherlands | 2476 ACH | John Fletcher | |
9114697 | Netherlands | 2276 ACH | Gordon Johnston | |
9115309 | Netherlands | 2476 ACH | Bob Worsley | |
9116613 | Netherlands | 4776 ACH | Doug | |
9116904 | Netherlands | 4876 ACH | Rudi Verdoodt | |
9117455 | Netherlands | 4876 ACH | Joerg Woerner | |
9119154 | Netherlands | 4376 ACH | Lars Olejnik | |
9119233 | Netherlands | 4376 ACH | Sture Bloom | |
9119742 | Netherlands | 4376 ACH | Joerg Woerner | |
9120647 | Netherlands | 4876 ACH | Joerg Woerner | |
9121717 | Netherlands | 3477 ACH | Pierre Morisset | |
9121832 | Netherlands | 0377 ACH | Richard Kaye | |
9122526 | Netherlands | 5276 ACH | Joăo Carlos do Rosário | |
9122910 | Netherlands | 0177 ACH | Stuart of Blyth | |
9123166 | Netherlands | 4876 ACH | Thomas Ritschel | |
9126020 | Netherlands | 3477 ACH | Joerg Woerner | |
9126481 | Netherlands | 0477 ACH | Paul Hofbauer | |
9127791 | Netherlands | 0277 ACH | Giovanni Bellini | |
9______ | Netherlands | 1277 ACH | Hans Larson | |
9______ | Netherlands | 1377 ACH | Marie Lisa Collas | |
9______ | Netherlands | 1777 ACH | Erich A. Gindl | |
9______ | Netherlands | 1977 ACH | Kurt Pribil | |
9______ | Netherlands | 2377 ACH | Allan W B Stalker | |
9______ | Netherlands | 2477 ACH | André Wilhelmus | |
9136908 | Netherlands | 1977 ACH | Owen Savill | |
9138504 | Netherlands | 2477 ACH | Michael Behnsen | |
9143748 | Netherlands | 1877 ACH | Zbynek Hak | |
9145454 | Netherlands | 1877 ACH | Thomas Gill | |
9147826 | Netherlands | 2277 ACH | Tom Pereira | |
91486xx | Netherlands | 1277 ACH | Miroslav Krob | |
9153225 | Netherlands | 1377 ACH | Aron Barman | |
9154050 | Netherlands | 1577 ACH | Hans Osmers | |
9154314 | Netherlands | 1577 ACH | Tiny Henst | |
9154587 | Netherlands | 1577 ACH | John Dale | |
9159914 | Netherlands | 1277 ACH | Thomas Gill | |
9______ | Netherlands | 2177 ACH | Marie Lisa Collas | |
9______ | Netherlands | 2477 ACH | Stephan Feinen | |
9______ | Netherlands | 2477 ACH | Marc van Lemmen | |
9______ | Netherlands | 2477 ACH | Christoph Kraft | |
9194747 | Netherlands | 2477 ACH | Ignacio Sánchez Reig | |
07287 | Italy | 1377 RCI | Joăo Ferreira do Rosário | |
10693 | Italy | 3876 RCI | Erik Waelchli | |
12140 | Italy | 3876 RCI | Thomas Fänge | |
13035 | Italy | 3276 RCI | Marcus von Cube | |
13062 | Italy | 3276 RCI | Lars Herold | |
13525 | Italy | 3276 RCI | Dieter Teuchert | |
13757 | Italy | 3276 RCI | Joerg Woerner | |
A12385 | Italy | 3176 RCI | Stephan van Radecke | |
A14708 | Italy | 3276 RCI | Leonardo Galeone | |
A15103 | Italy | 3676 RCI | Thorsten Gruschke | |
16420 | Italy | 4076 RCI | "Quelvin" | |
A16658 | Italy | ____ RCI | Tsjip de Leeuwentemmer | |
A17711 | Italy | 3276 RCI | Marie Lsia Collas | |
18150 | Italy | 4276 RCI | Zbynek Hak | |
19477 | Italy | 4076 RCI | Joerg Woerner | |
19818 | Italy | 4276 RCI | M. Door | |
19934 | Italy | 4276 RCI | isidoro | |
20485 | Italy | 1377 RCI | Tibor Cinkler | |
21480 | Italy | 4076 RCI | Monkey Nut | |
21502 | Italy | 4176 RCI | Bruno Studer | |
_____ | Italy | 4276 RCI | Varga Balázs | |
34793 | Italy | 4876 RCI | Enrico Vidale | |
34860 | Italy | 4976 RCI | Maximilian Hauser | |
35794 | Italy | 4976 RCI | Audun Mathisen | |
50861 | Italy | 4976 RCI | Iztok Robic | |
51377 | Italy | 4176 RCI | Miroslav Krob | |
51733 | Italy | 4976 RCI | Francis Massen | |
51717 | Italy | 4976 RCI | Michel Lahcem | |
51847 | Italy | 4976 RCI | Peter Engels | |
53206 | Italy | 4976 RCI | Dina Marian | |
53938 | Italy | 4976 RCI | Joerg Woerner | |
54020 | Italy | 4976 RCI | Joerg Woerner | |
54135 | Italy | 4976 RCI | Thomas Kapper | |
55196 | Italy | 4976 RCI | Marie Lisa Collas | |
55438 | Italy | 4976 RCI | Fedele Decandia | |
55527 | Italy | 4976 RCI | Jřrn Skoven Pedersen | 57237 | Italy | 4976 RCI | Pierre Houbert | 57913 | Italy | 4976 RCI | Bastian Schmelzer |
59452 | Italy | 4976 RCI | Joerg Woerner | |
59728 | Italy | 4976 RCI | Ian Stirling | |
60300 | Italy | 4976 RCI | Juri Schauder | |
16949 | Italy | 0577 RCI | Programmable | John Dale |
20944 | Italy | 0577 RCI | Programmable | Christoph Oertli |
22102 | Italy | 1277 RCI | Programmable | Angelo Elifani |
30142 | Italy | 0577 RCI | Programmable | Paul Debono |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.