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Tech Notes: Wang 200/300-Series Electronic Package LogiBloc Directory


This doument outlines the various Wang LogiBlocs (Wang's trade name for their modular circuit board logic modules) that make up each of the Wang 200 and 300-series calculator electronics packages. The listing contains the LogiBloc identification number (always found in a couple of locations etched on the circuit board), the general function of the board, and columns indicating if the board is used within the various model calculators in the line. An "X" indicates that one of the boards is used in the model. A "-" indicates that the board is not used in the model. A digit indicates how many of the board are used in the model.

The 300E, 310E, and 320E electronics packages are all identical electronically. The only difference is the model number, and the default keyboard/display unit sold to make a calculator system. The keyboard sold with the electronics package determines the model number of the electronics package. This was a marketing ploy to allow a single version of the electronics package to be sold along with three different keyboard units (300K, 310K, or 320K) at different prices, with the only manufacturing price differential being the price of the additional switches, keycaps, and keyboard bezel of the keyboard/display unit.

The 210SE and 250SE calculators essentially duplicates of the 320SE and 360SE respectively, with backplane modifications to allow an additional 1/2-sized LogiBloc (2224) that provides an automatic currency round-off feature, making these machines more suitable for financial applications.

Schematics are available for some LogiBlocs. Board numbers that have a link can be clicked on to open a PDF image of the schematic for the board. You will need Adobe Acrobat Reader (available for free download from Adobe's website) to view the schematic. Use the "Zoom" function of Acrobat Reader to view details of the schematic.


Board
Number Function 210SE 250SE 300E 310E 320E 320SE 360E 360SE 362E
501 Logarithm Generator Constant ROM I X X X X X X X X X
502 Logarithm Generator Constant ROM II X X X X X X X X X
503 Logarithm Generator Constant ROM III X X X X X X X X X
504 B (Major Cycle) State 0/1 Gating - - X X X - X - X
505 B (Major Cycle) State 1/2 Gating X X X X X X X X X
506 B (Major Cycle) State 3/4/5 Gating - - X X X - X - X
507 B (Major Cycle) State 6/9 Gating - - X X X - X - X
508 B (Major Cycle) State 7/8/10 Gating - - X X X - X - X
509 8x8x4 Core Memory w/Inh. Drivers & Sense Amps - - X X X - - - -
510 8 Line Core X/Y Driver 4 - 2 2 2 4 2 - 4
511 Data Switching & Buffers X X X X X X X X X
512 4-Bit Parallel BCD Adder X X X X X X X X X
513 G Register, Core Memory Current Source - - X X X - X - X
514 Keyboard Latch & Decoder - - X X X - X - X
515 T Counter (Minor Cycle) & Decoding - - X X X - X - X
516 B Counter (Major Cycle) & Decoding - - X X X - X - X
517 R Counter (Minor Cycle) & Decoding - - X X X - X - X
518 B Switch X X X X X X X X X
519 Clock & Master Timing - - X X X - X - X
520 System State Flip Flops and Logic X X X X X X X X X
521 Keyboard Interface I, Simultaneous Units 2 2 - - - 2 - 2 -
522 Keyboard Interface II, Simultaneous Units 4 4 - - - 4 - 4 -
523 B (Major Cycle) State 0/1 Gating, Simultaneous Units X X - - - X - X -
524 B (Major Cycle) State 3/4/5 Gating, Simultaneous Units X X - - - X - X -
525 B (Major Cycle) State 6/9 Gating, Simultaneous Units X X - - - X - X -
526 B (Major Cycle) State 7/8/10 Gating, Simultaneous Units X X - - - X - X -
527A 8x16x4 Core Memory w/Inh. Drivers & Sense Amps - - - - - - X - -
528 Data Switching & Buffers, Simultaneous Units X X - - - X - X -
529 G Register, Core Memory Current Source, Simultaneous Units X X - - - X - X -
530 K State Decoder X X - - - X - X -
531 T Counter (Minor Cycle) & Decoding, Simultaneous Units X X - - - X - X -
532 B State Decoder X X - - - X - X -
533 R Counter (Minor Cycle) & Decoding, Simultaneous Units X X - - - X - X -
534 B Switch, Simultaneous Units X X - - - X - X -
535 Clock & Master Timing, Simultaneous Units X X - - - X - X -
536 Condition Memory Control, Simultaneous Units X X - - - X - X -
537 Scanner & X/Y Inverters, Simultaneous Units X X - - - X - X -
538 Control & Display Counters, Simultaneous Units X X - - - X - X -
539 Display Position Scanner, Simultaneous Units X X - - - X - X -
540 Memory Register Control - - - - - - X - -
541 16x16x4 Core Memory w/Inh. Drivers & Sense Amps X - - - - X - - X
F513 Model 362E System Control I - - - - - - - - X
F514 Model 362E System Control II - - - - - - - - X
F515 Model 362E System Control III - - - - - - - - X
F544 8 Line X/Y Core Driver, Source Side - X - - - - - X -
F545 8-Line X/Y Core Driver, Sink Side - X - - - - - X -
F546 System Control I - X - - - - - X -
F547 16x32x4 Core Memory Array - X - - - - - X -
F548 4 Line Core Sense Amplifiers, 4 Line Core Inhibit Drivers, System Control II - X - - - - - X -
2224 Half-Cent Roundoff Circuit X X - - - - - - -
N/A Power Supply X X - - - X - X -