NCR NCR 5972 manual Diagnostics, Micro-controller Test, External Memory Test Character VFD Only

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Chapter 3: Installation

3-5

Diagnostics

The 5972 Customer Display has internal Power Up Diagnostics that occur soon after power‐up or if a Reset Display command is received from the host software.

When the hardware is powered down, all registers and memory are lost. No recovery is possible.

The Power Up Diagnostics include the following tests:

•Micro‐controller test

•External character PROM test (VFD only)

•Pixel Number Display

Micro-controller Test

For serial communications, the CTS line is set in a Marking condition (negative voltage) at the start of the test. For VFD parallel communications, the Busy line is set active at the start of the test. The first test is the Micro‐controller test which checks operation at the Micro‐controller.

If an error is discovered, testing halts, and the firmware begins executing a forever do nothing loop. No response is sent to the host. If the Micro‐controller Test passes, the CTS and Busy line exception conditions are lifted.

External Memory Test Character (VFD Only)

A separate test is performed on the external character PROM, if it exists. The PROM status is noted and saved for terminal retrieval later using the Reset command.

If an error is discovered, all character sets stored in the PROM are considered invalid, and any command received attempting to switch to one of these character sets is treated as an invalid command and ignored.

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Contents Userʹs Guide Page Preface Safety RequirementsIntroduction Table of Contents Programming Set Up InstallationService Revision Record Federal Communications Commission FCC Radio Frequency Interference StatementsCanadian Department of Communications Voluntary Control Council For Interference VcciIntroduction VFD Models FeaturesModels Software LCD Models Introduction Working Range Physical EnvironmentTransit Environment Storage EnvironmentVFD Models DimensionsInch Post 119 mm 356 mm 14.1 95 mm 3.75 LCD Models Operational Environment Electrical Environment2x20 Customer Display Parallel Cable VFD Mounting Hole Dimensions2x20 Customer Display Serial Cable LCD Site Preparation Selv Power Source Warning Installing the Customer DisplayCable Requirements Installation GoalInstallation Procedures Power Supply ChoicesRS-232 Serial Interface External Memory Test Character VFD Only DiagnosticsMicro-controller Test Firmware Part Number Display Pixel TestHost/Retail Display Command Interface Programming Set UpRetail Display Commands Command Function Format 1B Returns xx yy zz Reset DisplayFormat 1B Set Diagnostic State OnErase Display Set Display State On Set Low Power State OnDisable Cursor Enable CursorFormat 1B 0A Set Screen Save BlankSet Screen Save Walk Turn On Screen Save Disable Screen Save OptionEnable Character Blink Move Cursor Left Disable Character BlinkMove Cursor Right Format 1B 0EMove Cursor Down Move Cursor UpFormat 1B 13 nn Move Cursor To Specified PositionRead Display ID Byte Brightness AdjustmentFormat 1B 17 nn Range 01 ≤ nn ≤ Format 1B Returns 0x8ASelect Character Set n Read Display ID StringDisplay ESC Character Code Page 850 International Character Sets014 Programming Set Up 056 077 078 079 098 099 100 101 120 121 122 123 124 125 140 141 142 143 144 145 161 162 182 183 Programming Set Up 224 225 226 227 228 229 245 246 247 248 249 250 251 252 253 254 255 Code Page Katakana Programming Set Up Programming Set Up Programming Set Up 084 085 086 106 107 108 Programming Set Up Programming Set Up 168 169 170 190 191 192 193 210 Programming Set Up 254 Code Page 866 Cyrillic Programming Set Up Programming Set Up 072 073 074 075 076 077 084 085 086 106 107 108 128 147 148 149 150 171 172 173 174 Programming Set Up Programming Set Up 234 235 236 237 253 254 255 Programming Set Up Safety Requirements ServiceService Normal Operation Troubleshooting ProceduresServicing the Display Servicing the VFD or LCD Remove only two cabinet screws Remove power from the unit before cleaning Cleaning the Display