The System Manual of SOL-20 - History of Computers

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PROCESSOR TECHNOLOGY CORPORATION Sol-PC SINGLE BOARD TERMINAL COMPUTER TM SECTION III IC NO. ( ) U59 ( ) U60 ( ) U62 ( ) U74 74LS86 ( ) U75 74LS109 ( ) U87 7406 ( ) U88* 4049* ( ) U102* 4001* TYPE 74LS20 74LS02 or 9LS02 93L16 *MOS device. Refer to CAUTION on Page 111-8. ( ) Step 25. Apply power to Sol-PC and check display section timing chain operation. If you have an oscilloscope, use part A of this step. If you do not, use part B. A. Oscilloscope Check ( ) Using an oscilloscope, check for the waveforms given in Figure 3-5 at the indicated observation points and in the order given. The waveforms shown in Figure 3-5 approximate actual waveforms. If any waveforms are incorrect, determine and correct the cause before proceeding with assembly. NOTE Irregularities up to 1 volt are acceptable on positive portions of waveforms. Negative portions, however, should be relatively flat. B. Volt-ohm Meter Check ( ) Using the test probe made in Step 16B, measure the voltage at pin 12 of U28. You should measure approximately 1 V dc. If you get a significantly lower reading, find and correct the cause before you proceed with assembly. ( ) Turn off power supply and disconnect power connector. ( ) Step 26. Check synchronization circuits. ( ) Set all S1 switches to OFF. ( ) Connect Sol-PC video output cable to video monitor. SEE CAUTION ON PAGE III-22 BEFORE CONNECTING MONITOR. (Step 26 continued on Page 111-22.) III-20
PROCESSOR TECHNOLOGY CORPORATION Sol-PC SINGLE BOARD TERMINAL COMPUTER TM SECTION III CHECK POINT WAVEFORM 4V ( ) U28, Pin 12 ti*O+ 250 ns -1 Gnd ( ) U47, Pin 8 +i 600 ns < 64 us > ( ) U59, Pin8 -9f- 550 ns < 800 us > ( ) U43,Pin9 ( ) U88, Pin 10 + * 4 us < 62 us > ( ) U88, Pin 4 C- 0.6 ms < 16.2 ms > Figure 3-5. Display section timing waveforms. Rev A III-21
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VIII THEORY OF OPERATION 8.1 INTROD
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SECTION IX SOFTWARE Sol TERMINAL CO
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M0100 SOLOS (tm) /CUTER (tm) USER'S
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P R E F A C E This manual describes
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TABLE OF CONTENTS (cont.) IV. SET C
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INTRODUCTION (cont.) Only the first
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II. CONSOLE COMMANDS Console Comman
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III. TAPE COMMANDS Tape commands ar
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III. TAPE COMMANDS (cont.) Note: A
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V. SET COMMANDS (cont.) The Output
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V. SET COMMANDS (cont.) The Custom
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V. SUBROUTINES A. Introduction to t
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V. SUBROUTINES (cont.) JUMP TABLE A
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V. SUBROUTINES (cont.) AOUT entry p
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V. SUBROUTINES (cont.) When calling
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V. SUBROUTINES (cont.) SOLOS provid
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VI. LOADING & EXECUTING CUTER (Appl
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