For step6, the usage of tinyR’s register is very important. the operations: push r0..r3 when invoking functions should be taken to guarantee correct calculation result. There will be no hidden test cases for this step. To summarize the usage of … Continue reading
Lex&Yacc: micro.y: ————————————————————————————– %{ #include “micro.h” /* put all your custom structures here extern char* yytext; extern FILE* yyin; extern int yylineno, yychar; extern int yylex(); /* put other custom functions here */ /* you can also put main() here … Continue reading
1. The grammar is in extended BNF, please refer to textbook chapter 4 for how to convert it to CFG. 2. The decl_list part of the grammar is tricky. It is actually ambiguous. There are two ways to handle it: … Continue reading
FAQ: 1. Did I turn in correct? A: As long as you see the output like the example on webpage, your files are turned in, but it is more convenient for me to create scripts for grading if the makefile … Continue reading
Have a copy of all the pin assignments for 7447, 7-seg display, and the ground & power pin assignments for the PLDs, especially the GAL26. Since you may not bring your own sheet for the LPE, although we have reference … Continue reading
This lab may not take a long time if you’ve finished the prelab in advance. Here are a few points to note for the ABEL file: Adding the clock signal for the first pushbutton in the abel file for GAL16 … Continue reading
I’ve gone through the preparation of this lab. In general, it is not hard, but trivial. You can get most of the code out for the 3 skeleton files from the lecture notes 6. The only thing to take care … Continue reading
This lab seems a little bit confused for most of us. I used a lot of time to figure out what’s the document talking about. Here are some points I’d like to address. Two push buttons are used for input … Continue reading
I’m sorry for making mistakes for the Lab Division 5 students. For the last thought question, the current that a 74LS47 can sink is 24mA, not 3.2 mA. It can be obtained from the data sheet’s item – IO(ON) = … Continue reading
A+B+F = all of the terms. So, F can be replaced by (A+B)’, and the same for A and B likewise. There are no parts like 3-input NOR gate in your DK-1 parts kit. Go to Programs-> ECE Software -> … Continue reading