Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 42 (Page No. 433)

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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 49 (Page No. 433 - 434)
In the text we gave an example of how to draw a rectangle on the screen using the Windows GDI: Rectangle(hdc, xleft, ytop, xright, ybottom); Is there any real need for the first parameter (hdc), and if so, what? After all, the coordinates of the rectangle are explicitly specified as parameters.

In the text we gave an example of how to draw a rectangle on the screen using the Windows GDI:Rectangle(hdc, xleft, ytop, xright, ybottom);Is there any real need for the ...

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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 48 (Page No. 433)
In Fig. 5-36 there is a class to RegisterClass. In the corresponding $X$ Window code, in Fig. 5-34, there is no such call or anything like it. Why not?

In Fig. 5-36 there is a class to RegisterClass. In the corresponding $X$ Window code, in Fig. 5-34, there is no such call or anything like it. Why not?

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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 47 (Page No. 433)
Assuming that it takes $2\: nsec$ to copy a byte, how much time does it take to completely rewrite the screen of an $80\: \text{character} \times \text{25}$ line text mode memory-mapped screen? What about a $1024 \times 768$ pixel graphics screen with $24$-bit color?

Assuming that it takes $2\: nsec$ to copy a byte, how much time does it take to completely rewrite the screen of an $80\: \text{character} \times \text{25}$ line text mod...

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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 46 (Page No. 433)
One way to place a character on a bitmapped screen is to use BitBlt from a font table. Assume that a particular font uses characters that are $16 24$ pixels in true RGB color. How much font table space does each ... a byte takes $100\: nsec,$ including overhead, what is the output rate to the screen in characters/sec?

One way to place a character on a bitmapped screen is to use BitBlt from a font table. Assume that a particular font uses characters that are $16 × 24$ pixels in true RG...

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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 42 (Page No. 433)

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