Assembly data types limits and examples

Question

I'm taking an Assembly Language class and the book gives me a list of data types:

• BYTE - 8 bit unsigned integer
• SBYTE - 8 bit signed integer
• WORD - 16 bit unsigned integer
• SWORD - 16 bit signed integer
• DWORD - 32 bit unsigned integer
• SDWORD - 32 bit signed integer
• FWORD - 48 bit integer
• QWORD - 64 bit integer
• TBYTE - 80 bit (10 byte) integer
• REAL4 - 32 bit (4 byte) short real
• REAL8 - 64 bit (8 byte) long real
• REAL10 - 80 bit (10 byte) extended real

Just as the title says, I'm hoping to get information on the upper/lower limits of each of these data types, and maybe some examples.

Answer 1

Limit of an unsigned type:

0 to 2^bit_count - 1

Limit of a signed type:

-(2^(bit_count-1)) to (2^(bit_count-1))-1

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For example, an unsigned byte's limit is:

0 to 255

And a signed word's limit is:

-32768 to 32767

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I'm not entirely sure what the real numbers are, but my assumption is that they are floating point numbers.

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For more info, see here.