What is the big mode and small mode under BC31?

西露塔

What is the big mode and small mode under BC31? Does it mean to have big-endian little-endian under ARM? Thank you in advance!

cat00019

It seems to be internal management, I don't know the specifics

pepe0209

It refers to the mode of memory allocation, because programs in the era of dos are not the same as current windows programs. Most dos programs use real address mode, and the program's memory overhead is different. For example, the data segment of the program you write, The code segment, stack segment, and additional segment are each allocated a 64K memory, but the actual program may not need that much memory. Setting all segments in a 64K address space can improve efficiency and reduce unnecessary expenses. Large mode is to group each segment into a 64K address space, while small is to set all segments of the program in a 64K address space. If necessary, buy a book on microcomputer principles.