System information

The commands I, J, M, N, R, and S should be typed as i, j, m, n, r, and s if both upper- and
lower-case characters are used in the operation, otherwise all characters are converted to
upper-case. When a command is entered in upper-case, ED automatically converts the associated
string to upper-case, and vice versa.
End of Section 2
2.3 Control Characters and Commands CP/M Operating System Manual
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