Register parameters
RST 20H, DEFW $DC06
IN:
C = number of bytes to copy (0 to 255)
BHL = extended source pointer
DE = local destination pointer
OUT:
Fc = 0 always
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different
Notes
Bank boundary crossing is automatically handled, If number of bytes to read passes between to banks (typically when reading contents from a File Entry on a File Card).
Bugs
DE has to be in segment 0 or 1. The call does not work if the destination pointer defines memory in segments 2 or 3.
Related calls
GN_Cme, compare null-terminated strings, one local, one extended
GN_Rbe, read byte at extended address
GN_Wbe, write byte at extended address
OS_Bde, copy bytes to extended address