sload − download Motorola S-record images via a serial line [ -a ] console_device accepts a subset of the Motorola s-record protocol.  The record types accepted are: 0, 3, and 7; see for a description of the s-record format.  The UMIPS-BSD command may be used to produce s-record images.  The UMIPS-BSD command may be used to download the s-record images with the tip command "~> file".  If the "-a" flag is not specified, the prom will reply to each s-record received having a valid checksum with an ascii ACK, records that checksum incorrectly have an ascii NACK sent in reply.  Sload is not used at MIPS, and therefore has not been debugged.  Consider it a starting point.  Currently, tip does not handle the ACK/NACK acknowledgements, so the -a option should be specified.  convert(1), tip(1), load(1spp), srec(5spp)