#!/usr/bin/perl
#
# mkboot - generate a bitstream (in .bit format) that boots an M1
#          with the "regular" bitstream, using UrJTAG
#
# Hacked 2001 by Werner Almesberger
#

# magic, copied from xilinx_bitstream.c:xlx_bitstream_load_bit
print pack("C*",
    0x00, 0x09, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0,
    0x0f, 0xf0, 0x00, 0x00, 0x01);

@seq = (
#    0xffff,	# DUMMY
    0xaa99, 	# Sync(1)
    0x5566,	# Sync(2)
    0x3261,	# write GENERAL1
    0x0000,	# start address 15:0
    0x3281,	# write GENERAL2
    0x0037,	# start address 23:16
    0x30a1,	# write CMD
    0x000e);	# IPROG
#    0x2000);	# NOP

print pack("aN", "e", 2*@seq);

print pack("n*", @seq);