$ time ./z80tool.pl write random.rom
Switching Z80 to 'program' mode...
Waiting a moment for data we shouldn't receive...
Testing two-way communication...
Two-way communication successful!
Testing SRAM (stage one)...
SRAM test (stage one) succeeded!
Testing SRAM (stage two)...
SRAM test (stage two) succeeded!
Checking whether Z80 contains EEPROM or SRAM...
Result of memory test: It's protected EEPROM, with fast page mode.
Writing 'random.rom' to Z80 memory...
Sent 32768 bytes, received 32768 bytes (0 seconds)...
Reading Z80 memory contents...
Switching Z80 to 'normal' mode...

EEPROM/SRAM has been programmed and verified!

real    0m3.876s
user    0m0.047s
sys     0m0.036s