This dumps the ROM from a Laser 128 while the system is live. Useful if you don't have an EEPROM programmer/reader of your own.
I've only tested this on "new style" Laser 128s, with the red badge on the case. The old black and silver badged models might have a different ROM layout, I'm not sure. It wouldn't surprise me, they're radically different pieces of hardware.
You need to have the Parallel/Serial switch set to Parallel to run. The reason is that the serial firmware for slot 1 is really just a copy of slot 2, so if you have the switch set to Serial, then you get two copies of the serial option ROM and zero copies of the parallel option ROM.
The only part of this I don't quite understand is that 16 bytes from slot 1 don't end up matching the original ROM. They should be all $FF, but there is an odd pattern there instead. I suspect it is either (a) some convoluted logic with the Parallel/Serial switch or (b) something to do with the port configuration you can set by holding "P" while powering up the machine.
## ROM layout
```
0000 - 00FF = empty (reserved for soft switches)
0100 - 07FF = C100-C7FF (INTCXROMON)
0800 - 0FFF = C800-CFFF slot 1 option ROM (INTCXROMON)
There's an overlap because the slot 7 banking register uses 3 bits, which gives you 8 banks, but they only use 6. The other two really belong to the slot 6 option ROM. C800-CBFF for slot 7 is actually RAM dedicated to the disk controller.
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