I do not need my B9 to earn money, so I'm free to experiment with it and to use it to indulge other interests, namely designing hard and software.
Functionally the B9 Software consist of two parts.
The design part to add supports and slice the model and the printer control part to ... obviously control the printer.
As adding supports and slicing is basically part of the design process, it is done on my "main" computer.
Printer control is run from a computer connected to the B9.
Having a 1.1 and a1.2 machine that's two additional computers - it might be possible to do with just one, but I'm not that confident that this will work out well.
Those control computers can be very simple machines, but instead to look for some cheap netbook, I decided to go the full Monty and to create some "intelligent printer controller".
Each printer controller consist of an RaspberryPI, power supply and if desired a Wireless Dongle. The Hardware costs less than 60€ as a set. Taking an educated guess I'd expect the price in the US to be about 60$.
I used a Raspberry B, you could also use a B+, if you wanted. The Wireless Dongle occupies one USB port (the Raspberry has ethernet on board, so you could forgo the Wireless Dongle), the USB cable from the printer occupies the second USB port.
The HDMI cable from the projector is connected to Raspberry's HDMI port.
The Raspberry mounted at the back of the 1.2. The keyboard and display are only printed on the casing and have no function. When using a Wireless Dongle the "greater Printer" needs only power.
The Raspberry shows a split personality to the world.
A network drive, so you can copy files to it's storage - as this is a standard samba server, you can slice your model directly onto the Raspberry's drive.
It also puts up a webpage, which allows you to control the B9 from any "modern" browser.
The Raspberry supports all the printer, material and calibration commands you're used to from the B9 software.
All file formats including the Material library are compatible and so it the Factor Calculator.
There might be differences in the handling of the exposure regarding hotspot and slope - I can't check, because the sources are not longer available.
The Webpage can be accessed from everywhere, if you setup your network accordingly, you could even control it over the internet.
Multiple computers can access it simultaneously. So you can finish a task on the printer from one device, even if it was started on some other device.
The iMac in the back has two browser windows open, connected to the 1.1 (black bar) and 1.2 (blue bar) B9ers.
The iPhone and iPad are connected to the 1.1. All changes are reflected on all devices at the same time.
It's convenient to have a device for printer control at the printer. In this case I use an iPad mounted on a goose neck. The cable connection is the power supply. Of course, I could use my phone or an "mobile" iPad, but having the iPad mounted spares you to look for a save space to lay it down and keeps it out of harms way.
I use the iPad for both B9s - which are located to each other - I just have to tap to switch between them. I could write a browser that has a split window - there's an idea.
The hardware is an unmodified RaspberryPi B.
The software consists of an special application and some data files.
For using Wireless and the Samba Server, you will have to change some configuration files. I could do a setup script for that. Better would be to have a fully configured disk image, but I will have to check copyright issues for that.