We have been working on an expansion backplane/board for the microLind system, I needed some where to add my trusty LED board for some blinking lights. So we designed (almost ready) a board with the possibility to use a 50 pin 5cm SCSI cable to connect the microLind and the expansion board and place them side by side. Or if you solder the expansion connector on the upper side instead you can use a 10cm SCSI cable to connect the boards with the expansion board stacked abowe the microLind.
The expansion board also have an optional auto config addon. This gives you the possibility to auto detect what boards are connected. There will be a document describing the requirements for a auto-detectable expansion card. This addon also gives you an RTC clock and an I2C expansion port for a OLED displad for example. Or anything I2C connected.
There are 6 expansion ports, 1 with 7 bits address space, 1 with 5 bits address space and 4 with 3 bits address space. The first 2 will also have the possibility to utilize DMA.
There is also sockets for 1 or 2 more 512kB RAM chips, for a whopping 2MB RAM in you microLind.
And you know what? It is also possible to chain one more expansion board to the microLind! So it is possible to have 3MB RAM, 12 expansion ports and a range of I2C connected devices to with a microLind system!
