Enabling external IO devices

Contacted Vincent Crabtree about his project to port Linux. He told me about IDA which is a great interactive dissasembler. he also sent me his partially disassembled ROM.
From this, I see that alios is missing loads of CSC configuration, so I implemented this and tried again.
What I now have is:

Internal UART as com2
Enable GP_CSA and GP_CSB - external ISA chip selects
This required mods to the linux kernel and the initrd image and now I have the kernel booting again, but still no external devices :(