Welcome!
When Workbench loads, select the About option from the Workbench menu- if it reports 40.68 Kickstart then you have
3.1 ROM chips installed.
The Subway works well with an external USB CD as long as you put a self-powered hub between the two devices- this is to prevent the A1200 motherboard being over burdened in respect of power. We can provide A1200 desktop USB rear plate.
We also can also use our PCMCIA transfer kit to install 3.9:
http://amigakit.leamancomputing.com/catalog/product_info.php?products_id=440We develop/supply EasyNet to provide broadband internet access for the A1200:
http://easynet.amigakit.com