I find a ARM7+ARTX manual and where are downloads manual?
Look to the top of the page, in the blue band immediately beneath the "ARM" and "KEIL" logos:
Support > View on-line product manuals
Alternatively:
Products > ARM > Product Manuals (in the sidebar to the left of the page)
"These products have been replaced by the RL-ARM Real-Time Library."
http://www.keil.com/update/ararm.asp