Xeda, your best bet is to just go disassemble the bcall yourself because I don't think there is anyone who actually understands how it works.
Go into calcsys>Hex editor. Then switch to page 7b, 3b, or 1b respective to calcs. Goto 5221. Goto the address you are now looking at (address followed by page number). And have fun. You basically just did a manual bcall.