/members-area/personalblogs/b/blog/posts/bp-0x0002Installed freeware Bricx Command Center (BricxCC) on my Dell Laptop running WinXP Pro. Serial port wired to IR tower and loaded firmware to my Lego RCX1.0. No problems at all! It is fantastic! Then I compiled a simple BEEP program and it worked perfeen-USTelligent Community 12