I have a Real-time c51 program, I need a large buffer(120 bytes).Now I use the data segment space, but when I link it an error will appear: "Address space overflow, Length: 001DH". I do not want to use xdata space like: xdata BYTE buf[120], because this type data will affect the executive speed, can I set a large data space? Now I use the uVision/51 for windows Version 1.32. Thanks very much! Tom wu
Tom, If you are using a 8051 there's no more internal mem space available ( you cant change it ), but in the old simulator version you can place your buffer in the Idata segment because there's no distinction between a 51 and a 52. Take a look in the available segments at the Keil Software - C51 Compiler User's Guide 01.97- Explicit Declared Memory Types p. 63. - Alex