Address space overflow

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Read-Only Author Tom wu Posted 6-Mar-2001 11:34 GMT Toolset C51	Address space overflow Tom wu 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
Read-Only Author Alex Ruiz Posted 6-Mar-2001 12:17 GMT Toolset C51	RE: Address space overflow Alex Ruiz 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
Read-Only Author Andrew Neil Posted 6-Mar-2001 13:05 GMT Toolset C51	RE: Address space overflow Andrew Neil Data space is internal RAM within the chip; you can't change its size. How much DATA space does your particular chip have? Try moving everything else out from DATA. Could you use PDATA instead of XDATA?
Read-Only Author Dan Henry Posted 6-Mar-2001 14:02 GMT Toolset C51	RE: Address space overflow Dan Henry If you are using an 8051-based part, which has 128 bytes of internal RAM, you could consider an 8052-based part, which has 256 bytes of internal RAM. --Dan Henry

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