本帖最后由 stcisp 于 2013-3-19 14:24 编辑
What's New in C51
C51 的新功能：
The following sections list the changes instituted in each release of the C51 toolset.
以下各节列出提起 C51 工具集的每个版本中的更改。
C51 Version 9.51a Release [µVision]
C51 9.51a 版本发布 [µVision]
This C51 release comes with µVision V4.60.6.10.
Corrected: synchronization of settings between tabs in "Options for Target" dialog.
本 C51 版本附带 µVision V4.60.6.10。
更正："目标选项"对话框中的选项卡之间设置同步。
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另，注意C51评估版本，有如下限制：
C51 Evaluation ToolsC51评价工具
The 8051 compiler, assembler, linker, and debugger are limited to 2 Kbytes of object code. Source code may be of any size.
8051的编译器、汇编器、连接器和调试器被限制到2 k字节的目标代码。源代码则无限制，可以是任意大小的。
Programs that generate more than 2 Kbytes of object code will not compile, assemble, or link.
如程序生成目标代码超过2 k字节将不会编译、汇编或链接。
The debugger supports programs that are 2 Kbytes or smaller.
调试器仅支持2 k字节及以下的程序。
The startup code generated includes LJMPs. Code generated cannot be used in single-chip devices that support 2 Kbytes or less of program space.
生成的启动代码包括LJMPs。生成的代码在单片机上不支持大于2 k字节的程序空间。
Programs start at offset 0x0800. Programs generated with the evaluation software may not be programmed into single-chip devices with less than 2 Kbytes of on-chip ROM.
程序使用得首地址偏移量为0x0800（2048）。评估软件生成的程序不能烧写在在内置ROM小于2 KB的单片机上。
No hardware support for multiple DPTR registers is provided.
不支持硬件使用多个DPTR 寄存器。
No support for floating-point arithmetic and no support for user libraries is provided.
不支持浮点运算和不支持用户库。
No support for in-line assembly using #pragma ASM.
不支持在线装配使用# pragma ASM。
The following components which are present in the PK51 Full Version are not included in the Evaluation Version: Linker for Code Banking, Library Manager, and RTX51 Tiny Real-time Operating System.
评估版本不包含代码库链接器、代码库管理器和RTX51微实时操作系统，它们是PK51完整版组件。
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