【工具】Error[e16]: Segment ISTACK (size: 0xc0 align: 0) is too long for segment definition.

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一、参考链接：

厉害了，我是链接，快点我
厉害了，我的哥，我也是参考链接，快快点宝宝

二、问题：

IAR For 8051 9.20.2点击低版本的IAR for 8051 7.40的Project时候，会出现以下问题。

三、现象：

Error[e16]: Segment ISTACK (size: 0xc0 align: 0) is too long for segment definition. At least 0x7 more bytes needed. The problem occurred while processing the segment placement command "-Z(IDATA)ISTACK+_IDATA_STACK_SIZE#08-_IDATA_END", where at the moment of placement the available memory ranges were "IDATA:47-ff" Reserved ranges relevant to this placement: IDATA:8-1f VREG IDATA:21-3f VREG IDATA:40-41 XSP IDATA:42-42 DATA_I IDATA:43-44 DATA_Z IDATA:45-46 IDATA_Z IDATA:47-ff ISTACK BIT:0-7 BREG BIT:80-97 SFR_AN BIT:a0-af SFR_AN BIT:b8-c7 SFR_AN BIT:e8-ef SFR_AN BIT:f8-ff SFR_AN Error while running Linker

四、修改：

点击Project -> Option -> General Option -> Target Tab
修改 : Number of virtual registers, from 16 –> 8.

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