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请教TMS320C5534的cmd文件的VECS问题

各位专家,在编辑cmd文件时遇到一些问题,用的是ccs5.3

1.CCS安装路径下D:\ti\ccsv5\ccs_base\c5500\include中的C5534.cmd中,VECS放在了ROM中

ROM: o = 0xFE0000 l = 0x01FF00 /* 128kB ROM (MPNMC=0) or CS5 (MPNMC=1) */
VECS: o = 0xFFFF00 l = 0x000100 /* reset vector */

2.目前可用的cmd文件中,VECS放在了SARAM中

VECS (RWIX): origin = 0x04FE00, length = 0x000200 /* 512B */
PDROM (RIX): origin = 0xff8000, length = 0x008000 /* 32KB */

问题1:请问VECS应该放在SARAM中还是ROM中?

问题2:若要放在SARAM中,因5534只有192kB SARAM,VECS (RWIX): origin  = 0x04FE00,可以进中断,当我改成 0x03FE00时反而进不了中断,请问是什么原因?