Question about the initial value of IDATA in STARTUP.a51

In C51 manual,the IDATA memory type is described as following: Indirectly addressable internal data memory; accessed across the full internal address space ( 256 bytes ). But in file of STARTUP.a51...
Question about the initial value of IDATA in STARTUP.a51

In C51 manual,the IDATA memory type is described as following: Indirectly addressable internal data memory; accessed across the full internal address space ( 256 bytes ). But in file of STARTUP.a51...
newbie question re DATA / IDATA

I use uVision2, and am moving from 87C51 to 87C51RA2 . . . going from 128B of RAM to 512B RAM. Was having trouble with lack of RAM in the C51 due to a large number of variables. From what I understand...
newbie question re DATA / IDATA

I use uVision2, and am moving from 87C51 to 87C51RA2 . . . going from 128B of RAM to 512B RAM. Was having trouble with lack of RAM in the C51 due to a large number of variables. From what I understand...
Memory class question

Is it possible to place some critical variables, as near memory type, in the on-chip 1K memory, yet other non-critical variables, still declared as near memory type, in the external memory? In other words...