Is all of the 4kb internal ROM on Intel MCS-51 available for user code? Are there any system routines that might take up some of the space? I managed to optimize my code to 4091b and I'd really like to know whether I need to optimize it further.
Thanks.
No!
It had UV-EPROM!
"was available with a window"
To let the UV light in.
"Those Parts where erasable"
Yes - but not electrically eraseable!
Sorry about, that I stuttered The Intel 8751 had EPROM.