rom

Rom Flash Program Memory Address of Microchip

Placing code in a specific Rom/Flash/Program Memory Address of Microchip Pic Microcontroller

Recently i was working with 8-bit pic16f877 microcontroller and i want to place program code at a specific rom(read only memory) location. I was working with xc8 compiler and mplabx ide.  Previously i did this same thing many times while using c18 c compiler. C18 compiler uses #pragma code directives to accomplish this task. But when i …

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TWO BITS PER TRANSISTOR: HIGH-DENSITY ROM IN INTEL’S 8087 FLOATING POINT CHIP

The 8087 chip provided fast floating point arithmetic for the original IBM PC and became part of the x86 architecture used today. One unusual feature of the 8087 is it contained a multi-level ROM (Read-Only Memory) that stored two bits per transistor, twice as dense as a normal ROM. Instead of storing binary data, each …

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