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Vhdl Code For 8 Bit Microprocessor

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i need vhdl code for 8 bit microprocessor,i am getting problem in timing and control unit....and how to synchronize all the components in microprocessor... if any one have please mail ..... thanks
Read "vhdl programming by example" It is a very good book, The last 4 chapters is talking about designing a microprocessor using vhdl.
I had written a vhdl code for 16 bit microprocessor and i would like to implement this on CPLD. And i would like to know can i made my own PCB or i have to purchase the ready-made board. If it is possible what are the necessary interfacing devices.
i need vhdl code for 8-bit microprocessor
microprocessor: Under computer architecture course, I've to design a microprocessor with 8 bit data and 16 bit address ..minium 20 instructions and at least 2 mode to address. I need to write RTL for instructions and there timing diagrams and block diagram of the circuit. Is there any software which (...)
I want to make a compiler for a microprocessor I am doing in vhdl, a have the instruction set a I just want that the compiler take a txt file with the program , and give an another txt file with machine code. I think visual basic can make the interface part but it also can do the scaner part of the txt file and (...)
vhdl also will pick up cnt <= cnt mod 8; This will work for power-of-two sized counters. Then there is no logic for the comparison. Really, the synthesizer might also notice that already. for other sizes, you can also play some small games. eg, for a 10 element count, choose 1100 - 0011 - 0100 - 0101 - (...)
hi i have just bought a spartan3 starter kit.iam currently developing the 8051 microcontroller core in vhdl so far i have completed all instructions except a few such as div ab . the problem is xst takes a very long time to complete synthesis, the code is about 1300 lines,it takes about 20 min to complete one byte instructions when i include 2 a