Team

From Ece

Revision as of 02:39, 6 November 2009

Team Name and Members

Team name: #One

Team member: Joseph Lee Burnham, Justin Geeslin, Euntai Jung

Design Overview

Our given instruction set was determined from the pseudo code that was provided to us in the project guide. We broke down the pseudo code and determined which instructions would be needed to perform all of the tasks that were specified. We determined that the 18 instructions in our set would be enough to satisfy all of the conditions provided by the code as well as handle any others that might eventually come up.

We decided on four types of instructions I-type instructions, R-type instructions, J-type instructions, and S-type instructions. The R, I, and J type instructions are all the same as the ones that were discussed in class. The S type instructions in a instruction type that was defined by us. We decided to create it because of the constraints in using 16 bit pathways. We found that using regular I type commands we could not take in an immediate value larger than 6 bits but we had to be able to deal with values up to 256 which is 9 bits. Thus we changed the instruction to overwrite the register that was input with the immediate in the case of S type commands. 

Our clock will be set to load data on the rising edge of our clock. On the falling edge we will store data. This applies to both registers and data memory. All other major blocks will not have a preference to rising or falling edge at this time.

Instruction format

R-type:

I-Type:

S-type (Set) :

J-type:

Instructions and Opcodes

R-type:

I-type:

S-type:

J-type:

Assembly language and machine code for the test program (Pseudocode)

Pseudocode for the test program (refer to the project handout):

$v0 = 0040hex; // you can redefine $v0-3, $t0, and $a0-1 with

$v1 = 1010hex; // your register numbers such as $1, $2, etc.

$v2 = 000Fhex;

$v3 = 00F0hex;

$t0 = 0000hex;

$a0 = 0010hex;

$a1 = 0005hex;

while ($a1 > 0) do {

$a1 = $a1 –1;

$t0 = Mem[$a0];

if ($t0 > 0100hex) then {

$v0 = $v0 ÷ 8;

$v1 = $v1 | $v0; //or

Mem[$a0] = FF00hex;

}

else {

$v2 = $v2 × 4;

$v3 = $v3 ⊕ $v2; //xor

Mem[$a0] = 00FFhex;

}

$a0 = $a0 + 2;

}

return;

Tasks and Schedule

Planned Meetings

The design team will meet on the following dates to discuss the project progress and assigned tasks:

• Thursday October 29th 2pm – 3pm
• Thursday November 5th 2pm – 3pm
• Thursday November 12th 2pm – 3pm
• Thursday November 19th 2pm – 3pm