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--- notes:comporg:spring2025:projects:dapx [2025/03/04 04:29] – [Masking] tkastne1
+++ notes:comporg:spring2025:projects:dapx [2025/03/09 15:44] (current) – [Masking] Made asm code format consistent tkastne1
@@ Line 46: / Line 46: @@
 ====OR====
 ====AND====
+The AND op code will do an and comparison of two values
+<code>
+mov  R0,  0x00F00000
+mov  R1,  0x12689649
+and  R0,  R1
+</code>
+This code will leave us with 0x00600000 because every other value was put into and with a zero.
 ====NOT====
 ====NAND====
@@ Line 53: / Line 60: @@
 ====SHIFT====
-===Shift Right====
 ===Shift Left===
+A shift left can be done with the op code SHL
+<code>
+mov  R0,  0x00F00000
+mov  R1,  4
+shl  R0,  R1
+</code>
+This code will give R0 the value 0x0F000000 because the original value was left-shifted by 4 bits.
+===Shift Right====
+There isn't an op code provided by Vircon32 for right shifts, so we must shift left by a negative value.
+<code>
+mov  R0,  0x00F00000
+mov  R1,  -4
+shl  R0,  R1
+</code>
+This code will give R0 the value 0x000F0000 because we shifted the original value to the left by -4 bits.
 =====pseudocode=====
@@ Line 87: / Line 108: @@
 ASCII code for 0 --> decimal 48, hexadecimal 0x30
 ASCII code for x --> 120
-ASCII code for [ --> 92
+ASCII code for [ --> 91
 ASCII code for ] --> 93
 ASCII code for : --> 58
@@ Line 114: / Line 135: @@
 <code>
-   mov   R1,   0xF0000000  ; Creating the mask
+mov   R1,   0xF0000000  ; Creating the mask
-   and   R1,   R0          ; R0 is the original value
+and   R1,   R0          ; R0 is the original value
 </code>
@@ Line 123: / Line 144: @@
 <code>
-   mov   R2,   R3          ; R3 is the loop count
+mov   R2,   R3          ; R3 is the loop count
-   imul  R2,   -4          ; Left shift bits per nibble
+imul  R2,   -4          ; Left shift bits per nibble
-   mov   R1,   0xF0000000  ; Creating the mask
+mov   R1,   0xF0000000  ; Creating the mask
-   shl   R1,   R2
+shl   R1,   R2
-   and   R1,   R0          ; R0 is the original value
+and   R1,   R0          ; R0 is the original value
 </code>
 ====Shifting====
@@ Line 138: / Line 159: @@
 ===Displaying===
+Because we already have the debug function, we can use that to display all of the hex values needed
+The format is identical for every address, and goes as the following: [address]:value
+We can print the brackets and colon manually and leave the address and values to the debug function
+<code>
+mov   R3,         91          ;ASCII code for '['
+out   GPUREGION,  R3
+mov   R3,         0           ;Xpos
+out   XDRAWINGP,  R5
+out   GPUCOMMAND, DRAWREGION  ;Draw
+</code>
+Repeat this for ']' and ':' changing the Xpos and accounting for the address width
+Utilize the debug function to print the address and value as shown in the following
+<code>
+push  R2                      ;R2 is the current address
+mov   R3,         10          ;Xpos
+push  R3
+push  R4                      ;Ypos
+call  _debug
+mov   R3,         [R2]        ;Get the value
+push  R3
+mov   R3,         130         ;Xpos
+push  R3
+push  R4                      ;Ypos
+call  _debug
+</code>
+All of this code should be run for every address, stepping from the start value to the end value
+We will need to setup a loop with an exit condition
+===pseudocode===
+<code>
+MOVE THE STARTING ADDRESS INTO A DEDICATED REGISTER (current address)
+UNTIL WE HAVE PASSED THE FINAL ADDRESS:
+   TEST IF THE CURRENT ADDRESS IS GREATER THAN THE FINAL ADDRESS
+      SHOULD IT BE GREATER SKIP TO AFTER THIS LOOP
+   DISPLAY THE ADDRESS AND VALUE
+   INCREMENT THE YPOS
+   INCREMENT THE ADDRESS
+REPEAT
+</code>
 ======debugregister function======
 =====dapX imagery=====
@@ Line 148: / Line 217: @@
 {{:notes:comporg:spring2024:projects:3.jpg?400|}}
 {{:notes:comporg:spring2024:projects:4.jpg?400|}}
+====dap1====
+{{:notes:comporg:spring2024:projects:3.jpg?400|}}
+{{:notes:comporg:spring2024:projects:4.jpg?400|}}
+====dap2====
+{{:notes:comporg:spring2024:projects:5.jpg?400|}}
+{{:notes:comporg:spring2024:projects:6.jpg?400|}}
 ======Debug Registers======

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