Introducing the Instruction Set Part 1 - Revision history

Mr z: Protected "Introducing the Instruction Set Part 1" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

2010-12-04T08:42:17Z

Protected "Introducing the Instruction Set Part 1" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

2008-09-08T09:54:30Z

‎Observing in the Debugger: fixed typo

2008-09-08T09:53:25Z

‎Observing in the Debugger: fixed typo

2008-09-08T09:42:40Z

‎Program Listing: Fixed typo

2007-10-09T22:56:26Z

‎Moving On

2007-10-09T14:42:54Z

‎The CPU Registers

2007-10-08T23:07:20Z

‎Moving On

2007-10-08T23:06:50Z

2007-10-08T22:59:38Z

Introducing the Instruction Set moved to Introducing the Instruction Set Part 1

2007-10-08T22:37:25Z

‎Single Register Arithmetic Instructions

@@ Line 365: / Line 365: @@
 </CODE>
 <BR/>
-You'll notice that our value $6789 appears at location $2F2 (two words in on the top row), andlocations $300, $301 and $302 (first 3 positions in the third row).
+You'll notice that our value $6789 appears at location $2F2 (two words in on the top row), and at locations $300, $301 and $302 (first 3 positions in the third row).
 = Moving On =

@@ Line 350: / Line 350: @@
 The PULR instruction reverses the process.  First, the CPU decrements R6, and then it reads the value R6 now points to from memory into R4.  Notice that we pushed from one register and pulled back into a different one.  While "push" and "pull" operations need to be paired so that the stack stays consistent, nothing prevents you from pushing from one register and pulling into another.
 <BR/><BR/>
-Before you quit jzIntv, let's take a peek a memory real quick, by typing "m 2F0" and pressing enter:
+Before you quit jzIntv, let's take a peek at memory real quick, by typing "m 2F0" and pressing enter:
 <BR/>
 <CODE>

@@ Line 201: / Line 201: @@
          ; Stack instructions
          PSHR    R0              ; put R0 on the stack
-         PULR    R4              ; pull the value back off into R3
+         PULR    R4              ; pull the value back off into R4
 here    B       here            ; Spin forever.

@@ Line 373: / Line 373: @@
 <!--* [[Introducing the Instruction Set Part 1]]:  The CPU, Memory and Registers; Primary Instructions and Addressing Modes-->
 * [[Introducing the Instruction Set Part 2]]:  Single Register and Implied Operand Instructions
-* [[Introducing the Instruction Set Part 3]]:  Shift and Rotate Instructions
+* [[Introducing the Instruction Set Part 3]]:  Branches, Conditional Branches and Calls
-* [[Introducing the Instruction Set Part 4]]:  Branches, Conditional Branches and Calls
+* [[Introducing the Instruction Set Part 4]]:  Shift and Rotate Instructions
 Or, you can return to the [[Programming Tutorials]] index.

@@ Line 32: / Line 32: @@
 <tr><td align=center>R5</td><th>  X   </th><th>&nbsp;</th><th>Auto-increment</th><th>X</th></tr>
 <tr><td align=center>R6</td><th>  X   </th><th>&nbsp;</th><th>[[Stack Mode|Stack]]</th><th>X</th></tr>
-<tr><td align=center>R7</td><th>  *   </th><th>&nbsp;</th><th>Program Counter</th><th>&nbsp;</th></tr>
+<tr><td align=center>R7</td><th>  *   </th><th>&nbsp;</th><th>[[Program Counter]]</th><th>&nbsp;</th></tr>
 </table><BR/>

← Older revision	Revision as of 08:42, 4 December 2010
(No difference)

← Older revision		Revision as of 23:07, 8 October 2007
Line 375:		Line 375:
	* [[Introducing the Instruction Set Part 3]]: Shift and Rotate Instructions		* [[Introducing the Instruction Set Part 3]]: Shift and Rotate Instructions
	* [[Introducing the Instruction Set Part 4]]: Branches, Conditional Branches and Calls		* [[Introducing the Instruction Set Part 4]]: Branches, Conditional Branches and Calls
		+
		+	Or, you can return to the [[Programming Tutorials]] index.

@@ Line 367: / Line 367: @@
 You'll notice that our value $6789 appears at location $2F2 (two words in on the top row), andlocations $300, $301 and $302 (first 3 positions in the third row).
-= Single Register Arithmetic Instructions =
+= Moving On =
-These instructions are fairly simple instructions that operate on a single register:
+At this point, you may wish to continue with the remaining parts of this tutorial:
-<TABLE BORDER>
+<!--* [[Introducing the Instruction Set Part 1]]:  The CPU, Memory and Registers; Primary Instructions and Addressing Modes-->
-<TR><TH>&nbsp;&nbsp;[[TSTR]]&nbsp;&nbsp;</TH><TD COLSPAN=2>Check sign, zero on a register </TD></TR>
+* [[Introducing the Instruction Set Part 2]]:  Single Register and Implied Operand Instructions
-<TR><TH>&nbsp;&nbsp;[[CLRR]]&nbsp;&nbsp;</TH><TD>Set a register to 0           </TD><TD>  R = 0 </TD></TR>
+* [[Introducing the Instruction Set Part 3]]:  Shift and Rotate Instructions
-<TR><TH>&nbsp;&nbsp;[[INCR]]&nbsp;&nbsp;</TH><TD>Increment a register          </TD><TD>  R = R + 1 </TD></TR>
+* [[Introducing the Instruction Set Part 4]]:  Branches, Conditional Branches and Calls

← Older revision	Revision as of 22:59, 8 October 2007
(No difference)

@@ Line 383: / Line 383: @@
 These instructions work equally on all 8 registers.  That includes the program counter.  For instance, "INCR R7" (aka. INCR PC) will skip the next instruction word.  That can be useful for skipping single-word instructions.  "DECR R7" (aka. DECR PC) is equivalent to "here: B here", but is one byte shorter.
-Example:  Consider the value of R0 at each step:
+Example:  Consider the value of R0 at each step in this sequence as it executes:
      CLRR R0   ; Clear R0:            R0 = 0