Eyes & Lichty: Difference between revisions

Latest revision as of 06:12, 19 December 2023

"Eyes & Lichty" is scene slang for the excellent manual "Programming the 65816 Including the 6502, 65C02, and 65802" by David Eyes & Ron Lichty. It may be the best unofficial textbook on SNES programming, due in no small part to the fact that the Ricoh 5A22 is based on the 65c816 and the SPC700 is based on the 6502.

Addressing Mode

Eyes & Lichty divides the 65c816's various addressing modes into two groups: simple and complex. Simple addressing modes are explained first and require the processor to do little effective address calculation. They are:

Simple Addressing Modes

see page 108

Complex Addressing Modes

Absolute Indexed with X
Absolute Indexed with Y
Direct Page Indexed with X
Direct Page Indexed with Y
Direct Page Indirect Indexed with Y
Direct Page Indexed Indirect with X
Absolute Indexed Indirect
Direct Page
Absolute Long Indexed With X
Direct Page Indirect Long Indexed with Y
Stack Relative
Stack Relative Indirect Indexed with Y

see page 197

Eratta

page 497 recommends making sure the carry flag is already set, or to set it with SEC prior to doing a SBC to "avoid subtracting the carry flag" but it should say "to avoid subtracting one"
page 510 on TCD and page 512 on TDC mentions the direct page register, but this is missing from the index
In the tables that show which MPU supports which instructions, an "X" denotes yes and a " " denotes no. Many readers would find a check mark less confusing.
The Rockwell 65c02 does not have a direct page, but the four Rockwell instructions are listed as having Direct Page Addressing anyway "for consistency."
The 65c02 datasheet does mention WAI is supported
The addressing mode for WDM is missing, but the datasheet says it is Implied
Assemblers are described as requiring the signature byte for COP, but on the next page it says the signature byte is optional
The page on PLA has a typo that says the 65x pull instructions "set" the zero and negative flags; it should say "affect."

Quick Links

Part I Basics

Basic Assembly Language Programming Concepts

@@ Line 1: / Line 1: @@
 "'''Eyes & Lichty'''" is scene slang for the excellent manual "Programming the 65816 Including the 6502, 65C02, and 65802" by David Eyes & Ron Lichty.  It may be the best unofficial textbook on SNES programming, due in no small part to the fact that the [[Ricoh 5A22]] is based on the 65c816 and the [[SPC700]] is based on the 6502.
+=== Addressing Mode ===
+Eyes & Lichty divides the 65c816's various addressing modes into two groups: simple and complex.  Simple addressing modes are explained first and require the processor to do little effective address calculation.  They are:
+==== Simple Addressing Modes ====
+* [[Immediate]]
+* [[Absolute]]
+* Direct Page
+* [[Accumulator Addressing|Accumulator]]
+* [[Implied]]
+* [[Stack Addressing|Stack]]
+* [[Direct Page Indirect]]
+* [[Absolute Long]]
+* [[Direct Page Indirect Long]]
+* [[Block Move Addressing|Block Move]]
+see page 108
+==== Complex Addressing Modes ====
+* Absolute Indexed with X
+* Absolute Indexed with Y
+* Direct Page Indexed with X
+* Direct Page Indexed with Y
+* Direct Page Indirect Indexed with Y
+* Direct Page Indexed Indirect with X
+* Absolute Indexed Indirect
+* Direct Page
+* Absolute Long Indexed With X
+* Direct Page Indirect Long Indexed with Y
+* Stack Relative
+* Stack Relative Indirect Indexed with Y
+see page 197
 === Eratta ===
+* page 497 recommends making sure the carry flag is already set, or to set it with [[SEC]] prior to doing a [[SBC]] to "avoid subtracting the carry flag" but it should say "to avoid subtracting one"
+* page 510 on [[TCD]] and page 512 on [[TDC]] mentions the [[direct page register]], but this is missing from the index
 * In the tables that show which MPU supports which instructions, an "X" denotes yes and a " " denotes no.  Many readers would find a check mark less confusing.
+* The Rockwell 65c02 does not have a direct page, but the four Rockwell instructions are listed as having [[Direct Page Addressing]] anyway "for consistency."
+* The 65c02 datasheet does mention [[WAI]] is supported
+* The [[addressing mode]] for [[WDM]] is missing, but the datasheet says it is [[Implied]]
+* Assemblers are described as requiring the [[signature byte]] for [[COP]], but on the next page it says the signature byte is optional
+* The page on [[PLA]] has a typo that says the 65x pull instructions "set" the zero and negative flags; it should say "affect."
 === Quick Links ===
@@ Line 12: / Line 53: @@
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n19	Introduction]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n21	How to Use this Book]
-*[https://archive.org/details/0893037893ProgrammingThe65816/page/n27	Part I Basics]
+====[https://archive.org/details/0893037893ProgrammingThe65816/page/n27	Part I Basics]====
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n29	Basic Assembly Language Programming Concepts]
-*[https://archive.org/details/0893037893ProgrammingThe65816/page/n49	Part II Architecture]
+====[https://archive.org/details/0893037893ProgrammingThe65816/page/n49	Part II Architecture]====
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n51	Architecture of the 6502]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n71	Architecture of the 65C02]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n75	Sixteen-Bit Architecture: The 65816 and the 65802]
-*[https://archive.org/details/0893037893ProgrammingThe65816/page/n99	Part III Tutorial]
+====[https://archive.org/details/0893037893ProgrammingThe65816/page/n99	Part III Tutorial]====
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n101	SEP, REP, and Other Details]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n109	First Examples: Moving Data]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n133	The Simple Addressing Modes]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n165	The Flow of Control]
-*[https://archive.org/details/0893037893ProgrammingThe65816/page/n181	Built-IN Arithmetic Functions]
+*[https://archive.org/details/0893037893ProgrammingThe65816/page/n181	Built-In Arithmetic Functions]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n205	Logic and Bit Manipulation Operations]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n223	The Complex Addressing Modes]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n251	The Basic Building Block: The Subroutine]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n275	Interrupts and System Control Instructions]
-*[https://archive.org/details/0893037893ProgrammingThe65816/page/n291	Part IV Applications]
+=====[https://archive.org/details/0893037893ProgrammingThe65816/page/n291	Part IV Applications]=====
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n293	Selected Code Samples]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n325	DEBUG16 - A 65816 Programming Tool]
@@ Line 35: / Line 76: @@
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n399	The Addressing Modes]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n447	The Instruction Sets]
+<div style="column-count:10">
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n449	ADC]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n451	AND]
@@ Line 125: / Line 167: @@
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n550	XBA]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n551	XCE]
+</div>
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n553	Instruction Lists]
 *[https://archive.org/details/0893037893ProgrammingThe65816/page/n567	Appendices]
@@ Line 143: / Line 186: @@
 [[Category:ASM]]
 [[Category:Books]]
+[[Category:Scene Slang]]