Talk:Z80 Instruction Set - Revision history

Dan Englender at 14:43, 28 November 2006

2006-11-28T14:43:09Z

Aquanight at 04:49, 28 November 2006

2006-11-28T04:49:30Z

CoBB at 10:52, 25 February 2006

2006-02-25T10:52:04Z

JasonM: Wait, I don't want this to be a minor change. :-)

2005-12-30T22:14:07Z

Wait, I don't want this to be a minor change. :-)

JasonM at 22:13, 30 December 2005

2005-12-30T22:13:15Z

FloppusMaximus at 23:53, 25 December 2005

2005-12-25T23:53:08Z

Jib at 23:38, 25 December 2005

2005-12-25T23:38:49Z

58.178.128.231 at 23:37, 25 December 2005

2005-12-25T23:37:25Z

24.232.96.208 at 02:58, 24 December 2005

2005-12-24T02:58:59Z

FloppusMaximus at 20:28, 23 December 2005

2005-12-23T20:28:00Z

← Older revision		Revision as of 14:43, 28 November 2006
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	Considering the length of the table, would it be a good idea to repeat the column headers every so often (so people don't have to scroll all the way back up to see what order the flags are in, for example - easy to get lost with such narrow columns)? -- [[User:Aquanight\|Aquanight]] 20:49, 27 November 2006 (PST)		Considering the length of the table, would it be a good idea to repeat the column headers every so often (so people don't have to scroll all the way back up to see what order the flags are in, for example - easy to get lost with such narrow columns)? -- [[User:Aquanight\|Aquanight]] 20:49, 27 November 2006 (PST)
		+	: Yes --[[User:Dan Englender\|Dan Englender]] 06:43, 28 November 2006 (PST)

← Older revision		Revision as of 04:49, 28 November 2006
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	:Since I coded the Z80 core of PindurTI from scratch, I have some useful information at my disposal that I hunted down from various places on the web, especially regarding flags. A big table would be the most effective method in my opinion, I'll start building something on my user page. [[User:CoBB\|CoBB]] 02:52, 25 Feb 2006 (PST)		:Since I coded the Z80 core of PindurTI from scratch, I have some useful information at my disposal that I hunted down from various places on the web, especially regarding flags. A big table would be the most effective method in my opinion, I'll start building something on my user page. [[User:CoBB\|CoBB]] 02:52, 25 Feb 2006 (PST)
		+
		+	Considering the length of the table, would it be a good idea to repeat the column headers every so often (so people don't have to scroll all the way back up to see what order the flags are in, for example - easy to get lost with such narrow columns)? -- [[User:Aquanight\|Aquanight]] 20:49, 27 November 2006 (PST)

← Older revision		Revision as of 10:52, 25 February 2006
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	::You're right, it could be. Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours. So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''. Much easier to remember than hexadecimal. But that's just me. I think you're right, binary would be better. [[User:FloppusMaximus\|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)		::You're right, it could be. Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours. So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''. Much easier to remember than hexadecimal. But that's just me. I think you're right, binary would be better. [[User:FloppusMaximus\|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)
	:::Can we just do both? I think I have enough screen real-estate. --[[User:JasonM\|JasonM]] 14:13, 30 Dec 2005 (PST)		:::Can we just do both? I think I have enough screen real-estate. --[[User:JasonM\|JasonM]] 14:13, 30 Dec 2005 (PST)
		+
		+	:Since I coded the Z80 core of PindurTI from scratch, I have some useful information at my disposal that I hunted down from various places on the web, especially regarding flags. A big table would be the most effective method in my opinion, I'll start building something on my user page. [[User:CoBB\|CoBB]] 02:52, 25 Feb 2006 (PST)

← Older revision		Revision as of 22:14, 30 December 2005
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	::You're right, it could be. Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours. So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''. Much easier to remember than hexadecimal. But that's just me. I think you're right, binary would be better. [[User:FloppusMaximus\|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)		::You're right, it could be. Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours. So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''. Much easier to remember than hexadecimal. But that's just me. I think you're right, binary would be better. [[User:FloppusMaximus\|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)
−	:::Can we just do both? --[[User:JasonM\|JasonM]] 14:13, 30 Dec 2005 (PST)	+	:::Can we just do both? I think I have enough screen real-estate. --[[User:JasonM\|JasonM]] 14:13, 30 Dec 2005 (PST)

@@ Line 19: / Line 19: @@
 :A quick reference for people who actually know what they're doing.  For those who don't, these tables should of course be accompanied by detailed descriptions of what the various opcodes actually do.
 :Any comments before I go and waste a few hours wikifying the rest of the Z80 instruction set?
 :Please don't use parentheses for anything other than indirection!
 :[[User:FloppusMaximus|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)
@@ Line 26: / Line 27: @@
 ::You're right, it could be.  Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours.  So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''.  Much easier to remember than hexadecimal.  But that's just me.  I think you're right, binary would be better. [[User:FloppusMaximus|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)

← Older revision		Revision as of 23:53, 25 December 2005
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	:A binary representation would be more useful -- [[User:Jib\|Jib]]		:A binary representation would be more useful -- [[User:Jib\|Jib]]
		+
		+	::You're right, it could be. Of course octal is useful -- just take a look at a complete table of the instructions; everything is grouped by eights and sixty-fours. So I know that 1''r'' ''s'' = LD ''r'',''s'', or that 3''a''6 ''nnn'' = ALU(''a'') ''nnn'', or that 3''z''7 = RST 0''z''0, or less obviously that 3''c''0 = RET ''c''. Much easier to remember than hexadecimal. But that's just me. I think you're right, binary would be better. [[User:FloppusMaximus\|FloppusMaximus]] 15:53, 25 Dec 2005 (PST)

← Older revision		Revision as of 23:38, 25 December 2005
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	::Is providing an octal representation actually useful for anything?		::Is providing an octal representation actually useful for anything?

−	::A binary representation would be more useful -- [[User:Jib\|Jib]]	+	:A binary representation would be more useful -- [[User:Jib\|Jib]]

← Older revision		Revision as of 23:37, 25 December 2005
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	:[[User:FloppusMaximus\|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)		:[[User:FloppusMaximus\|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)
	::Is providing an octal representation actually useful for anything?		::Is providing an octal representation actually useful for anything?
		+
		+	::A binary representation would be more useful -- [[User:Jib\|Jib]]

← Older revision		Revision as of 02:58, 24 December 2005
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	:Please don't use parentheses for anything other than indirection!		:Please don't use parentheses for anything other than indirection!
	:[[User:FloppusMaximus\|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)		:[[User:FloppusMaximus\|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)
		+	::Is providing an octal representation actually useful for anything?

← Older revision		Revision as of 20:28, 23 December 2005
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	We could probably just use one of the publically available instruction set lists to save the time and trouble of typing everything out again.		We could probably just use one of the publically available instruction set lists to save the time and trouble of typing everything out again.
	--Dan 00:28, 22 Dec 2005		--Dan 00:28, 22 Dec 2005
		+
		+	:Emacs.
		+	:Anyway, what you've got so far is not particularly clear, and doesn't really present the important information. I'm thinking of a series of tables something like this:
		+
		+	{\| border="1" cellpadding="2"
		+	! Oct !! Hex !! Instruction !! States !! Clock !! S !! Z !! X !! H !! Y !! P !! N !! C
		+	\|-
		+	\| 100 \|\| 40 \|\| ld b, b \|\| OCF(4) \|\| 4 \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| -
		+	\|-
		+	\| 101 \|\| 41 \|\| ld b, c \|\| OCF(4) \|\| 4 \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| -
		+	\|-
		+	\| 102 \|\| 42 \|\| ld b, d \|\| OCF(4) \|\| 4 \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| -
		+	\|-
		+	\| 103 \|\| 43 \|\| ld b, e \|\| OCF(4) \|\| 4 \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| - \|\| -
		+	\|}
		+
		+	:A quick reference for people who actually know what they're doing. For those who don't, these tables should of course be accompanied by detailed descriptions of what the various opcodes actually do.
		+	:Any comments before I go and waste a few hours wikifying the rest of the Z80 instruction set?
		+	:Please don't use parentheses for anything other than indirection!
		+	:[[User:FloppusMaximus\|FloppusMaximus]] 12:28, 23 Dec 2005 (PST)