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Challenge: Make a Speccy version of "Leisure Suit Larry 1"and put it on this site as a rom c'mon be nice!
Challenge: Make a Speccy version of "Leisure Suit Larry 1"and put it on this site as a rom c'mon be nice!
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... like DEC B affect the flags.
You could DEC ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... ) sets the Z (and other flags). The LD instruction never affects ... the flags.
There are ways ... 8-bit DEC does affect flags as does OR
JR ...IF and control flow in machine codeHi everyone, Basic has a nice control flow like if statements. How can these be done in machine code since i cant find anything thanks
IF and control flow in machine codeHi everyone, Basic has a nice control flow like if statements. How can these be done in machine code since i cant find anything thanks
... register and set various flags according to the result ... does just set the flags - the actual value ... (Z) and 'Carry' (C) flags are most relevant.
If ... jump based on these flags with commands like JR ... which instructions set these flags on their own, and ...Pope coming to BritainThe Pope is coming to Britain tomorrow. Anyone care?
... Party with their little Saltire flags....and I had to stop ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... , clearing the Z and C flags for example.
6) You ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... . Have you thought about a Flags register? A vital part of ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... and the use of traditional flags like carry (which was explicitly ...Help! Reverse engineering a Spectrum game[deleted]
... to monitor variables, program modes/flags and other information that the ...The most rare games?Found a whole stack of games recently up in the loft & wondered what games that go up for sale on ebay get the most cash? will work my way through t…
have you got any chequered flags? down to my last dozen.scrabble, make a chip[url]http://cgi.ebay.co.uk/ZX-SPECTRUM-CLASSIC-SINCLAIR-5-GAME-BUNDLE_W0QQitemZ300479432109QQcategoryZ112866QQcmdZViewItemQQ_trksidZp4340.m506QQ_trkp…
If I hadn't just splashed out on a job lot of Chequered Flags and Psion Chess's I probably would have a go at that bundle.designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... /> 2. Without carry and zero flags how do the conditional jumps ... work? The flags you originally mentioned seem a ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... .
There are four flags that connect to a 4bit ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... />
[quote]There are four flags that connect to a 4bit ...The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …
... , just word sized character codes+flags for palette selection, X/Y ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
INC (HL) sets the flags the same way INC A ... back just to check the flags. But in this case you ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... ;486028]INC (HL) sets the flags the same way INC A ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... ;486028]INC (HL) sets the flags the same way INC A ... back just to check the flags. But in this case you ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... how each instruction affects the flags, you can't expect to ...Rotating Register PairsWhat's the best way to rotate left (or right) a register pair, so that (eg.) FE76 becomes E76F (or 6FE7)? I presume that passing the intermediate bit…
[QUOTE=Ralf;486029]
[CODE]
SCF
CCF ;carry=0 so the new leftmost bit will be 0
[/CODE]
[/QUOTE]
BTW, it's faster to use just OR A to achieve this.
PatrikGames in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... following parameters:
Mode flags (1 = active / 2 = alive ... 128 = visible) etc.
Collision flags (1 = can be killed / ... paramaters:
scroll flags (1 = track player one / ... position, direction volocity and flags. This step would be ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
...
CMP = Compare and set flags
DWORD = 32BITS
WORD ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... and then sets the condition flags
AND - AND logic with ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... command.
No need for flags as branching does the compare ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... , and r29 as a status flags register)
* If I can ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... and many clever uses of flags was just a dream!!! I ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... and then sets the condition flags
0011 AND - AND logic ...
There are two flags, Z and NZ, zero and ... might still add three more flags, less than, equal and greater ...