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Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... , proper timings) Z80 emulation code in C with a simple permissive non ... -
Outrun Europa in colourSwainy suggested that he'd like to try his luck with Outrun Europa colorful graphics and see if they can be improved. Let's give him the chance :) A…
... look wrong.
Written in C# so requires .NET enviroment installed ... -
WoS-style forum for programming in C?What's the nearest equivalent to the WoS forum for wannabe C programmers? Ideally with a similar mix of clueless newbies like me and wise old birds t…
What's the nearest equivalent to the WoS forum for wannabe C programmers? Ideally with a similar mix of clueless newbies like me and wise old birds to provide not-too-patronising insight.
Ditto Java? -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... /> You enter hex values an instruction at a time and hit ... function has returned, you type in PRINT USR 61440 (or ... want to address a value in C, why use 03 at all ... br /> 48 = LD C,B
49 = LD C,C
4A = LD ... C,D
4B = LD C,E
Can any C experts help me - have hit an impasseHere is an excerpt from my attempt to program a Bridge game in C. Can you spot where I'm goiing wrong? I am trying to count the points in each ha…
... to program a Bridge game in C. Can you spot where I ... trying to count the points in each hand (Ace = 4, ... to each player's slot in the master array. I ... is pointing at a slot in the master array hands[ ... print the number of points in the hand from the *point_count ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... ,b; ld c,c...
These were actually used in Sprinter to control ... why someone would use the instruction in a program this way.
in the spectrum memory with one in the cpld in one instruction.
Matthew Smith's Andre's Night Off in C&VG - did he really write it?Despite it being written in BASIC, Andre's Night Off is not very good - so what happened exactly? Was the hyperbole surrounding the type-in so much h…
... hyperbole surrounding the type-in so much hot air, ... it written by him in the Software Projects office ... br />
Matthew has said in an interview he dabbled with ... two weeks to make in the accompanying article when ... could knock this out in a day or two? ...Emulator developmentHi, Could anyone explain or direct to a link that explains in not to technical terms how an emulator is developed. It has always blown my mind eve…
... to a link that explains in not to technical terms how ... to write in C or whatever language every possible z80 instruction, and how ... /> Yours mystified
Thanks in advance
jonesyMy own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... /> I programmed a Bios in basic which will be converted ... hell aren't you writing in pure assemler - or at ... all the softare just in case it doesn't ... out several times the instruction set architechture is the ... Advance. It will take in C code at one end and ...128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
... ] which shows the IN A,(C) instruction, but the c is in lowercase, which is ... .e. can the very next instruction make reference to the new ...128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
... ] which shows the IN A,(C) instruction, but the c is in lowercase, which is ... .e. can the very next instruction make reference to the new ...i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... PC on cross-assmeblers and in C for a machine with 48k ... significant portions of a program in C quickly. You still need to ... , I might try it in something like C.
And finally ... User Manual from Zilog. The instruction set description is most useful ...Announce Pasmo 0.5.1Hello. New release 0.5.1 of Pasmo, multiplatform Z80 cross-assmbler. The main news are related to macros: the MACRO parameters now are expanded ins…
... whole point of programming in assembler is to have ... , you might as well program in C instead...
[/quote]
instruction in one line.
[/ ... and precise control of any instruction generated.
[/quote]
Sinclair Basic Vs PascalWith the rise of the structured programming movement (Jackson et al) was it wise to put the Basic programming language into the Spectrum. By this ti…
... to build a large program in C than assembly.[/quote]
... /> I've written things in C and then hand optimized the ... usage in instructions to help the compiler make better instruction selection ... the only way that compiled C is going to approach assembly ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
...
// have single byte 76543210 in bmp
// looking to return ... bmp".
Recall that in C any non-zero value means ... above "modus operandi" expressed in C is almost identical to how ... notes about z88dk C for C people. C provides a left ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... ]
Is there an equivalent in c of doing...
[code ... way to move bytes around in C is to use the library ... uses the LDIR instruction for the byte copy. In general the library ... and faster than equivalent compiled C code so if it makes ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... zcc +zx -vn scroll.c -o scroll.bin -create- ... in there for expression evaluation but the assembler sees a different instruction ... module is included in the project before ... * be an error. In C you're allowed to ... also an error in the C compiler. So I ...Cross Platform DevelopmentWhat's the best way to develop cross platform apps? By best, the only limiting criteria would be "at no cost" :)
... sugar.
After all, in mathematics we don't write ... syntactic sugar is just fine in something like BASIC (which after ... Purpose Symbolic Instruction Code) for newbies.
Expressions in C really just ...Minigame Compo 2007Hi there, also this year, there'll be a minigame competition, open to all 8-bit computers and consoles. It consists on writing games whose size (…
... br /> djnz next1
jr c, dolz
; ... first setted bit is left in C register)
...
ld c, b
inc b
in C
;B=0 ... instruction OR A
; resets the CY flag, so in ...Z88DK fun and gamesHi, I was wondering if anyone here uses Z88DK with TommyGun and knew about how to link the two together (e.g. how do I use a screen, sprite or map e…
... between the two in C that many overlook since C programmers are so ... display file using an LDIR instruction.
The "extern ... would be main.c and the other binary.c. In binary.c you'd ... insert a screen$ resource in place ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... the 3T saving on each instruction, changing it to use ... to switch them in and out. In my tests that ... in the main register set. Perhaps it also depends on the instruction ... S. I keep my flags in C' so testing on any ... /> exx
bit n,c
jr nz,true
Using INPUT without clearing last two lines of screen?I'm trying to print to the 22nd row of the screen using the ol' print #0 trick. Unfortunately, I require user INPUT which seems to wipe out the botto…
... ld a, b
or c
jr nz, .loop
C. If both B and C are zero, ... zero). If either B or C are nonzero, the OR ... to 0x00 (i.e. a C string):
[ ... register already. The interest in this instruction is not what it ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
...
;Store end of scan in C (C is preserved by the RAND16 ... ;Add column and store in C
LD C,A ;BC now contains ... /> ;shifting A left 3 times in C
RLCA
RLCA
instruction,inserting the SEED here
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... the output that the z88dk C compiler makes (or indeed, ... has the lowest address. The C compiler will push "something" followed ... an example from the Spectranet C socket library's bind() ... the return address - so in one instruction we both restore the return ...Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …
... flag when BC = 0, all in one instruction! For example:
ld a,b
or c ;BC = 0?
jp nz ... check for BC = 0 in a single instruction, rather than the four ...Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... that it was, in fact, the most useful instruction ever. When you ... it.
Speaking of C, I gather that Acorn's ... machines implemented a bitwise mirror instruction as a single operation, which ... sure what you'd write in C to compile to that one ...Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... implemented a bitwise mirror instruction as a single operation, ... what you'd write in C to compile to that ... Harlequin V2 has got one in it ;-)
... that were there originally in the ARM2/3 are ... 'm skechy on the 16bit instruction set.
...Cis this a valid instruction? [code] A + B; [/code] If I assign 3 to A and 2 to B; and then "A + B;", then A should equal 5, and B equal 2. Correct?
... '+' operator changes the class in the calculation.
[/ ... of the objects involved in the operation. As ... are involved but C++ extends C semantics to classes; ... ;408996]is this a valid instruction?
[code]
... it.
In C++, A and B can be ...Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
... represents either a shortcoming in the instruction set (and I ... ld bc,$dffe
in a,(c) ; read keys once right ... / right keys
ld c,a ; c = keys
... ,state1
bit 1,c ; check left key
bit 0,c ; check right key
