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Wanted: Game Ideas!Ok then here goes nothing. I'm a reasonably good programmer, but I'm really no good at coming up with game ideas and graphics. So if any of you have…
... interested in helping?
Please state your name (nick), what you ... /> Can do: TommyGun plugins and Z80 coding
Hours per week ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... 256 banks of 16k. The Z80 address space
is split ... 09BF contain ZXCF compatible IDE registers.
Note that BLK0 ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... certain bits in the bank registers. This means that you could ... bits of said registers (as well as storing CPU state etc).
Wanted: Game Ideas!Ok then here goes nothing. I'm a reasonably good programmer, but I'm really no good at coming up with game ideas and graphics. So if any of you have…
... interested in helping?
Please state your name (nick), what you ... /> Can do: TommyGun plugins and Z80 coding
Hours per week ... /> Nick: Retrocoder
Can do: Z80 coding + stuff no one else ...ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... 256 banks of 16k. The Z80 address space
is split ... 09BF contain ZXCF compatible IDE registers.
Note that BLK0 ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... move the top of the z80's stack to 54016. You ... 've written I use whatever registers I want to either make ... . The Basic system puts the z80 in im1 mode, which means ...When do you optimise?I was just wondering when people here optimise their code. Do they wait till it is all done or do they code a routine and then optimise that?
... for other compilers for the Z80 because I don't know ... 's it.
The Z80 is general is not the ... to make better use of registers and some of the more ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... /> This is the time in z80 cycles that SP1 takes to ... buffer. The pixel buffer's initial contents are not entirely predictable ...When do you optimise?I was just wondering when people here optimise their code. Do they wait till it is all done or do they code a routine and then optimise that?
... improving register allocation; but the Z80 instruction set is asymmetric. This ... more difficult because only certain registers can be involved in certain ... them to be sitting in registers where they can be used ...When do you optimise?I was just wondering when people here optimise their code. Do they wait till it is all done or do they code a routine and then optimise that?
... improving register allocation; but the Z80 instruction set is asymmetric. ... more difficult because only certain registers can be involved in ... ]
The free z80 C compilers that try optimization ... mitigates the penalty by using registers for up to two ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... *3*(762+1223+650) = 79050 z80 cycles (just over one frame ... 10*3*3*439 = 39510 z80 cycles, a speedup of 79050 ... -39510 = 39540 z80 cyles (about half a frame ... only has to keep the initial unshifted graphics in memory.
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... can be shared across all z80 targets supported by z88dk (ie ... song/sound effect's output state into an AY data structure ... about 100 bytes for the z80 decompresser and all ready to ...Spectrum Game NewsSome snippets of Spectrum game news , via the RT forum and micro mart if you guys are interested.... [url]http://www.retro-trader.com/forum/index.p…
... based ones , we had an initial verbal contract with a big ... wares (which never actually materialised), state how you are going to ...Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... it, and examine all the registers. Indispensible for writting code![/QUOTE ... /> Edit: Sorted. Fuse can save .z80, and ZXSP can open them.Background image with SP1 and Z88DKWhat is the prefered way to place an entire (or very large) image in the background when using SP1? Should I convert it to a long (32*24=768 ) list o…
... You can fill in any initial data to the struct manually ... sp1_SetPrintPos() function to fill in initial print position details.
... commands that fill in the initial details at their start, ... code 15 using the initial print state information stored in the ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... to move sprites to their initial position on screen after they ... and it will scan the state of five keys: one each ...MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... ROM.
I would state it is emulation when by ... task for 3.5 MHz Z80.
Fact is that ...Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... I converted
; them to Z80.
; My generators were kind ... PC, but acceptable on
; Z80. Their advantage was their small ... size, but on Z80-assembler they are
; ... , quite a gonzo-routine on Z80. This
; could be considered ...United 93, Even Rumsfield Said they Shot it Down :-[url]http://www.youtube.com/watch?v=x6Xoxaf1Al0&feature=Views&page=5&t=t&f=b[/url]
... thread or click on CornishPasties initial weblink.
But does ... your entire life in a state of paranoia and probably never ...Z80 vs. 8080.[QUOTE=obo]... because 8080 is pretty much just a cut down Z80.[/QUOTE] Really? So what's been cut, and why? Hang on, didn't the 808 evolve from the…
... Saying that 8080 is cut Z80 is misleading.[/QUOTE]
Z80. I only claimed that ... subset of what the Z80 provides (which is kinda ... interrupt mode (equivalent to Z80's mode 0, which ... s also missing the index registers IX and IY, along ...Z80 vs. 8080.[QUOTE=obo]... because 8080 is pretty much just a cut down Z80.[/QUOTE] Really? So what's been cut, and why? Hang on, didn't the 808 evolve from the…
... Zilog's.[/QUOTE]
Agreed! Z80 reads much more naturally to ... the alternate register set the z80 has but the 8080 has ... a handy place to preserve registers somewhere the 8080 code wouldn ...Z80 vs. 8080.[QUOTE=obo]... because 8080 is pretty much just a cut down Z80.[/QUOTE] Really? So what's been cut, and why? Hang on, didn't the 808 evolve from the…
... a handy place to preserve registers somewhere the 8080 code wouldn ... i/o addressing is a z80-only feature as well. It ... explain why a lot of z80 people don't realize 16 ... there were a lot more z80 people about :-DLesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…
... the IY register and HL' registers to have a certain value ... I have written use all registers, for example). Also some basic ... with the interrupt mode and state. BEEP for example will disable ...Lesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…
... the IY register and HL' registers to have a certain value ... I have written use all registers, for example). Also some basic ... with the interrupt mode and state. BEEP for example will disable ...Timex-Sinclair 2068 mod?Just curious, is there any way that a Timex-Sinclair 2068 can be modded to function as a ZX Spectrum128? I'm considering getting one (since it's rat…
... motivated and have a little z80 knowledge. I did maybe a ... />
[quote]
I will state I have no soldering experience ...Nesting NMI'sz80-undocumented (.pdf) page 20/21 [from [url]http://www.myquest.nl/nowind/?q=node/10[/url] ] suggests that IFF1 is not copied from IFF2 if NMI's are…
[QUOTE=bluechip]z80-undocumented [...] suggests that ... is true, then the z80 must have a method ... we would lose the state of maskable interrupt upon ... cleared, IFF2 holds the proper state anyway.
... of doing this, or is z80-undocumented wrong?
[/ ...Nesting NMI'sz80-undocumented (.pdf) page 20/21 [from [url]http://www.myquest.nl/nowind/?q=node/10[/url] ] suggests that IFF1 is not copied from IFF2 if NMI's are…
... means we'd lose the state of maskable INT before the ... . It might look strange but Z80 has really no mechanism to ...The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... TZX browser update with the state of the tape - playing or ... />
The debugger can display registers as 8 or 16bit values ...for a stupid: what?s NMI?erhm, yes, I?m not familiar with it... :rolleyes: I know the function of a hardware ?snapshot? button from Didaktik M/Kompakt, but I?m not familiar…
... means it will cause the Z80 to do its dirty [B ... stack,
[*][B]IFF1[/B] state is saved to [B]IFF2 ... ] flip-flops (these tell the Z80 whether to accept an ordinary ...for a stupid: what?s NMI?erhm, yes, I?m not familiar with it... :rolleyes: I know the function of a hardware ?snapshot? button from Didaktik M/Kompakt, but I?m not familiar…
... a complete instruction (ie the state of the NMI flip flop ... T state of an instruction) whereas BUSRQ can cause the z80 to ...
