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In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…
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And here's a z80 implementation of a heap:
state of the carry flag), throwing ... -
Spectaculator QuestionsI've been messing around with this great emulator, and was surprised how easy it was for me to load a game from minidisc into Spectaculator as if it …
... me playing back a saved z80 file through Spectaculator so I ... , it can convert your current state (like a snapshot) to a ... -
Spectaculator QuestionsI've been messing around with this great emulator, and was surprised how easy it was for me to load a game from minidisc into Spectaculator as if it …
... , it can convert your current state (like a snapshot) to a ... with short loader, and restore registers.
Making fast-load version ... -
Spectaculator QuestionsI've been messing around with this great emulator, and was surprised how easy it was for me to load a game from minidisc into Spectaculator as if it …
... the sound back on Z80 files or convert them ... play back audio for Z80 files full stop.[/QUOTE]< ... memory/ports/register states. z80 is fine for taking the ... play back sound from a z80 file. Z802TZX and SPIN ... memory state. None of that is present in a .z80 (other ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
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I believe the Z80 takes a minimum of 4 ...
To be fair, the Z80 can handle 16 bit number ... ]
The only Z80 instructions that take 23 t ... involve the IX and IY registers and I'd hope ... register indirect operations on the Z80 take 7, that's ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... some attempts to sort the Z80 vs 6502 argument out? Couldn ... prime number. Both programs (the Z80 and 6502) would have to ... , so maybe the rules would state that 2 should be the ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... some attempts to sort the Z80 vs 6502 argument out? Couldn ... prime number. Both programs (the Z80 and 6502) would have to ... , so maybe the rules would state that 2 should be the ... know a lot more about Z80 code than me from this ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... about CPU efficiency: number of registers.
It can significantly speed ... faster than clock ratio to Z80 shows. On 2.2 x ... exactly same compression algorithm on Z80 and 68000, and it is ... most of job with CPU registers. -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... about CPU efficiency: number of registers.
It can significantly speed ... problem with the Z80 isn't the number of registers it's ... was designed)
It had registers that do this, that and ... a lot of general purpose registers, a load n store architecture ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... are an initial 28 t-states used in the Z80 version ... states if failed on the Z80 and 16 if passed. ... states if failed on the Z80 and 11 if passed. ...
The return on the Z80 takes 10 t-states and ... are optimal algorithms. The Z80 version could trivally be further ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... . Both the 68xx and z80 went into significant numbers in ... embedded applications, the z80 for its entire life and ... good performance out of the z80 requires:
* being ... involves using those zero-page registers. Register allocation is painless and ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... to use the Z80s index registers in speed critical code.
Z80. Even so, there are other ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... never liked to use index registers on Z80 - probably because always had ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... cretin would use the IX registers in a time critical piece ... one I found for the Z80 from a thread on this ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... instructions, saving yourself a t-state on each in the process ... ).
If so the z80 version can be further optimized ... looks less stellar than the z80 seem to be anything that ... pounds main memory. The z80 seems to sag in relative ... -
Microdrive gamesI saw a few Spectrum games on Ebay recently which were advertised as being in the microdrive format, they even had a photo of the cartridge with a la…
... cover the actual software (TZX/Z80 etc) and most have been ... think one or two actually state this. Obviously we adhear to ... -
How are people developing?Are most coding on actual HW or under emulation, or cross developing?
... much. How will it select registers of CPU? Diverse CPUs have ... very diverse count of registers, diverse operations etc.
Z80 assembler with the cross compiler ... to writing the program in Z80 assembler in the first place ... -
How are people developing?Are most coding on actual HW or under emulation, or cross developing?
... press the button and save state to disk, which took about ... to compile C and assemble z80 code from source files on ... -
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…
... generated by all the free z80 compilers out there is really ... vary so much on the Z80.
I'm not saying ... with lots of general purpose registers are another matter. It's ... -
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…
... that this is not the state of the art. I know ... and the complexity of the Z80 register/instruction model makes it ... -
The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... to have a 7 MHz Z80, with a 3.5 MHz ... have been good for the initial 128, as we know Amstrad ... -
The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... to have a 7 MHz Z80, with a 3.5 MHz ... have been good for the initial 128, as we know Amstrad ... -
.z80 to .tap ?Some days ago I discovered that game I have dreamed for so long is actually existing, and it is Bobby Yazz Show, and of course I would like to play i…
... : The bugs are in the z80 page decompressor - it sometimes corrupts ... there too). And not all registers are filled with proper values ... -
Total Worldwide Sales?Does anyone have an accurate source showing total Worldwide sales for the ZX Spectrum (all models, incl. Timex)? I notice the Wikipedia entry for th…
... own copied versions of the z80, dram chips, ROM chips, etc ... if they were available. The state would have had to procure ... -
How are people developing?Are most coding on actual HW or under emulation, or cross developing?
... 4
Assembler: 2500 AD Z80 Assembler V4.05A
Emulator ... early 90s I used LERM Z80 Toolkit, and The Artist 2 ... still does) of writing suspect registers to screen RAM or changing ... -
How are people developing?Are most coding on actual HW or under emulation, or cross developing?
... 4
Assembler: 2500 AD Z80 Assembler V4.05A
Emulator ... early 90s I used LERM Z80 Toolkit, and The Artist 2 ... still does) of writing suspect registers to screen RAM or changing ... -
Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... still in a very early state. I will write the installation ... /> And finally there's always z80 assembler. If you are starting ... of your 2068 or spectrum, z80 is the way to go ... -
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…
... Gerton Lunter's docs for Z80.[/LIST]Flash loading[LIST]
registers accordingly
[*]For custom loaders ... -
Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... only really use them from z80 or using a library in ... into the AY chip's registers directly. For composing music, I ... -
Sam coup? - some questionsHi everyone. Got myself a sam coupé without any kind of cables. I was a bit suspicious about it's working condition. Hooked it to a pc at psu a…
... you what to load the registers with and where to CALL ... `d recommend rewriting for an initial dive in? i.e. is ...
