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Contended memory and TritoneQuick question regarding contended memory...<div style="font-style: normal;"><br></div><div style="font-style: normal;">I'm testing ideas with Triton…
Quick question regarding contended memory...
I'm testing ideas ... the player code after 0x7fff memory address and the data in ... contended memory, and it doesn't seem ... is being run from non contented memory, so I think it actually ... -
New Spectrum emulator for DS[url]http://zxds.raxoft.cz/[/url] [quote]Features already implemented: * Solid Z80 core - possible bugs aside, the Z80 emulation is as complete…
... ). Apart from the emulation of contented memory and contented port I/O, each ... /> * Full 128k paging support - the memory paging of ZX Spectrum 128k ... -
How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…
... code running in contented memory but about SP pointing to contented memory, so, the ... value must be written to contented memory.
And why the use ... the data about writing to contented memory ?
This is a bit ... -
How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…
... Programm Counter is in contended memory then insert states)
(if SP points to contented memory then insert cycles)
(if SP points to contented memory then insert cycles)
Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…
... the embedded top 32K non-contented memory without a problem.
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... all four T states are contented and which not, not just ... cycle contended according to the memory contention pattern and the other ... gets all cycles contended due memory contention.
Now wait, ... even when there is a contented memory bank paged in? How could ...48k games can be used in 16K?I suppose not but: the games for the 48k can be also used in 48k? Thanks
Some of my games are classified as 16K but will only run on a 48K machine.
The size would say it runs on 16K, but the addresses used are in
non contented memory making it a 48K game.48k games can be used in 16K?I suppose not but: the games for the 48k can be also used in 48k? Thanks
... used are in
non contented memory making it a 48K game ...1K Minigame : 3D RacerLast year I started to code a 3D Racer in 1K. The print of the road was however quite flickery so I put it away to pick it up this week again. I deve…
... version with the game in contented memory didn't work so I ...Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
...
(otherwise no control over contented memory) it almost there. Z80 could ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... to stay away from using contented memory (both for code & data ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... to stay away from using contented memory (both for code & data ...Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …
... /> is dependant on the extra memory of those systems as the ... /> routine does not work in contented memory (lowest 16K of ram) due ... issues of the processor accessed memory
itself.
Added ...Fuzzy Screen On 48k Spectrum.Hi there. I bought a Spectrum off eBay last week (another for my collection lol), and it suffers with a fuzzy screen e.g. it looks like interference …
I think it has a problem with upper non-contented memory (last 32KB).
If you can type on it, try to do a CLEAR 32767 as soon as the machine boots. Then see if it is more stable. Load a 16K game and play a little.Zetr0's Catchup Time (hardware / software)Hello there my fellow ZX'ers I have been soaking myself into the "world of spectrum" and more I do, the more I realize I have to play catchup.... a …
... article about Zx Spectrum ULA Contented memory behaviour (for extreme coding)
Gauging interest: ZX EvolutionHi everyone. First of all I would like to introduce myself, since this is my first post. My name is Conrad, I'm from Vancouver, BC, Canada, and I hav…
... .e. things that designed around contented memory) are off.Gauging interest: ZX EvolutionHi everyone. First of all I would like to introduce myself, since this is my first post. My name is Conrad, I'm from Vancouver, BC, Canada, and I hav…
... .e. things that designed around contented memory) are off.[/QUOTE]
Spectrum real speed testI don't have a real Spectrum, but I have a Romanian clone (HC-91). I always believed it was a perfect clone of Spectrum, but it turned out not to be…
... test does not use the contented memory.
But my Romanian ... appears to have ULA-CPU contented memory, because if I ran the ...Original Derby SpecificationI've scanned an original Derby specification, from Nov 1985, and uploaded it to my site - I think I acquired it during my fleeting association with M…
Thanks for this, Chris.
It's interesting to note that even at this stage, contented memory as documented (pages 4-7) doesn't match what was implemented in hardware (odd numbered pages).
Jon.Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…
... set to point to contended memory still occurs, and also appears ... set to point to contended memory". Is there any precise explanation ... 128K/128K+2 have different contented memory banks from 128K+3/128K ...Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…
... 128K/128K+2 have different contented memory banks from 128K+3/128K ...BIFROST* for graphic artists - part 1Using multicolor requires 2 very different skills: [I]programming[/I] and [I]graphic design[/I]. I already wrote several tutorials about the former …
... you like. However, changing the memory addresses around takes time, so ... with some unused address in contented memory (for instance 23680).
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... the instruction is located in contented memory (address 25000) and, ... according to the contended memory table, trying to access ... to actually start reading this memory address.
memory location 26000, thus finishing ...
