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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 …
... /?hcm5rors3mbroey"]JetRocket48K.zip[/URL] is here now that the 48K ... version is comeplete.
Updates ... that
is dependant on the extra memory of those systems ... /> routine does not work in contented memory (lowest 16K of ram) due ... -
repaired a 48K, yay :)I just managed to repair one 48K. After socketing all eight lower RAM chips (hard work!) and replacing few of them, it showed the familiar "Sinclair …
im trying to repair a zx spectrum but there is one thing im confused about..
The 4116 chips have 7 address lines and only 16K memory.....where is the other 32 K memory then? Where are the other 9 available address lines??? -
Where's it all going?[Rerouted from 'Assembler Intricacies' in Development Forum] [QUOTE=Timmy;506104]I don't think we're in disagreement here. As I've said it's a niche…
... us as adults, it is the memory and nostalgiac factor of ... 5-7x as much memory as hand written code, ... demand a lot of memory of their own in ... out of that, joefish is doing something fresh with ... libraries like these are where the community skills get pooled ... -
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 …
... Complete Rom disassembly, this is how zx spectrum ROM works ... article about Zx Spectrum ULA Contented memory behaviour (for extreme coding)
is a russian clone mode, ... mode.
There is also a UlaPlus project, with ... -
Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... notes:
; MEM_KEYS is a memory slot with enough space to ... ; make sure MEM_KEYS is within a 256 byte block ... (_REDEF_smc0+1),a where a is the number of ... - store the new key in memory
[/CODE]
... ; 10t - this is the memory location that you stored ... -
Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... /> I take it that THATKEYPRESSED, is where you put the routine address ... changing, to define which key is being tested (MEM_KEYS being increased ... specific routine & MEM_KEYS is the memory location with each key needing ... -
Time difference for jumps and calls?Just interested (and possibly trying to distract myself from the more pressing problems in my sprite routine) and willing to risk a potentially daft …
... never knew that. Very interesting. Is it the first 1K or ... bytes that are hard-wired. Is this memory faster, kind of like ... />
It's not the memory that's hardwired, it's ... the two bytes from memory to tell it where it's supposed ... -
128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…
... writing to port 0x3ffd activates memory paging. To quote from ... ][/quote]
This is where I got a bit unstuck ... contention handling for IO where a contended memory bank is paged in at ... 0x3ffd is there, other than A14 is low where with 0x7ffd it is high ... -
Your thoughts on Mattel Intellivision consoleI was wondering what people's thoughts were on the Mattel Intellivision console and who has played one either back in the day, or more recently eithe…
... ]
This is my memory of my brother's short ... certain position on the screen where we could stand for hours ... -
Your thoughts on Mattel Intellivision consoleI was wondering what people's thoughts were on the Mattel Intellivision console and who has played one either back in the day, or more recently eithe…
[QUOTE=scunny;558217]This is my memory of my brother's short ... certain position on the screen where we could stand for hours ... -
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…
... main components, including functionality that is in ULA in original ZX ... and ATM features/timings. There is also ScorpEvo with Scorpion features ... ZX timings, so it is compatible with original software as ... e. things that designed around contented memory) are off. -
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…
... contention' option enabled and there is no difference in speed.
contented memory.
But my Romanian ... appears to have ULA-CPU contented memory, because if I ran the ... the video RAM, the speed is lower. -
Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
... Interface2_RC_New_RAM_Tester.htm[/url], IC6-IC13 is the contended RAM, and ... again :( The problem is that the new memory configuration didn't ... (aka I don't know where is the problem). Connected every 4464 ... , but the boot process is still halted with a garbage ... -
New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
... have another question; what is the memory limitation with SpecBAS? What ... the memory pool of this array is 64kb), and the memory array is ... 1
where 1 means create the memory pool, and 0 ... (where x is the location to store the first byte of memory, ... -
New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
... ]Thanks for this, Dunny, but is there an archive of programs ... -
ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…
... The main CPU is clocked faster, there is more RAM ... And of course, there is also the downside. You have ... pre-selected keyboard option is fantastic and I do ... processing power (and this is purly selfish) would ... a 256K Spectrum where the extra memory is used as an ... -
zx81: is there a 16kb ram limit for basic?first of all, sorry to all about posting a question about zx81 in a forum mostly about zx-spectrum - i didn't want to offtopic questions here anyway,…
... round it is keep checking where the d/file is in memory then when ... -
Malcolm Kirk's Crap Games Corner !To celebrate the Speccy's birthday, my brother has released to the world some of his crap games which he wrote years ago.... You can download them f…
... , and all we have left is our memory, which doesn't always ... " games from many years ago where created with a lot of ... crap because whoever coded them is lazy or not talented at ... crap from the Spectrum past is, sometimes, worth more than the ... -
How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
It is contended. It's on the main low 16K RAM chip, so it is contented. The ULA will always have priority when dealing with such memory, so potential reads and writes may be delayed. -
How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
[QUOTE=na_th_an;623188]It is contended. It's on the ... is contented. The ULA will always have priority when dealing with such memory ... of higher up in the memory.[/QUOTE]
Another mistake ... -
What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …
... is limited by both memory and cpu. There is a point where adding more memory ... The spectrum is in the area where it is limited by both ...
One last caveat :- bankswitched memory is hard to deal with; it ... is not easy like a flat memory model. The ... -
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…
... snow when I is set to point to contended memory still occurs ... to point to contended memory". Is there any precise explanation about ... 128K/128K+2 have different contented memory banks from 128K+3/128K ... -
What should my next Youtube compilation be?I've done Havoc 1, Havoc 2, and Air Crahses [url]http://www.youtube.com/watch?v=vyShPmfFcfc[/url] [url]http://www.youtube.com/watch?v=AyzkL9FtXJk[/u…
Booty! :)
Isn't there a bit in Booty where you open a door and you drown when water fills up the screen? Or is my memory going a bit weird? -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... That is the internal memory description. The BEU is an external memory banking ... specific bank. Bank#0 is internal memory (HOME/EXROM/DOCK) and ... can exist in the 64k memory map simultaneously. Whether the ... colours per pixel mode where the two bits fetched ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... possible with the internal memory of the FPGA.[/QUOTE ... run in time with where the ULA thinks that ... this. However, my design goal is different).
... exactly in sync with where the electron beam would ... The DVI out buffer is the memory that will be actually ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... machine :-) (Incidentally this is why the Spectra only ... run in time with where the ULA thinks that ... this. However, my design goal is different).
... exactly in sync with where the electron beam would ... DVI out buffer is the memory that will be actually ... -
Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…
... the first thing to do is replace all electrolytic capacitors. 30 ... , -5, +12V, place to check is on 4116 RAM IC's ... tests to determine if/where what upper memory chip(s?) are failing ...
