-
Feelin' kinda proud of myselfOkay, it has bugs. But I kludged it together about 10 mins after getting the sprite thing to actually work. [url]http://britlion.googlepages.com/Spr…
... for Mk IV
halt
erase-buffer-redraw like ... crazy
became
halt
wait for a while ... -
Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... the slight speed loss of contended RAM. It loads a number ... -
Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... the slight speed loss of contended RAM. It loads a number ... ROM routine runs, then (possibly contended) RAM should only be accessed ... when loading or saving to contended RAM. And on 16K/48K ... to the lower 16K RAM (contended). On 16K models, that's ... -
ZX Basic 1.2.5 - a BASIC CompilerWell, my old post about ZX BASIC seems to be gone (maybe this phorum purges old threads?), so I started a new one. After more than 6 month, I've fin…
... do three sprites between a HALT and a flicker. That's ... -
IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... longer/shorter due to different contended ram banks on newer/older ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... :
- read port 31 after HALT instruction (or at begin of ... -
Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky
... be able to detect a contended memory access, and will cause ... -
Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky
... in IORQ cycle speed-up contended ports adress (OUT/IN instructions ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... done on a machine with contended screen memory (it requires too ...IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... done on a machine with contended screen memory (it requires too ...Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... Data
0xOFFSET2+1 - 0xOFFSET3 : Contended Memory
0xOFFSET3+1 - 0xFINAL ...Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... + attribute) which is also the contended memory.
32768 to 65535 ...Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... . Quite right. I inadvertently clubbed contended memory with the display memory ...Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... -0x3FFF ROM
0x4000-0x7FFF (Contended) User RAM
0x8000-0xFFFF ... RAM
Within the contended user RAM:
0x4000 ... certain times. This is the 'contended memory'.
The remaining ...48k Timing Tests...Here's v1 of the timing tests for the 48k Spectrum, with a little background [IMG]http://www.zxspectrum4.net/images/timing_test_v1.jpg[/IMG] [URL="…
... failed two tests (12 contended and 27 contended). It had warmed only ...Retro Gaming Love or Profiteering - A DiscussionI'm having a debate on a forum for a popular MAME (arcade emulator) front end (Hyperspin). I'm questioning the ethics of a site called EmuMovies.co…
... 16MBps home connection (which is contended and has only 800Kbits or ...Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... :
- read port 31 after HALT instruction (or at begin of ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... .
Pages 4-7 are contended in that the Z80 and ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... say the same banks are contended so how can that be ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... .
If (HL) is contended, two passes of the loop ... to 50 T for non-contended RAM.
A fairly ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
Hardware is the answer... or not ?
From: [url]www.fruitcake.plus.com[/url]
The RAM banks 4, 5, 6 and 7 (the contended RAM) are formed from IC6 - IC13, whereas the RAM banks 0, 1, 2 and 3 (the uncontended RAM) are formed from IC15 - IC22.CPU speed measure possible?Is it possible to measure the CPU speed and shows the result on a LED display? Micky
... 't run the code in contended memory, and coding a loop ...CPU speed measure possible?Is it possible to measure the CPU speed and shows the result on a LED display? Micky
... direct from Xtal, the other ('contended') one from ULA. We don ...DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…
... something to do with avoiding contended port reads during INI instructions ...Who can fix my Flash programmer code?I have a problem with some code, it doesn't work and I don't have any idea what it's trying to do, or failing to do! The code in question is the fla…
seems being the operative word...
the tape routine is running in contended ram so breaks, but for some reason it worked in spin!
also there are bugs in the flash erase code somewhere, back to the drawing board :)So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... ULA (both VRAM and non-contended RAM), and I'm afraid ... other way, if a non-contended RAM access is to be ...
