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Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…
... need to work on the memory tester a bit (perhaps steal ... , I have some bad 4116 memory which the simple one doesn ... for testing the routines. The memory test code itself runs entirely in ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... with. (My memory tester's first test is a simple ... an inversion test (i.e. clearing down all memory, then ... memory locations getting influenced). My final memory test is a pseudo-random fill test ... - the entire memory ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... has failed, the memory address being influenced when ... memory locations getting influenced). My final memory test is a pseudo-random fill test ... - the entire memory ... memory. Probably to be thorough, I ought to run this test ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
[URL="http://homepage.ntlworld.com/mark.woodmass/amaurote.csw"]This[/URL] loader works well in contended memory under emulation. I've not tried it on real hardware. -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... [/URL] loader works well in contended memory under emulation. I've not ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
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[QUOTE=Philip Kendall;51298]Memory contention would send your timings ... counts and eventually it was contended memory that was causing the problem ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... counts and eventually it was contended memory that was causing the problem ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... /48kreference.htm"]this[/URL]. The contended memory section is about halfway down ... -
GP2X - Spectrum EmulationHi all. Looking for advice on the GP2X and (especially) the quality of its ZX Spectrum emulation. Has anybody anything to say about the console - is…
... and z80 format bugs, enabled memory contention emulation and added an ... should. It's due to contended memory emulation, which was only half ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... complete your code in contended RAM (which screen$ memory is) while the ... as well. In other words, contended memory is slow only when ULA ... apply to +2A,+3, where contended memory is slow during the complete ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... as well. In other words, contended memory is slow only when ULA ... apply to +2A,+3, where contended memory is slow during the complete ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... apply to +2A,+3, where contended memory is slow during the complete ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... +3 is slower/faster in contended memory than ZX 128k or +2 ... make simple speed comparison of contended memory? Let's say how much ... -
Growing up... Jasmin supports 128/+2 nowHi, all. New version of Jasmin is available (v0.11). It supports ZX Spectrum 128 and ZX Spectrum +2 models. Try it [URL="http://www.dustedpixels.co…
... detailed information on what is memory and I/O contention in ... when reading/writing to contended area of the memory - it does not ... place when writing to non-contended memory areas.
I'd ... -
Growing up... Jasmin supports 128/+2 nowHi, all. New version of Jasmin is available (v0.11). It supports ZX Spectrum 128 and ZX Spectrum +2 models. Try it [URL="http://www.dustedpixels.co…
... you get contention only for contended memory, and why you can get ... of which are accesses to memory in the traditional sense.
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... memory, each model only gets one contended memory fetch during each eight cycle contended ... terminated. So, when running in contended memory, the 48K/128K ULAs still ... see a contended memory address sitting on the address ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... interrupt to the start of contended memory), so anything less than a ...The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... their keyboard profile
- Fixed memory contention for +2A/+3 models ... , I'll probably leave precise contended memory emulation as optional for 1 ..."Add Watch" Debug for EmulatorsHi, I am working on completing a JSW-style game that I started in 1991. Although programming using TASM and Spectaculator is far easier than on th…
... bothered about the emulation of contended memory. Nice one mate.New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... .e. 3.5hz but no contended memory)
[/QUOTE]
Yes, and ...Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... -initialization-grief is the ROM memory test is very simple, and can ...How about making a diagnostic program for 128k speccys?Hi guys, I was just chatting with DEATH today about a problem i had with my 128 heatsink spectrum and the need for a 128k speccy diagnostic program …
Ok, that looks about right - should be easy then to set up a normal 48K environment, test all ram with Geoff's program, page the memory, test top 16K, do again til all ram checked.
That you Mr Andrew.Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... 209893]In many cases, if memory is faulty, this routine won ... it's not a thorough memory [b]test[/b], but I think ... . The tedious and largely pointless memory test sequence performed by PC BIOS ... been required to write a memory testing algorithm that can accurately ...Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... it's not a thorough memory [b]test[/b], but I think ... The tedious and largely pointless memory test sequence performed by PC BIOS ... a brief test - testing merely for the presence of memory could be ... repairer).
To test whether RAM is present at ...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…
... A total of 6 contended T-states in every 8 ... out of every 8 are contended, but for the IO ... [I]before[/I] the contended memory T-states. See [url] ... fetch when doing a contended IO read of the ... that T-state is contended by the memory contention!!)
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…
... that there's no real contended memory information in there, so it ...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…
... that there's no real contended memory information in there...[/QUOTE]
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... hard drive for a while:- "Memory Test"
[url]http://www ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
[QUOTE=Digital Prawn;215356]"Memory Test"[/QUOTE]
I only ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... I have more suggestions for "Memory Test":
a) At the ...
