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Retargetting the Z88dkWell, I'm asking here because it's come up before, and I assume someone here might know the answer... I'm trying to retarget the Z88DK for the Z80 b…
... 'd like to build my ROM with the z88dk - essentially ... the often used functions in ROM so that programs in ... of the first 16K page of my ROM as it is ... work if they are in ROM!)[/QUOTE]
I ...
In terms of a ROM, you can "place" static variables ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... better. Next one has the ROM in a socket so you ... that the fault was the ROM all the time, you go ... the address bus. Fine at 16K, but won't initialise above ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... Research Ltd, but only lower 16K only working. Ramtop gets set ... it ALWAYS initialises as a 16K machine, not 17 or 18K ... out at 32768. When the ROM does the initialisation, it writes ... RAM, it's not bad ROM, it's not a bad ... it's fine (as a 16K machine) and that's ... -
Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... registers are saved and some ROM code involved with updating system ... your own im2 interrupt routine that replaces the one in ROM to ... , the ROM routine is totally useless but the custom IM2 one you ... game isn't using an im2 interrupt routine, but is instead ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
How dificult would it be to make a rom cart - a la JetPac etc - which holds a 16k eprom or 8k eprom 8 k ram which then plugs into interface2/ram turb etc?
Could be good for testing speccy ram. -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... , it'll have a Flash ROM chip, and some minimal logic ... connector. Since the smallest flash ROM I've found is 128k ... (paging out the ROM gives you a 16k hole in the memory ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... Ltd, but only lower 16K only working. Ramtop gets ... it ALWAYS initialises as a 16K machine, not 17 or ... 's fine (as a 16K machine) and that's ... fail with BASIC, but the ROM cannot initialize it properly, ... slower access to the lower 16K, so it all points ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... eprom. You can replace the ROM by making an external board ... , so that the on-board ROM never gets selected. Simple decoding ... -
Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... should download the later ROM and burn it to ... Ian Collier's enhanced 16K IF1 ROM and use that ...
I got the rom image and I started searching ... seems even philip kendall's ROM site has a *broken ... * link to instructions about rom.
I ... -
Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... really should download the later ROM and burn it to a ... download Ian Collier's enhanced 16K IF1 ROM and use that instead ... Ian Collier's Interface 1 ROM uses the so called "unused ... -CC so use of this ROM would render your computer incompatible ... -
ResiDOS v2.00 releasedI've just posted a major new release of ResiDOS, at: [URL="http://www.worldofspectrum.org/residos/"]http://www.worldofspectrum.org/residos/[/URL] T…
... means having to reflash the ROM every time any ResiDOS data ... like the Am29F010 all have 16K sectors which can be reflashed ... -
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…
... code itself runs entirely in ROM so as to not ... holes).
The flash ROM can also be programmed by ... that selects whether the Spectrum ROM is paged in on ... used as a general purpose ROM board, an OUT instruction ... in any of the many 16K pages (8 if using ... -
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…
... you could just the testing ROM I "published" (well, made available ... the lower part of the 16K, the higher part, the upper ... -
Timex Sinclair stuff wantedI will pay 500USD if someone can sell me all of the following items: 1 Timex Sinclair 2068 1 Timex Sinclair 2090 command stick 1 " " …
... the differences between the cartridge rom player and the port on ... /1000s, 1 TS/1500, 4 16K packs, some tapes and dozens ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... - for example, in the lower 16K you'll write all 0s ... the inversions test (and my ROM code currently tests four inversion ... -
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 & …
... /> Amazingly that loader works in 16k mode - in which i've ... anything other than the standard ROM loader used :) -
Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... , lower 16K are not used and are shadowed by ROM.
With ... pages and up to 32 ROM pages. Any page can be ... -
Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…
... program it with a testing ROM!) The flash tool allows the ... of any of the 32 16k pages, as well as being ... -
InterfaceHi I'm building a spectrum emulator. I've tried to build it as modular as possible, for example I have a zx class that have input and output devices…
General ROM paging is all done in ... chip in a Spectrum (both ROM and RAM) has what are ... the ROM chip (for addresses < 16384) or the lower 16K bank ... />
Concentrating purely on the ROM, when the Spectrum reads from ... -
TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …
... load very happily into a 16K page on my diagnostics board ... OUT subroutine in the Basic ROM. But otherwise, the flash utility ... up any of the 32 16k pages from a menu. -
TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …
... load very happily into a 16K page on my diagnostics board ... OUT subroutine in the Basic ROM. But otherwise, the flash utility ... up any of the 32 16k pages from a menu.[/QUOTE ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... they stick the game in IM2, which allows a programmer-supplied ... . So instead of running the ROM code you run your own ... you can do without the ROM interrupt.
[quote]
ROM ISR. -
16 or 48k you decideI was wondering apart from the sticky label on the back say 48k and with out being able to see one boot up, if there is any way to tell a 16k machine…
... RAM chips thru the Z80 - ROM "hallway".
That would tell ... the machine was populated with 16K or 48K, regardless of their ... -
Another TS Emu CartLooks like the one I have. [url]http://cgi.ebay.com/TC2068-Cartdrige-48K-emulator-for-Timex-Computer-2068_W0QQitemZ250133271074QQihZ015QQcategoryZ124…
... internal memory in the 0-16k area. Presumably changes were ... to match the Spectrum's rom disable signal which can ... also only disable the 0-16k area.
... the 0-16k area filled in by the Spectrum ROM on ... dock bank into the 0-16k area.
... -
Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... (lower 16K RAM) chip. Occasionally, it can mean the ROM is bad ... -
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…
... in the case of a 16K machine (or a 48K with ... - which could be bad RAM/ROM/Z80 yadda yadda yadda.
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
...
asm("call\t56"); // call ROM isr so basic can coexist ...machine IDs for .z80 snapshotsHi, is there s.o. officially in charge for the .z80 file format? while upgrading zxsp's save_z80 routine i added new machine IDs for the Specci vari…
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0 48k 48k 16k issue 2
1 48k ... br /> Also a custom rom for the TC2048 may ... a +2A with custom rom ... if this was supported ...switchable ROM`sHi all, As I own a few Spectrum and Commodore computers, I am wandering a few years ago on the C64 there was a switchable ROM the normal C64 and a Ji…
... with 4 16K banks. One bank can have the original rom, and ... banks, one for the original rom and another one for the ... who did their own internal rom swtich for the 48K. I ... States the most popular internal rom-switch was the one sold ...Early Version Betadisk Manual (ie anybody have one)Folks, after lengthy excavations in my attic I have dug out my old Betadisk interface and 720K drive. However the manual has done missing. It's wa…
OK the ROM has been uploaded to WOS ... to page in the rom, and it's 16K in size (I ...
