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Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... but very slow process (the Z80 is even unable to divide ... gave it a try as Z80 machine code implementation, to see ... 255,255 ;In big endian format. This is 2^(2040)-1 ... -
Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... hands on a very nice Issue 3 16K, upgraded to 48K ... bus. Logic levels on the Z80 seem correct. It does not ... real suspect can be the Z80 itself, even if everything checks ... -
32K Expansion board for issue 1 SpectrumI realise these are as rare as rocking horse poo, but I'd really like to upgrade my issue 1 and use it a bit more than is possible currently. Don't …
I realise these are as rare as rocking horse poo, but I'd really like to upgrade my issue 1 and use it a bit more than is possible currently.
Don't mind if it's an original or third-party, or even if it's working.
Thanks!
B -
Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... tonight while fixing a 48K issue 6 board.
Z80 (pretty unlikely). I could ... spurious IO signal from the Z80.
3. Intermittent ULA ... on top of the Z80. It fixes a contention ... transistor. Given an NMOS Z80 (which has much lower ... -
harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... .
I know the z80 isn't designed like this ... possible. (A big issue i think with the z80 but offset a ... -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... memory refresh cycles of the Z80 (performed during each instruction fetch ... = the R register of the Z80
The ULA reads ... -
POGO - loading troubles with DivIDEI am having troubles with loading POGO on my ZX Spectrum. I am using a 48k issue 3. With the DivIDE, the loading screen appears and after that the ga…
... /> I am using a 48k issue 3.
With the DivIDE ... /> I turned it into a .z80, but again, no use.
Sokoban Perfect full version[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0018361[/url] 48k version only, .z80-format :(
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0018361[/url]
48k version only, .z80-format :(DIY Issue 1 Internal 32K RAM expansionFollowing on from the information in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40173"]this[/URL] thread, I finally figured this ou…
... a stripboard version of the Issue 1 internal RAM module.
Issue 1 board are available from ...Sinclair / z80 books (Zaks & Dale)As part of a continuing clear-out, I'm selling the following books, and will accept offers: The Sinclair Story - Rodney Dale (1st edition hardback, …
... condition)
Programming the Z80 - Rodnay Zaks (softback in well ...How to load a +3 dos file from disk to memory in z80Hi all again, Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination? Thanks.
Hi all again,
Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination?
Thanks.Issue 2 with 5C102E + cockroach on eBay(Posted here and not sales as it's not mine :)) Came across [URL="http://www.ebay.co.uk/itm/151225493166"]this[/URL] earlier - early Issue 2 board, …
... /151225493166"]this[/URL] earlier - early Issue 2 board, complete with 5C102E ...CRASH Issue 97Hello, has anybody here got a copy of CRASH Issue 97 for sale? It's the one with the Jetsons on the cover. thanks, Mick.
Hello,
has anybody here got a copy of CRASH Issue 97 for sale?
It's the one with the Jetsons on the cover.
thanks, Mick.Clear command in z80Hi, How would I replicate what the basic clear command does in z80? Do I need to change the stack pointer as well as setting ramtop (23730)? If I se…
... basic clear command does in z80? Do I need to change ...Help with an issue 2Hello friends, Today, sadly, my issue 2 board lost his 5c112 ULA, and on my spares list I only had a 6c one that worked fine after swapping it. Now I…
... friends,
Today, sadly, my issue 2 board lost his 5c112 ...ZX Spectrum 48K board Issue Two - spider modI have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted. [URL="http://www.a…
I have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted.
[URL="http://www.amibay.com/showthread.php?t=57438"]http://www.amibay.com/showthread.php?t=57438[/URL]Format DD disk with samdiskI want to format at windows via usb floppy a DD disk and use it with Disciple or plus D. Can I use samdisk or another utility? Thanks
I want to format at windows via usb floppy a DD disk and use it with Disciple or plus D.
Can I use samdisk or another utility?
Thanks"Z80 chip MUSIC SITE" updatedZ80 chip MUSIC SITE [url]http://z80.i-demo.pl/[/url] has been updated with following 1-bit chiptunes, recorded from real Sinclair hardware: [url]htt…
... [/url]
[url]http://z80.i-demo.pl/Raphael_Goulart-Dancing_frantically_for_about_26_secs ... [/url]
[url]http://z80.i-demo.pl/Mister_Beep-Stellar_Cruiser_Assault ... [/url]
[url]http://z80.i-demo.pl/MovieMovies1-It_keeps_on_beeping_something_Russian ...IF1bis: I give up! WARNING to casual usersI guess the title of this thread really says it all. I have had an IF1bis for a number of months now, and feel that it is time to express my final fe…
... now rather defunct) CF card format, used by most versions of ... of trying to get this issue resolved (including sending my IF1bis ...48k + Issue 3B Power SocketHi All, Trying to get a Issue 3b resurrected that had a faulty power socket. The socket has come away from the board and peeled away some of the tra…
... />
Trying to get a Issue 3b resurrected that had a ...Issue 3 Speccy, Grey ScreenHi, Just purchased a "working" Issue 3 Speccy 48k from Ebay. Except it's not working. All I get is a grey screen, no Sinclair copyright text, no cli…
... />
Just purchased a "working" Issue 3 Speccy 48k from Ebay ...Z80 Asm EditorHi, I think this goes in here but if not then the mods can move it.... :) I have been knocking up a multi-tabbed, customizable docking editor for w…
... docking editor for writing Z80 assembler.
It will ... dropboxusercontent.com/u/77288/Z80%20Asm%20Editor/app_small.png ... dropboxusercontent.com/u/77288/Z80%20Asm%20Editor/app_large.png ... .dropboxusercontent.com/u/77288/Z80%20Asm%20Editor/app_settings.png ...Convert .Z80 to .jarIs it possible to convert a Z80 snapshot to a stand alone Java app that can be used on a mobile? Most of the Spectrum games in the archive have link…
Is it possible to convert a Z80 snapshot to a stand alone Java app that can be used on a mobile?
Most of the Spectrum games in the archive have links to Java apps that can be played online.
Or will I have to use an emulator?Need help: pasmo z80 x-compiler macrosIs anyone here an expert on macros for the Pasmo Z80 cross assembler? I need to know how to write a macro to assemble "DW link", then redefine link t…
... on macros for the Pasmo Z80 cross assembler? I need to ...For Sale: Issue 1 16K S/N 001-000341Extremely low serial number Issue 1 Speccy 16K with fawn keys; [URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=371028018594&ssPageName=STR…
Extremely low serial number Issue 1 Speccy 16K with fawn ...TAPlist - the emulator versionI've got this working reasonably well; there's just a couple of small extra features which I want to add. (Recall that TAPlist writes a formatted lis…
... which supports the TAP file format.
[*]Program occupies lines 9900 ... as well as TAP & Z80 files with the program & ...Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... there before for the Z80 to ignore their values? ... ] case 0x76: /* HALT */
z80.halted=1;
PC--;
[CODE] if( z80.halted ) { PC++; z80.halted = 0; }[/CODE]
format to specifically contain a ...New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... s-video modification on an Issue two 48K Spectrum so I ...New ZX Spectrum/ZX80/ZX81 emulator - ZEsarUXHi I invite you to try my new ZX Spectrum/ZX80/ZX81 emulator: [url]http://sourceforge.net/projects/zesarux/[/url] It's not really new, I began it …
Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... that board.
All issue one boards are designed for ... for best operation.
Issue 4A and later boards are ... take anything earlier.
Issue two is the board with ... although this was made after Issue two ceased production. The quick ...
