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Tips on (dis-)assembling Z80 instructionsedit: Naturally I managed to post this in the wrong forum. I'd much appreciate it if any moderator would move it to the development section. For the…
You should check out the native z80 disassembler written in less than 2k on Geoff's page: [url]http://www.wearmouth.demon.co.uk/board.htm[/url] -
Tips on (dis-)assembling Z80 instructionsedit: Naturally I managed to post this in the wrong forum. I'd much appreciate it if any moderator would move it to the development section. For the…
... than 2k on Geoff's page: [url]http://www.wearmouth.demon.co ... -
ZX81 ROM - GPL / source code?I've had a quick look around but can't find the original thread, if any. There are various mentions of the ZX81 ROM being released under the GPL, and…
... . I understand from Gasman that Geoff has given his blessing for ... assembly file ([url]http://www.wearmouth.demon.co.uk/[/url]) to ... documentation to that effect. Perhaps Geoff would care to comment. -
Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …
[QUOTE=Geoff;389453]Oh dear,
I ... program
[url]http://www.wearmouth.demon.co.uk/gw03/endgame ... though.
[url]http://www.wearmouth.demon.co.uk/gw03/queens8 ... [/url][/QUOTE]
No Geoff, the Eight Queens program is ... -
Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
[QUOTE=Geoff;405102]That reminds me that ... .
[url]http://www.wearmouth.demon.co.uk/lflipi.gif ... -
Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
[QUOTE=Geoff;405102]That reminds me that ... .
[url]http://www.wearmouth.demon.co.uk/lflipi.gif ... -
Microdrive Games CartridgeI've just noticed that Ant Attack on the microdrive [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0014815"]Games Cartridge[/URL] (also bundl…
... /> 1983
[url]http://www.wearmouth.demon.co.uk/srlintro.zip ... /> 1984
[url]http://www.wearmouth.demon.co.uk/srintro2.zip ... />
Best Wishes
Geoff. (trying to keep warm) -
Tape I/O in z88dkAccording to the documentation, z88dk appears to have facilities in its spectrum-specific library for tape i/o - [url]http://www.z88dk.org/wiki/doku.…
... up at Geoff's online disassembly: [url]http://www.wearmouth.demon.co ... -
Detecting ZX Interface 1 ROM VersionIs there any way of checking which version of the ZX Interface 1 is present? I know that the later ROMs were better at networking - what other impro…
... of the two versions at Geoff's site. Scroll to near ... bottom of [URL="http://www.wearmouth.demon.co.uk/"]this page ... -
Interface 1 Issue 2 Bug FixesI've had a bit of spare time today and implemented Geoff's [URL="http://www.drumfu.com/if1_2p.zip"]bug fixes[/URL] as detailed in his [URL="http://ww…
... spare time today and implemented Geoff's [URL="http://www.drumfu ... in his [URL="http://www.wearmouth.demon.co.uk/if1_2.htm ... -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... covered in further detail in Geoff's excellent Interface 1 disassembly ... B Channel [URL="http://www.wearmouth.demon.co.uk/if1_2.htm ... [/URL] and [URL="http://www.wearmouth.demon.co.uk/if1_2.htm ... [/URL] and [URL="http://www.wearmouth.demon.co.uk/if1_2.htm ... -
Hardware and software on ebayPicked up a few issue 1's and i found an issue 2 with them so put it on ebay. Not like any issue 2 i've ever seen [url]http://cgi.ebay.co.uk/ws/eBay…
[QUOTE=torot;549517]geoff, do me a favour and ... URI data string "http://www.wearmouth.demon.co.uk/" -
Nightime Adventures :)Last night I stumbled upon a bloke trying to tip an entire bag of cement down the outside toilet of a pub. He scarpered pretty quick across the car…
[QUOTE=Geoff;580716]I can do that on a Spectrum
[img]http://www.wearmouth.demon.co.uk/gp32.gif[/img]
:-)[/QUOTE]
That's [i]BETTER[/i] than Teletext :o
:D -
ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …
... ?
[url]http://www.wearmouth.demon.co.uk/SFT/soft02 ... ://www.wearmouth.demon.co.uk/softrom.htm[/url]
(thank Geoff ... -
ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …
... ?
[url]http://www.wearmouth.demon.co.uk/SFT/soft02 ... ://www.wearmouth.demon.co.uk/softrom.htm[/url]
(thank Geoff ... schematic
[url]http://www.wearmouth.demon.co.uk/SFT/soft02 ... -
Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
... found over at Geoff's [URL="http://www.wearmouth.demon.co.uk ... -
New ZX Spectrum emulator for Jupiter AceProject page (sorry in Spanish) [url]http://retrolandia.net/foro/showthread.php?tid=36[/url] Try it in a Jupiter Ace emulator [url]http://jupiler.re…
... ROM:
[url]http://www.wearmouth.demon.co.uk/zx82.htm ... would still recommend either contacting Geoff or using the BUSRA assembly ... tokenizer. Or you could ask Geoff to reuse his tokenizer, if ... bad. I didn't realize Geoff hadn't actually put his ... -
Can anyone explain this result?This little sub-routine isn't always doing what it's supposed to; ie. transfer the value from SEED to VARS. Can anyone explain why? I've put in the P…
Thanks to Geoff at [url=http://www.wearmouth.demon.co.uk/]The Incomplete ... -
An odd floating point error. Avoid!While working on the revival of my old game ([url="http://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992…
Geoff's website is no longer at the known address. Have a look at the disassembly on the WayBack Machine here: https://web.archive.org/web/20150630040324/http://www.wearmouth.demon.co.uk/
[b][i]Mark[/i][/b] -
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... /> [ This Message was edited by: Geoff on 2002-07-08 10 ... -
Machine Code Challenge #1 ResultsWell at the stroke of midnight there were 3 entries so everybody gets to stand on the podium and the 3 Spectrum books will be going out to prizewinn…
... /> [ This Message was edited by: Geoff on 2002-07-15 11 ... -
500+ Tapes Plus, Swapping PreferredHere is a long list of current games i want to get shot off. Im after pretty much everything i dont have, please send you dupe list to me, and you wa…
... Panther
Martech
Geoff Capes
Nigel Mansells Grand ... -
Anybody wanna swap ???Send your dupe list or requested to :- [email="cornishdavey@dsl.pipex.com"]cornishdavey@dsl.pipex.com[/email] Quite a long long list, come very co…
... Panther
Martech
Geoff Capes
Nigel Mansells Grand ... -
Updated Swap List, some nice new ones anda lot gone walkies :- And if that dont float your boat, have a look at ebay :- [url="http://cgi6.ebay.co.uk/ws/eBayISAPI.dll?ViewListedItems&userid…
... Eye
Martech
Geoff Capes
Nigel Mansells Grand ... -
Any weight lifting games????Was there any weightlifting games on the good old speccy, the only one i can think of is Geoff Capes and i cant play that game at all, lol, any sugge…
Was there any weightlifting games on the good old speccy, the only one i can think of is Geoff Capes and i cant play that game at all, lol, any suggestions? -
New ROMAlthough commenced in late November, it is only now in the last few hours of 2003 that the "Gosh Wonderful" ROM gw03.rom has attained a release state…
...
[url="http://www.wearmouth.demon.co.uk/gw03/gw03 ... .htm"]http://www.wearmouth.demon.co.uk/gw03/gw03 ... -
ANN: Tipshop updated Tuesday, 06 July 2004Tuesday 06 July 2004 Lots of maps, and some fairly lengthy looking new tips * Added my own POKE for Twighlight Zone (original and re-release versio…
... Rock 'n' Roll
* Geoff Owen created a screenshot map ... -
ANN: Gosh Wonderful ROM new version 1.31All those other version were just leading up to this one - The Gosh Wonderful ROM gw03.rom is a replacement for the standard ROM in emulators that al…
... -
[url="http://www.wearmouth.demon.co.uk/gw03/gw03page ... .htm"]http://www.wearmouth.demon.co.uk/gw03/gw03page ...
