Source of technical information

1999-04-26 Thread Thomas Harte
Hi, I have been writing a Spectrum emulator as a distraction and am starting to feel comfortable with the way the ZX Spectrum works. Not that I care too much about the ZX Spectrum, because I had a SAM Coupe! Unfortunately I was too young to know anything real about computers at the time,

Re: comp.sys.sinclair... jesus...

1999-05-08 Thread Thomas Harte
Hmmm... beginning to wonder if I should just do what 99% of people here at MS do -- ignore it all, and just don't get involved in online debates. Hehe - if you work at Microsoft, say 'Hi' to the Mindcraft people for me! -Thomas

Re: comp.sys.sinclair... jesus...

1999-05-09 Thread Thomas Harte
OK, I'm sensing some kind of a 'point' to all this... Maybe part of this Mindcraft group is someone you know, Simon? Just a guess. Or maybe, I being a Linux user was completely bored of the stupid paranoid Linux news sites taking a field day over one duff report (you would have thought

Help with : Writing my first (decent) SAM program . . .

1999-05-13 Thread Thomas Harte
Hi, I received SC-ASM the other day, and being not ill acquainted with z80 assembler and the workings of the ZX Spectrum, I've programmed a few basic things. You know, like pressing different keys activating different border colours and little things like that. I therefore notice that

Re: Help with : Writing my first (decent) SAM program . . .

1999-05-14 Thread Thomas Harte
Erm... No. You probably meant to say four /bits/ (a nibble). Four bytes is 32 bits per pixel? Not likely, on a SAM. The Kaleidoscope wasn't too bad, IIRC... But no programs supported it. Yeah, four bits, absolutely! It was late. And as for the Kaleidoscope, didn't the Newsdisk carry a

Re: Keyboard membranes

1999-05-16 Thread Thomas Harte
I bought my Sam in Feb 1990 - very early on one of the chips went funny so the picture occasionally went black and white. I got this replaced shortly after SamCo appeared and I'd got my v3 Rom. Mine still does that black white thing, and I had it replaced once, back in the day.

Re: Manual

1999-05-24 Thread Thomas Harte
I've got a spare manual here that I could rip up, but if you insist... If you've got a spare manual, I don't suppose you feel like sending it to me? -Thomas

Re: Persona

1999-05-27 Thread Thomas Harte
Has anyone had any dealings with Persona in the last couple of months? I ordered some software 6 weeks ago and still haven't received anything. I've also tried mailing [EMAIL PROTECTED], but haven't heard anything back from there either. He has definitely been about. You know,

Re: Manual

1999-05-27 Thread Thomas Harte
I really want a free browser, written by people who care about it's quality, instead of staying one step ahead of the competition. It's just sad when you can't even view the W3C's site without having to enable override document colours in your web browser. W3C is truly pathetic. Tried

Re: Manual

1999-05-27 Thread Thomas Harte
BTW, if anyone feels like sending me a nice new 21 inch monitor... Well I had one spare, but I was sort of bored so I ripped it up! -Thomas

Getting those encrypted games in a SIM Coupe-able format

1999-05-27 Thread Thomas Harte
Hi, My brand new copy of SAM Elite is sitting mostly unplayed due to the continuing deterioration of my SAM power supply and so on. The disk uses some crazy format, so neither samdisk (the useless gives up on bad sectors or the DJGPP does all sectors but crashes in dos boxes versions)

Re: Getting those encrypted games in a SIM Coupe-able format

1999-05-29 Thread Thomas Harte
Or you could download a copy of the spectrum 48k version, which is basically the same thing Well, yeah, but with the obvious changes that it : a) wouldn't be able to load saved games from .dsk files meaning that any play on my tempramental SAM would have to be

The win32 SIM Coupe

1999-05-29 Thread Thomas Harte
Hi, I know it isn't out or anything, I'm not about to ask something stupid like 'where can I get it', I'm just aware from experience that writing for windows can be an entirely different process to writing for DOS, and therefore creating a windows version will most probably have meant a

Re: Getting those encrypted games in a SIM Coupe-able format

1999-05-29 Thread Thomas Harte
You could always just save a snapshot file instead Does SAM Elite load those, or would I end up using SPECTRE and just owning a copy of SAM Elite for a bit or a laugh. Also : I just realised this morning that the silly cut-down SAM I was thinking of is the SAM Gamestar . . .

A simple Mode-X question

1999-05-29 Thread Thomas Harte
Hi, I've never been too sure about the memory layout of Mode-X and so on, so I am asking one simple question, would it be faster to : a) blit 144 32x27 tiles to a Mode-X screen arranged so as to form a rectangle of 384x324, or b) blit the same tiles to a

Re: A simple Mode-X question

1999-05-30 Thread Thomas Harte
Sorry, wrong mailing list. I promise to not send at least three mails I otherwise would have to make up for it . . . . -Thomas

Re: PC to Sam

1999-06-07 Thread Thomas Harte
Can anyone explain to me how can i transfer dsk files downloaded from the internet vie a PC to a Sam computer?The software needed and any problems I On NVG there are two programs that can do this for you - samdisk and samdsk. Neither has any real advantage when transferring to floppy,

Re: Linux vs. Win32 SimCoupe - must I fight?

1999-06-07 Thread Thomas Harte
Since Si Owen doesn't want to release his sources (I hate him for this), I can't do much and I'm affraid Linux is out for now, since DOS is out too. Hey, Sim Coupe was distributed under the GPL license. If Si doesn't want to surrender the modified source then he is breaking the law, and

Re: The continuing saga...

1999-06-07 Thread Thomas Harte
squabble squabble squabble Linux *squak* *squak* *squak* WIN32, squabble Simcoupe *squak* Linux, Linux GPL squablle, *squak* *squak*! Here is an interesting fact : Si has broken the distribution agreement with which he got the source for Sim Coupe. If you think that is an acceptable

Re: The continuing saga...

1999-06-08 Thread Thomas Harte
Point 1: Oh no he hasn't. He has modified GPL source to produce the development version of SimCoupe Win32. But since he is not distributing a binary of SimCoupe Win32, he is under *no* obligation to release his modifications to the source. Actually I am told there is a binary in

Re: The continuing saga... (enough?)

1999-06-10 Thread Thomas Harte
How come all we ever talk about these days is copyright issues? Strictly speaking that is part of the reason for GPL! The coders want the right to share source again, man. But this isn't the thread for all that. I always thought we were developers - not lawyers. Maybe it's a new trend?

Re: Linux vs. Win32 SimCoupe - must I fight?

1999-06-10 Thread Thomas Harte
Re: the topic - I wouldn't bother if I were you. Wish I hadn't really. Aley seems to have left out an all-important 'yet' from the end of this sentence, probably not intentionally. So you can see how it looks, yeah? You'll notice how 'doesn't want' is also future tense? A win32 Sim

Re: A dumb and ill considered idea

1999-06-13 Thread Thomas Harte
[cut] thinking about one of the posts I read, and it gave me an idea... Actually this is the one consideration that keeps me bothering to even think about writing anything for the SAM since my real machine is far too beyond useful life to make it worth it. Shame really. It is a nice

Some questions

1999-06-13 Thread Thomas Harte
Hi, to aid me in my continuing attempts to write some code that does something interesting, please feel free to answer the following questions : - is LDIR the fastest way to draw sprites to random positions on the screen (random in the same way as random access memory is

Re: Linux vs. Win32 SimCoupe - must I fight?

1999-06-15 Thread Thomas Harte
Frankly I'm amazed you're giving him such hassle. I might have thought you'd actually be pleased that someone was taking the time and trouble to port SimCoupe to your favourite platform. Even more so since DOS compatibility is apparently 'out' as far as windows 2000 is concerned. That

Re: Speccy (TAP) on Sam Coupe, Prince Of Persia

1999-06-25 Thread Thomas Harte
As far as I can remember: Myth, Lemmings, Operation Wolf, Dragon Spirit, R-Type, Rambo III, Turtles II, Exolon, Tetris 2, Rex, Loopz, Hero Quest I+II, Terminator II, Robocop II, Sim City, etc. Just been checking against WoS, and they at least seem happy to distribute all of those

Using my SAM to copy non-SAM format disks

1999-07-06 Thread Thomas Harte
Hi, I have a need to duplicate a BBC style ADFS single density disk, but have discovered that every IBM PC I can find has broken single density floppy disk compatibility, such that none of the physical sector copiers will work. However, I remember picking up a SAM disk magazine

Re: Using my SAM to copy non-SAM format disks

1999-07-07 Thread Thomas Harte
Book Sale in Stratford had them at 1.50. Until I bought them all. Dixons / Currys / whatever seem to be happy to do them from some regular source for £2.50 or £2.00 or something like that . . . -Thomas

Re: Searching for screen converter

1999-07-09 Thread Thomas Harte
Well... A Sam screen file is a plain simple 1, 2, or 4-bit bitmap, with a palette (also storing line interrupt info). A BMP is a horizontally Anyone able to say where the palette comes (before or after) and in what form? -Thomas

Re: Searching for screen converter

1999-07-13 Thread Thomas Harte
PCX is compressed, so it *can* be smaller than BMP. Should save quite a bit with the usual SAM graphics, especially since you are going to need 12 palette changes to go over the single pixel encoding limit. Just by the way (and my reason for posting), you are aware that some PC

PC files to SAM Coup

1999-07-17 Thread Thomas Harte
Hi, I have a couple of utilities that will take a file from a DSK format image file and store it on my hard drive, but are there any available utilities (for my PC - I am aware of a few for my SAM) that go the other way? -Thomas

Opinions on old programs, and locality of former dealers?

1999-07-29 Thread Thomas Harte
Hi, while tidying up a bit today, I discovered that I still have a load of semi-complete SAM stuff I had entirely forgotten I owned. I found the 'boxes' but not the disks for the following : Splat! Pipemania the LERM Spectrum Emulator (SAMTape?) and the

GamesMaster games

1999-07-31 Thread Thomas Harte
Hi, I downloaded some games to try on my real SAM, but on trying some of the GamesMaster games, I was reminded of an interesting phenomenon - on my MGT 256kb SAM, all GamesMaster displayed games consist of nothing but grey rectangles presumably where the sprites are meant to be. Is this a

Home made 256kb SAM expansion

1999-07-31 Thread Thomas Harte
Hi, Having sent it already to the wrong mailing list (although thanks to everyone here for helping me on Mode-X when I made a similar error on a different occasion), I'd like to say: in about 1993 I was due to receive the schematic to make myself a 256kb SAM upgrade, which the

Malcolm the new SAMs

1999-07-31 Thread Thomas Harte
Hi, I understand the tragic circumstances surrounding Malcolm Mackenzie, however just before christmas I spoke to him by e-mail and he wrote I have also found a shop that has about six SAM`s right at the back of his store shed, the only problem with this guy is he wants to make as much

Some SAM scans

1999-08-01 Thread Thomas Harte
Hi, probably of little interest to anyone, but at http://www.btinternet.com/~t.harte/SAM1.jpg you can find a 255kb hardly compressed 72dpi scan of the Dyzonium and Waterworks inlays, and at : http://www.btinternet.com/~t.harte/SAM2.jpg a

SIM Coup� snapshot file formats

1999-08-06 Thread Thomas Harte
Hi, I picked up while flicking through some earlier posts that either : a) someone said a snapshot file format would be nice, or b) someone implemented a snapshot file format If this is b), from where can I get such a SIM Coupé details of the

Re: Bondi Blue?

1999-08-07 Thread Thomas Harte
For other files, I have a program (quickly hacked together in C, most of which should be totally cross-platform except calling the Open and Save dialogue boxes) which can transfer files to and from a .dsk image. I guess I should upload it to mnemotech.ucam.org or somewhere... Do

Re: Password

1999-08-13 Thread Thomas Harte
Does anyone know why Outlook Express will not remember my password. A common windows 95/98 password forgetting problem can be brought down to '.pwl' files in 'c:\windows' (or wherever) - delete your .pwl file (it is associated to whatever name you state in the 'login' window when you

Re: Help: Outwrite!

1999-08-17 Thread Thomas Harte
Does anyone have version one. If so, when you press the edit key does the top line of the screen flash waiting for an input. I seem to remember having a version 1 which did the flashing top line thing. Might be confused, but I am fairly sure. Alas that disk (and most everything else)

Re: SAM Stuff for sale

1999-08-20 Thread Thomas Harte
Famous Five, Witchin Hour, Lemmings, Ore Warz 2 (NEVER RELEASED!), Labyrinth, Bombs Away, Invaders, Muncher, PoP, Quizball, Defenders, bulgulators, dyzonium (which are shareware anyway iirc), batz n ballz, manic miner, eftpotrm, klax, Anybody know which of these I could use with SIM

Persona dead?

1999-08-23 Thread Thomas Harte
Hi, I noticed David L selling a SAM on comp.sys.sinclair, but was under the impression he was currently in charge of Persona. So I went to http://www.persona.clara.net/ to see if it was being closed or anything only to get everybodys favourite error : error 404. So which

Re: SAM DEFENDER

1999-08-27 Thread Thomas Harte
The game images plus some general background information can be found here: Since no-one else seemed to have, I'll just say : thanks for this! Since all my other commercial games are long dead, this will be about the only thing I have that actually works correctly all of the time on my

Graphic Modes Stuff

1999-08-27 Thread Thomas Harte
I've been writing some simplistic ZX Spectrum programs for a bit now, and feel I am ready to move on to trying to write something for the SAM (one of which I actually own). Of course I understand that there isn't any extra complexity in writing for the SAM (at my level) once the graphics

Power Supply Unit Woes

1999-08-28 Thread Thomas Harte
Now that the connection between the end of the power supply unit that plugs into the SAM and the lead that runs from it to the power supply is almost severed anyway, and because I couldn't find anything about it at the SAM Coupé Scrapbook, I am wondering - if I were to cut the wire and

A small SAM upload

1999-08-28 Thread Thomas Harte
though I didn't think anything of it at the time, I receieved when I was younger a SAM disk featuring the Spectrum games Chase HQ, WEC Le Mans and Tetris 2 appearing exactly as they would on a 128kb ZX Spectrum. Also, some old ZX Spectrum emulator appears. Since I have been

Where to find 'Outwrite!'?

1999-08-28 Thread Thomas Harte
To quote Robert Wilkinson I've sent Outwrite! and a Morse code tutor to David Ledbury to place on the Persona site.. But to summarise the thread 'Persona dead?', that web site no longer exists, and probably won't for a bit. So has Outwrite! been uploaded anywhere else?

Re: Who Wants To Be An unnapreciated contributor?

1999-08-29 Thread Thomas Harte
Anybody played vegetable vacation recently? ha ha ha Yesterday actually. Still don't like it, but I found the disk (for which I paid 50p to retrieve from a local shop's bin of cheap disks) suddenly and thought I might see if it still works. Alas it does. Is it really a terrible

Re: Sam's worst ever game? (was Re: Who Wants To Be A... )

1999-08-29 Thread Thomas Harte
Arcade perfect, is it? Does it have the coloured strips? Eh? Eh?! Surely the coloured strips would be the easiest thing to get arcade perfect because of the ease of switching palette entries halfway down the screen? -Thomas

Re: Sam's worst ever game? (was Re: Who Wants To Be A... )

1999-08-30 Thread Thomas Harte
Hehe,... SCADS eh? Ahh, them were the days :)... I was always a bit Hey, if you have SCADS, any chance of uploading a DSK file to nvg to replace the td0? I'm one of the many people who can't use teledisk any more, but I'd really like to see SCADS. -Thomas

Re: Sam's worst ever game? (was Re: Who Wants To Be A... )

1999-08-31 Thread Thomas Harte
But you can... on your Linux desktop. Or indeed any other UNIX, or Macintosh, surely? -Thomas

Re: New hardware for SAM

1999-09-08 Thread Thomas Harte
1. 4MB SIMM - 1/3 2. ZX128 emul - 1/3 3. DMA - 0/3 4. ISA cross- 0/3 5. Interlacer - 0/3 6. Amiga HDFDD - 1/0 7. 28MHz CPU- 0/0 Alright, I vote for 28MHz CPU and DMA . . . -Thomas

Re: New hardware for SAM

1999-09-08 Thread Thomas Harte
Just be glad you don't get Terry Wogan on your Eurovision Song Contest coverage.. yuck! Surely being in America saves you from any Eurovision anyway? -Thomas

Re: SimCoupe/DOS

1999-09-08 Thread Thomas Harte
Secondly, did anyone actually get the source included to compile? Mine kept complaining about missing header files; don't remember exactly which, I'll check tomorrow. You did realise that the SimCoupé DOS releases from Aley only contain as much source as has been changed since the

Re: SAMDSK - a testimony

1999-09-09 Thread Thomas Harte
thus enabling me to experience the sheer joy (irony) of Flash once It isn't that bad if you use the mouse version, I always thought - it certainly speeds things up! -Thomas

Re: SAMDSK - a testimony

1999-09-09 Thread Thomas Harte
It's been a while since I wrote that so, to be honest, I really can't answer any questions about error messages, bugs, or features! Any chance of posting the source? So that some of us can try and fix it for DOS boxes? -Thomas

Spot the error

1999-09-09 Thread Thomas Harte
I've been persuaded that rather than messing about with mode 2 interrupts, since I can on the SAM, it would be better to put the screen into 32768+, get rid of the ROM and use the low 32kb for program and data. Though Andrew Collier did post some example to do this ages ago when I asked

The SCART socket

1999-09-12 Thread Thomas Harte
Is there anything special about the SCART socket that makes it not a normal SCART socket? I've tried connecting it up to a few devices (TVs and videos), but it only seems to produce a blank, black screen. Maybe mine is broken? -Thomas

Re: The SCART socket

1999-09-12 Thread Thomas Harte
Just to say thanks for everyone who posted follow ups. Using the relevant information I've been able to use a regular scart to scart and snip enough of the 'un-necessary' wires to create a fully working lead! I'm probably now only using the composite signal, but if it gets the picture to

Getting MasterDOS

1999-09-16 Thread Thomas Harte
Though MasterDOS doesn't seem to be available for download in an assembled form, I noticed that Andy Wright has made the source available. I've never had / used / tried MasterDOS, but I thought I might so I am wondering - should an assembled version be available somewhere I haven't

Fast booting ROM?

1999-09-16 Thread Thomas Harte
At current, in my development process (using a DOS based package to cross assemble), by far the longest wait is for SIM Coupé to quite finish booting, so I am wondering - is there a fast booting ROM available for download anywhere on the internet? -Thomas

The break button?

1999-09-19 Thread Thomas Harte
I'm busy writing my first SAM Coupé game, and so far the results are encouraging - I have a rotatable spaceship and asteroids that sort of rotate of their own free accord and move about. No gameplay or anything, but I'm only a learner. So I am wondering what I am meant to be doing

Re: Sam's worst ever game

1999-09-21 Thread Thomas Harte
STAX was fantastic - the best freebie game ever, save for Tetris. Anywhere I can get a copy? -Thomas

Re: Re Preamble

1999-09-22 Thread Thomas Harte
I might be able to get a second hand Sam from a friend who is happy to use Simcoupe.. If you have two SAMs but don't wish to run them at the same time, I'll make you an offer for the spare power supply. Though Bob Brenchley has been really nice and sent me a new power supply - SAM lead

Re: Re Preamble

1999-09-24 Thread Thomas Harte
Hey - I never claimed it was anything other than a quick hack And I never claimed it was anything other than deeply useful for non-repetitive purposes (e.g. using those files on nvg which are intended for a real SAM and so aren't DSK files or anything useful like that)!

Re: Teledisk shmeleshmisk

1999-09-24 Thread Thomas Harte
Yes, that's a big problem. I wanted to it too. But I couldn't get Teledisk work. I tried several PC's with no success. My PC supported teledisk fine until I flash upgraded the BIOS. I really wish someone had told me about that! Still, if anyone else has access to a Dell Dimension XPS

Re: Making dsk / sad files

1999-09-26 Thread Thomas Harte
Couldanybody email me the original SAMDSK or point me to it at the ftp? Can't find it on FTP, but I'll send it if you can't get it any other way. -Thomas

Goodbye

1999-10-02 Thread Thomas Harte
Hi, just to announce that I'm winding down all internet activity before I go to university, and so am un-subscribing from this list. I know it won't really matter to anyone, but I thought it polite to say. Anyway, bye. -Thomas

Copyrights and ownership

2002-05-02 Thread Thomas Harte
I was on this list ages ago, and have returned because I am informed it is the best place to find out about the current status of copyright on many SAM products. I stopped using my SAM in 92 or 93, so excuse me if my knowledge of available software isn't quite up to date. Anyway, I notice

Re: Reading Sam Floppies

2002-05-13 Thread Thomas Harte
Alas, neither SamDsk nor SamDisk seem to want to work on my shiney new PC (running Windows XP). Is it just me? Is there another tool out there I'm missing that'll do the job? No, due to extra controls excerted, including DOS programs, by NT/2000/XP the direct hardware access that these

Re: OT: Arch emulators (was RE: Linux Format)

2002-08-16 Thread Thomas Harte
If we're heading off topic anyway, I don't suppose if someone with the magazine could check quickly whether my small emulator, ElectrEm (it does the Acorn Electron) is in there? They don't seem to stock it at local newsagents, so I'm curious. -Thomas

Re: Game engine development...

2002-08-31 Thread Thomas Harte
I realized recently that here on this list (and maybe not on this list), I have access to some of the best and brightest in the game development world. So... any ideas? Ummm, I'm hardly the best or the brightest, and I'm not even in the professional game development world, but I've been

RE: Re: OT: Z-buffering was Re: So long 2002, here comes 2003....

2003-01-12 Thread Thomas Harte
Just like PowerVR's gfx chips with tile rendering, which process the z-buffering for the screen in small blocks and render only what is visible. This is common practice across all modern cards. A hierarchical approach is taken - there is a full z-buffer for all pixels, then a version with

RE: Re: Elite port

2003-01-12 Thread Thomas Harte
I also wonder whether the extra memory would be of particular benefit. Yes, at least if you're drawing in Mode 4. Do you remember a demo called DWC (Dead Wild Cat) by Marc Broster on Fred 50? It drew rotating 3D wireframe objects and usually kept up to 50 fps. He used most of the Sam's memory to

RE: Re: Elite port

2003-01-13 Thread Thomas Harte
From : Andrew Collier [EMAIL PROTECTED] Date : Sun, 12 Jan 2003 17:01:15 + I don't quite see what you're getting at with your descriptions above... However, the way I see it; every byte that you clear costs time. The ideal situation is when you're only clearing bytes which were used in

Re: Re: Dust cover

2003-04-08 Thread Thomas Harte
I picked up one with a second hand SAM, which looks like it was made for the SAM, and certainly fits well enough. There are no labels on it tho, so I'm not sure how official it is. It's made of a greyish plastic material with a leathery texture, and has brown material stitched around the

Attempts at 3d on the Sam?

2008-04-08 Thread Thomas Harte
Hi, I've just discovered pyz80 and am having a fresh bash at some Sam projects. As I'm simultaneously working on a Freescape interpreter for the PC, my thoughts have inevitably turned to 3d on the Sam, even if it means a Freescape-style non-realtime display. I'm therefore curious about

Re: Attempts at 3d on the Sam?

2008-04-08 Thread Thomas Harte
of those (x^2)/4 table solutions reducing it all to a couple of table lookups and two or three adds and subtracts, but dividing looks like it'll eat quite a few cycles. On 8 Apr 2008, at 14:58, Colin Piggot wrote: Thomas Harte wrote: I've just discovered pyz80 and am having a fresh bash

Re: Attempts at 3d on the Sam?

2008-04-08 Thread Thomas Harte
My original Sam only had 256K. And it really annoyed me later on when half the stuff on Fred wouldn't work, without warning. I think Gamesmaster programs were the worst offenders — you'd get the game clearly working, but with a bunch of monotone grey blocks moving around instead of the

Re: Attempts at 3d on the Sam?

2008-04-09 Thread Thomas Harte
have the speed of mode 4 pixel plotting to deal with. So maybe it's [parts of] the line drawing code? On 9 Apr 2008, at 01:49, Andrew Collier wrote: On 8 Apr 2008, at 14:35, Thomas Harte wrote: I know there are some demos with bits of 3d graphics, but I figure that spending 256 kb on getting

Kaleidoscope questions

2008-04-09 Thread Thomas Harte
I've recently acquired a Sam from eBay (correction to my earlier comments: not from Colin — that was a misunderstanding on my part of the actual seller's advert) and it was advertised as coming with a Kaleidoscope. My problem is that having identified which box must be the Kaleidoscope by

Re: Kaleidoscope questions

2008-04-09 Thread Thomas Harte
, this is what my Sam is doing: http://members.allegro.cc/ThomasHarte/temp/Kaleidoscope1.mp4 (about 8.2 mb) http://members.allegro.cc/ThomasHarte/temp/Kaleidoscope2.mp4 (about 8.3 mb) Is that really all that it is meant to do? On 9 Apr 2008, at 20:19, Colin Piggot wrote: Thomas Harte wrote: 1) should

Re: Kaleidoscope questions

2008-04-09 Thread Thomas Harte
and not break it. So I'll probably leave it. Better a Sam with heavy ghosting than one that doesn't work at all. On 9 Apr 2008, at 21:26, Colin Piggot wrote: Thomas Harte wrote: Actually, now that I'm looking really, really closely, I can see some extremely minor variations on the red

Re: Attempts at 3d on the Sam?

2008-04-09 Thread Thomas Harte
Message - From: Thomas Harte [EMAIL PROTECTED] To: sam-users@nvg.ntnu.no Sent: Tuesday, April 08, 2008 3:35 PM Subject: Attempts at 3d on the Sam? Hi, I've just discovered pyz80 and am having a fresh bash at some Sam projects. As I'm simultaneously working on a Freescape interpreter for the PC

Files on nvg without read/write privileges

2008-04-11 Thread Thomas Harte
Hi, I notice that the following files from /pub/sam-coupe/disks/games/ Commercial are given read/write privileges only for 'owner', with 'group' and 'others' being given only execute privileges (so, e.g. the files can't be downloaded): Craft.zip MindGames1Bombed

Tiny little aspect ratio question

2008-05-05 Thread Thomas Harte
Is it correct to say that a 204x192 (204 is approximately 256 *4/5) image on the SAM will occupy approximately the same amount of space on a TV screen as a 256x192 image on the Spectrum?

In pursuit of Dead Wild Cat

2008-05-15 Thread Thomas Harte
As I previously said, and as mentioned in the current Sam Revival, I'm experimenting with 3d on the Sam. At the minute I'm just playing with vector graphics, since they move reasonably quickly, making it easy to observe problems with the algorithms. I'm not doing too terribly (see

Re: In pursuit of Dead Wild Cat

2008-05-16 Thread Thomas Harte
In fairness, I'm not completely comparing like for like in that video. I am doing realistic 3d engine stuff of creating one view matrix to represent the orientation and location of the camera, a separate transformation matrix to represent the orientation and location of the model, then composing

Re: In pursuit of Dead Wild Cat

2008-05-16 Thread Thomas Harte
routine? Dave - Original Message - From: Thomas Harte [EMAIL PROTECTED] To: sam-users@nvg.ntnu.no Sent: Thursday, May 15, 2008 10:48 PM Subject: In pursuit of Dead Wild Cat As I previously said, and as mentioned in the current Sam Revival, I'm experimenting with 3d on the Sam

Re: In pursuit of Dead Wild Cat

2008-05-16 Thread Thomas Harte
Blink wrote: From: Thomas Harte ... dead wild cat demo ... I'm don't remember this demo Where can it be found ? BTW If you need some help with optimizing your (multiply/devide) code. I'm always in for some byte/T-state banging :-) Edwin

Re: In pursuit of Dead Wild Cat

2008-05-18 Thread Thomas Harte
by inlining, but then I'm probably pretty much done unless there's some sort of special tricks for 16bit table lookups that I haven't thought of yet. On 17 May 2008, at 20:39, Dan Dooré wrote: Thomas Harte wrote: It's originally on Fred 50, but not really in the sense that you have to expand

Re: In pursuit of Dead Wild Cat

2008-05-19 Thread Thomas Harte
I'm using a variant on that page's square table method for my 10 bit multiplies (though I always do (a + b)^2 - (a - b)^2), and something a lot like his divide. But my divide is a lot messier. Specifically (in pyz80 syntax): ; ; FIXDIV, works out BC / DE and stores it to HL (all 8.8

Short, short questions

2008-05-20 Thread Thomas Harte
I'm about to finish my lunch break, sorry if I sound slightly short... 1) is there any pattern or logic to the values placed on the bus during interrupts? I guess an equivalent question is: what realistic options do I have on the Sam for catching and processing interrupts? 2) are there any

Re: Short, short questions

2008-05-20 Thread Thomas Harte
While thinking about it during the afternoon, I have decided that since this table is absolutely fundamental to my program (it's part of the table based 2.8x2.8 multiply), I'm just going to centre it on address 0. Then I can cut the ld bc and the add hl, bc. I'm happy to rearrange my

Re: Short, short questions

2008-05-20 Thread Thomas Harte
the first SET instruction at all) Edwin - Original Message - From: Thomas Harte [EMAIL PROTECTED] To: sam-users@nvg.ntnu.no Sent: Tuesday, May 20, 2008 3:03 PM Subject: Short, short questions I'm about to finish my lunch break, sorry if I sound slightly short... 1) is there any

Re: Short, short questions

2008-05-21 Thread Thomas Harte
If you interrupt routine is small, could you not also just switch off the first one or two scanlines of your display, and even grab a few extra cycles out as a result? Or can you not enable and disable the display per scanline? And, yes, I know I'm missing the point with this question, I'm just

Re: Short, short questions

2008-05-21 Thread Thomas Harte
Really it was related to my first question - I was considering the plausability of moving my data table to be positioned around address zero when I wrote the post. And obviously a table that reaches 2kb in either direction from address 0 covers address 0x0038. Tests last night with an older,

Re: Short, short questions

2008-05-21 Thread Thomas Harte
no means of producing interlaced video? On Wed, May 21, 2008 at 3:58 PM, Andrew Collier [EMAIL PROTECTED] wrote: On Wed, May 21, 2008 at 03:16:07PM +0100, Thomas Harte wrote: If you interrupt routine is small, could you not also just switch off the first one or two scanlines of your display

Re: Short, short questions

2008-05-21 Thread Thomas Harte
, Thomas Harte wrote: Literally anything? On many of the machines I have written emulators for, most things are usually completely changeable but some things are loaded internally — especially on any machine that has a variable screen start address. Also, one further question: am I right to think

Re: Interlaced video

2008-05-24 Thread Thomas Harte
There's a timing difference between even frames and odd fields in the syncs generated at the field end. Non-interlaced video essentially sends only even fields. That said, I'm not sure if non-interlaced video was ever an official part of the PAL spec, so perhaps this TV is justified in its

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