Re: [Sam-users] Floppy drive belt

If you found any US suppliers and nobody has responded to you privately then I'm happy to help out; otherwise I'm afraid I can't be of much use. On Sat, 27 Nov 2021 at 12:19, Aleš Keprt wrote: > Dear Sam Coupé friends, > > my Sam floppy drive does not work and I thought it was not possible to >

Re: Pang is amazing

I guess you've all become Facebook people or something? I'll remember to check World of Sam more frequently. On Tue, 13 Nov 2018 at 08:27, Adrian Brown wrote: > Probably  > > > > APB Computer Services Ltd > > Registered Address: 1 Higher Larrick, Trebullet, Launceston, Cornwall. > PL15 9QH. >

Pang is amazing

Having been mentioned as complete only once on this list in passing, and hidden inside of Stars and Sprites, I've only just discovered Pang thanks to a chance visit to World of Sam. It's amazing! Only the resolution difference signals that it's not the arcade hardware somehow hidden inside the

Re: Who are Andrews UK?

gt;> are still struggling to get out to Kickstarter backers), and theC64Mini >> which has come out recently. >> >> Rich Mellor RWAP Software www.rwapsoftware.co.uk www.sellmyretro.com >> >> On 2018-04-13 21:01, Thomas Harte wrote: >>> Per both Wikipedia an

Who are Andrews UK?

Per both Wikipedia and, more convincingly, the UK Intellectual Property Office, they registered the 'Sam Coupe' trade mark in May last year for software and hardware. They also seem to have gone after Jupiter Ace, ZX80, ZX81 and Sinclair Spectrum so it might just be a name grab but they seem

Re: Advice requested

If it's not too far off-topic, is the linked upscaler smart enough not to deinterlace a progressive signal? Even though progressive signals are off-spec for that era of video? I'm also an ex-pat and have found that my TV is perfectly happy with a 50Hz composite signal but its deinterlacing is

Re: who

I have recently been puzzling again on the topic of efficient division as I think I've finally resolved the precision problems that blocked my first-person efforts last time. But I've yet to so much as install an assembler, so that doesn't mean a lot. On 26 November 2017 at 17:38, Andrew Park

Re: OT: Email list about Forth on Sinclair (and Z80) computers

I wouldn't mind seeing those ROMs and circuit diagrams; I'm unlikely to be much help with the documentation. Assuming it's all free for redistribution, of course? On 2 November 2015 at 21:53, Stuart Brady wrote: > On Tue, Nov 03, 2015 at 12:48:09AM +0100, Marcos Cruz wrote: >

Re: Prototype of case for planed new computer SAM COUPE 2

outside of Europe? Or you mean NTSC like a standard 60 Hz computer monitor? From: Thomas Harte Sent: Thursday, April 30, 2015 10:18 PM To: sam-users@nvg.ntnu.no Subject: Re: Prototype of case for planed new computer SAM COUPE 2 With further consideration I'd suggest

Re: Prototype of case for planed new computer SAM COUPE 2

company like Atari with amateur home made product like this Sam Coupe 2. I think even the original Sam Coupe was rather a home made product than a professional computer hardware on the technology level possible in the 1980's. -Původní zpráva- From: Thomas Harte Sent: Tuesday, April 28

Re: Prototype of case for planed new computer SAM COUPE 2

budget. On 28 Apr 2015, at 07:22, Aleš Keprt a...@keprt.cz wrote: AKAIK the hardware sprites are much simpler to implement. I don't know Lynx, but the blitter like you described needs uncomparably faster hardware than a set of hardware sprites. A. -Původní zpráva- From: Thomas Harte

Re: Prototype of case for planed new computer SAM COUPE 2

It reflects poorly on me but Spanish isn't one of my languages. What sort of machine is it? A genuine hardware compatible or just a Pi-or-whatever in a suitable case? How much? When? In what form? Very exciting. On 22 Apr 2015, at 14:59, Andrew Park alp...@ntlworld.com wrote: Interested to

Re: R: R: R: Hi All Sam Users From Italy!

, 46030 San Giorgio di Mantova MN Tel/Fax +39 0376 371059 voip: 0376 1855999 - P. IVA 02048930206 skype: ranma_simon -Messaggio originale- Da: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] Per conto di Thomas Harte Inviato: venerdì 29 agosto 2014 16:46 A: sam

Re: R: R: R: Hi All Sam Users From Italy!

Voltolini (simone.voltol...@tin.it) wrote: Thanks Thomas, I will test it and let you know. Kora Sistemi Informatici S.r.l. Il giorno 31/ago/2014, alle ore 00:17, Thomas Harte tomh.retros...@gmail.com ha scritto: So, it’s slender pickings, but everything I seem to have put on disk with Samtape

Re: R: Hi All Sam Users From Italy!

This list is strictly legal so nothing can be redistributed unless the original authors have given permission. I've got some Samtape snaps of Spectrum software hanging around though; I'll see what's permitted for redistribution on World of Spectrum and get back to you, but probably not until

Re: R: R: Hi All Sam Users From Italy!

...@nvg.ntnu.no] Per conto di Thomas Harte Inviato: venerdì 29 agosto 2014 16:08 A: sam-users@nvg.ntnu.no Oggetto: Re: R: Hi All Sam Users From Italy! This list is strictly legal so nothing can be redistributed unless the original authors have given permission. I've got some Samtape snaps

Re: Bug in game Oh No! More Lemmings

I didn’t own either of the Lemmings titles back in the day so this is quite exciting news. But is there a trick to getting Oh No More Lemmings to work? It doesn’t boot on its own and performing a disk swap from the Lemmings title screen doesn’t seem to get me anywhere... On 17 Aug 2014, at

Re: Retro shows and Sam's 25th birthday

I found this thread on the Retro Gamer site, 'Upcoming Retro Gaming/Classic Computing events': http://www.retrogamer.net/forum/viewtopic.php?f=6t=17231sid=c1d3438d991661ad1afa22f622737505start=345 Nobody seems to have updated the sticky post at the top with anything recent but if you skip to

Re: Retro shows and Sam's 25th birthday

, if it does no collide with any work appointments. You can imagine how desperate I am for a such a meeting – the SAM is too exotic for most Germans, so I am a lone warrior over here… J From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: Monday

Re: Retro shows and Sam's 25th birthday

I’ve never been to one but would definitely try to make some effort if something like this were arranged. There’s a 90% chance it’d be while I’m out of the country but it’d be a good excuse to write something. On 24 Feb 2014, at 13:42, Andrew Collier and...@intensity.org.uk wrote: Hi, I

Re: SimCoupe / Trinity

How do the economics work out on this sort of project? I've seen, for example, $8000 raised on KickStarter for a CP/M machine — http://www.kickstarter.com/projects/2057605091/p112-single-board-computer-kit— but that was just for a new run of a fully designed machine that had been produced in the

Re: SimCoupe / Trinity

Surely design and testing would be the real cost? Plus finding sufficiently many people to justify a PCB run? I'm way out of my depth here, correct me if I'm wrong. I read the Spectrum ULA book so suddenly I feel like a genius. On 3 May 2013 13:25, Leslie Anderson lezander...@gmail.com wrote:

Re: disassembling SamForth

As a slightly younger person (relative to the mailing list for a niche 80s micro, anyway) I'd no concept of the syntax or semantics of Forth until I read your site and a few sources on from that. Would it be fair to describe Forth as the procedural analogue of Smalltalk? I'm thinking specifically

Re: text spooling

On 16 November 2012 10:38, Simon Owen simon.o...@simcoupe.org wrote: For the other ports I was planning to use iconv to do the main transliteration step. Under Linux iconv (part of libc-bin) appears to include the support I'm after. Mac OS X is still using the traditional libiconv, which

Re: Accessing Sam formatted disks through a USB floppy drive

it; this is the first time I've had any means of imaging disks at all so I've not had an opportunity to rescue anything before. Definitely recommended for anybody else in a similar situation. On 24 July 2012 23:20, Thomas Harte tomh.retros...@gmail.com wrote: I've ordered one so I'll report on my

Re: Accessing Sam formatted disks through a USB floppy drive

that isn't already freely available. On 24 July 2012 09:57, Leszek Chmielewski retr...@gmail.com wrote: No, but, read here: http://www.softpres.org/news:2010-02-18 Looks like it supports SAM Coupé. I only do not know if it saves in MGT format. Am 23.07.2012 18:04, schrieb Thomas Harte: Being back

Re: Accessing Sam formatted disks through a USB floppy drive

Being back in the UK for maybe three weeks and having uncovered some old floppies, and having no access to a PC with a floppy drive controller, did anyone try the Kyroflux route? On Thursday, 28 July 2011, Leszek Chmielewski wrote: You're welcome, glad to hear you got your data back. Most of

Re: Good resources for learning about the ASIC?

a working ASIC first, before I can donate mine. LCD Am 10.06.2012 22:52, schrieb Thomas Harte: Maybe we should get some samples sent into the guys at visual6502.org who, despite the name, are attempting to image large swathes of old 8 bit ICs. See http://visual6502.org/donate_hw.html

Re: Good resources for learning about the ASIC?

Maybe we should get some samples sent into the guys at visual6502.org who, despite the name, are attempting to image large swathes of old 8 bit ICs. See http://visual6502.org/donate_hw.html — they seem fine with broken hardware so does anybody have any faulty ASICs? Or spares? Possibly even just

Re: BorderTron 3000 - SAM Coupe Edition

On vaguely these lines, is there any hope of an open source version? It'd be nice to add a native interface to it, FireMonkey having issues as you describe, and I'd also like to tie it in with the little tool I've written for compiling sprites (the shared palette being a reason to integrate the

Re: New SAM Game: The Lost Disks of SAM

I agree with Rob and with the other comments; and I'll add that the slow colouring in of the character to represent lives is a really neat touch. I'm a bit confused about what the enter key is meant to do on the info screen though — it seems to redefine black? On 31 May 2012 13:31, the wub

Re: Quick attempt at a scroller

I've gone with compiled sprites, and decided to ignore sub-byte masking, at least for now. That gave me 18 or 19 sprites until I wrote code to erase them afterwards, which cuts it to a measly 3. Suffice to say, I'm going to look into other approaches for that step; it's taking something like 6.5

Re: Quick attempt at a scroller

That's really encouraging; I'm now obsessed with getting a complete game working at 50Hz and in that context I think even just two or three sprites would do it. The arbitrary 40% came from what was left over in the current demo but it strikes me it's also very close to the amount of time between

Re: Quick attempt at a scroller

...@wdlee.co.uk wrote: It's very cool to see scrolling that quick and smooth. :-) We just need someone to use it in a game now!! Quoting David Sanders dsuzukisand...@gmail.com: On 15 May 2012 11:32, Thomas Harte tomh.retros...@gmail.com wrote: Or, more likely, the sad realisation that I

Re: Quick attempt at a scroller

Or, more likely, the sad realisation that I can't scale the thing to a proper game is fast approaching... For the record, this is it mostly at 25fps, running (essentially) full screen with black guttering to hide the edge jittering of yesterday:

Fred 58: Sam Coupe book?

I've transcribed by hand (aside: is there an official transcription or extraction of the various Fred articles anywhere?) Page 5 and about two third of Page 6 of the editorial below. Did anything ever come of the project? The big (BIG BIG BIG) news this month is that FRED will be publishing a

Quick attempt at a scroller

It's exceedingly rough and a pretty simple effect that I'm sure has been exploited a hundred times before but I thought I'd throw it up as is as my part in maintaining the fantastic momentum we've had lately. http://www.clocksignal.com/dropbox/scroller.dsk It's explicitly not a mere demo effect;

Re: XOR now completed!

I'm not sure I understand the game correctly. • either the replay function doesn't work correctly, or it doesn't do what I think it's meant to. Having just failed miserably to complete the first level I let it give me a replay but if you believe that then I never switched shield, spent a lot of

Re: XOR now completed!

/04/2012 23:39, Thomas Harte wrote: I'm not sure I understand the game correctly. • either the replay function doesn't work correctly, or it doesn't do what I think it's meant to. Having just failed miserably to complete the first level I let it give me a replay but if you believe that then I

Re: XOR now completed!

play it.  Looks good!  Is it in Mode 4? On Tue, Apr 24, 2012 at 8:21 PM, Thomas Harte tomh.retros...@gmail.comwrote: I played it for five minutes and it all looked very impressive. That being said, I don't actually know the original game so I was quite lost. Looking at the incredibly sparse

Re: Nyan Cat

graphics is already finished, so I look forward to your music. :-) I wanted to ask for help the people who did music for some other 8bit conversion(s). Aley From: David Sanders Sent: Tuesday, April 24, 2012 10:59 AM To: sam-users@nvg.ntnu.no Subject: Re: Nyan Cat On 23 April 2012 21:34, Thomas

Re: Nyan Cat

I guess it was easy to put in something like an optional shift right by three to compose scan line number and column number when fetching attributes, hence to allow Mode 1 and 2, but would have been harder to have alternative attribute interpretation logic? I'm unsure why they decided to go bright

Re: Nyan Cat

April 2012 16:41, Ian Collier ian.coll...@cs.ox.ac.uk wrote: On Tue, Apr 24, 2012 at 04:16:28PM -0700, Thomas Harte wrote:                                                  I'm unsure why they decided to go bright + flash in the Spectrum, to be honest. Was flashing a must have feature of the 1982

Re: Nyan Cat

freedom to pick any two of sixteen colours. But what do they say about hindsight? On Tue, Apr 24, 2012 at 6:41 PM, Ian Collier ian.coll...@cs.ox.ac.uk wrote: On Tue, Apr 24, 2012 at 04:16:28PM -0700, Thomas Harte wrote:                                                  I'm unsure why

Re: XOR now completed!

I played it for five minutes and it all looked very impressive. That being said, I don't actually know the original game so I was quite lost. Looking at the incredibly sparse World of Spectrum inlay scan though, I think I'm meant to work things out for myself? On 24 April 2012 18:00, Balor Price

Re: Nyan Cat

If it's for some sort of quick attempt at multipart megademo (albeit with all the parts being extremely similar), would it be safe to assume that someone [else] is working on the music? I'd love to be able to contribute but music is completely beyond me. Re: Aley's comments on a 4bpp 64-byte

Re: Musics

The best idea I've come up with is to use a very limited number of tiles and scroll like one of those infinite ball demos. So, you have 8x8 tiles and 8 screen buffers. You scroll only either 1 or zero pixels at a time, only ever in one direction. Assuming it's a right to left scroll, for each

Re: Musics

If I dare jump in, I'd phrase it the other way around. The source media is the authoritative copy; hacks and cracks are the compromises. On 20 April 2012 13:48, Aleš Keprt a...@keprt.cz wrote: Yes, but these compromises are needed for 1 disk of 100, while 99 of 100 do work with DSK. So if

Re: Musics

Attempting to vote takes me through to a blank page -- is that what you saw? On 20 April 2012 18:16, James R Curry 8...@itdoesntsuck.com wrote: It's a Wiki about the Sam world but has some disk images hosted which I believe you can access from their product pages. It also has broken polls.

Re: ZX Spectrum 'relaunch'

For the purposes of debate, I think the counterargument would be that a software approach is inherently more portable and so more maintainable and more suited to a wide audience. Furthermore, there's no automatic advantage to doing things in hardware, given that these systems are fully

Re: Weird caps lock behaviour

I'm not a Windows user so am unable directly to comment, but is SDL or some other cross-platform library possibly contributing to the confusion? Here in Mac world the caps lock key is a special case. It sends a key down when caps lock is engaged and a key up when caps lock is disengaged. That was

Re: Junk mail

Well that's an email I hadn't spotted. And there's a difference between being a troll and reacting badly in an argument but I certainly wouldn't want to be Roger's defence counsel. On 6 April 2012 14:00, Wayne Weedon wa...@fdos-design.com wrote: On 06/04/2012 21:16, Tommo H wrote: I received

Re: SAM HAM viewer

: 4/3/2012 2:43 To: sam-users@nvg.ntnu.no Subject: Re: SAM HAM viewer On 2 Apr 2012, at 23:58, Thomas Harte wrote: I think that used a tight loop of something like (i) load next palette index, next colour and next delay length; (ii) push colour to palette index; (iii) perform a busy loop

Re: Junk mail

He did the skull animation that Aleš posted about just recently, didn't he? Which is a tape file of a 25 fps animation that a suitably accelerated emulator — such as ASCD — can play as a video. On 5 April 2012 11:52, James R Curry 8...@itdoesntsuck.com wrote: Or the 14 disk collection of screen

Re: SAM HAM viewer

I've seen something similar on the Atari Lynx, which also has a 4 bit frame buffer, the only difference being that I think that used a tight loop of something like (i) load next palette index, next colour and next delay length; (ii) push colour to palette index; (iii) perform a busy loop of the

Re: Dave Infuriators

its just collections of random source files ;) -Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 15 March 2012 02:30 To: sam-users@nvg.ntnu.no Subject: Re: Dave Infuriators Any chance of joining the GitHub gang

Re: Dave Infuriators

Any chance of joining the GitHub gang (or any other online repository) if you've got code you're generally sharing? I've finally been motivated to start commenting my 3d stuff properly. Andrew's great work sort of makes me want to try to break out of my comfort zone and try some 2d and I'm

Re: ASCD 0.98 WIP 1 - new version of the emulator available

I don't use Windows so was mainly going along to see if you still release source, but from here the only entry your page shows for ASCD is ASCD 0.96 [11.09.2002] (binary: 311KB, source: 128KB). So I'm not sure if there's a caching issue or something else at play? Also, since the Spectrum is an

Re: Emulation etc...

Per http://www.raspberrypi.org/forum/general-discussion/some-very-good-audio-news : ... you will be able to deal with two high-quality audio streams, one via HDMI and one through that jack So it's implied there's a completely separate audio route that goes to the 3.5mm jack output, unrelated to

Re: GitHub and a polygon filling routine

Mine was mostly being lazy, so I don't have to managing separate source archives for each binary release. Having thought about it, and especially comparing my stuff to yours, I think I'm also going to use the excuse of it being public but not fixed to put some serious time into cleaning and

GitHub and a polygon filling routine

Quite probably not of any particular interest to most of the group since it's mostly a rehash, but because I'm about to spend quite a lot of the year country hopping I've slightly selfishly started dumping a whole bunch of my old projects onto GitHub as a kind of free backup. That means that you

Re: Single pixel hardware scroll?

e.g. the mostly invented black scan lines a lot of them like to insert. On 2 Feb 2012, at 10:24, Geoff Winkless sam-us...@geoff.dj wrote: On 1 February 2012 20:42, Simon Owen simon.o...@simcoupe.org wrote: On 01/02/2012 20:07, Thomas Harte wrote: I notice that whatever effect it thinks

Re: Single pixel hardware scroll?

Owen simon.o...@simcoupe.org wrote: On 2 Feb 2012, at 10:43, Thomas Harte wrote: emulator authors tend to be quite parochial and superstitious about this stuff for some reason, hence e.g. the mostly invented black scan lines a lot of them like to insert. I find a partial scanline effect helps

Re: Single pixel hardware scroll?

a) tell the difference between a normal address request and an ASIC request Is the z80's MREQ line available to peripherals? I forget whether that's active during refresh cycles but it would probably give the game away. Alternatively, the WAIT line probably gives something of the game away.

Re: Single pixel hardware scroll?

in the internal 256 kb, and then you'd be able to use the other 256 kb for hardware scrollable screens. On 2 February 2012 12:47, Thomas Harte tomh.retros...@gmail.com wrote: a) tell the difference between a normal address request and an ASIC request Is the z80's MREQ line available to peripherals

Re: JAM Assembler 1.13 problems?

I was too young to appreciate it at the time but I think Fred had a great series on assembly and the Sam that flowed into the sort of topics specifically of interest to game writers. Has anyone converted those to a modern document format? Other than that I can tell you that z80 questions tend

Single pixel hardware scroll?

I thought this was worth discussing separately but in the JAM Assembler conversation earlier today Andrew Gillan provided a link to http://sam.speccy.cz/ , on which one of the documents is http://sam.speccy.cz/coding/hardware_scroll.txt — which alleges that changing the border rapidly between

Re: New Game - Dave Invaders

I'm not really sure exactly where the age divide falls on this issue and I'm willing to bet none of us is classically young, but yeah! Let's either show them or allow ourselves to be shown, as applicable. I keep meaning to do some Sam work again, but getting started always feels like a huge

Re: New Game - Dave Invaders

I'm also going to out myself as a fan — though it took me about five goes to get to the second screen! As a career non-finisher I also have to agree with Andrew's comments on seeing a project through. My only observation would be that sometimes the collectibles aren't obvious because of the nice,

Re: Floppy drive problem

MGT sold an external interface to allow connection of standard floppy drives, including those used with the Disciple and +D interfaces and pretty much every other home computer - possibly you could locate one of those? It looks like a PC drive should attach. On 19 Jan 2012, at 21:24, Aleš

Re: Power supply circuit diagram

You should sell those; some of us are pathologically incapable of soldering but would love a quiet power supply. On 14 January 2012 09:39, Leszek Chmielewski retr...@gmail.com wrote: No, but my PSU was very loud after few minutes, so I adopted a normal +5V/2A +12V/2A PSU by soldering the SAM

Re: SimCoupe Speed

branch that's moving towards doing that, though there are a number of related complications to untangle first.   One day... Si On 25 Oct 2011, at 13:18, Thomas Harte wrote: I think I'm right to say that external RAM can be paged into the top 32kb of address space. And it's presumably

Re: Resistor R55

for good. That'd be a little sad. On Tue, Oct 4, 2011 at 10:11 AM, Leszek Chmielewski retr...@gmail.com wrote: 2011/10/4 nev young pasiphae1...@yahoo.co.uk On 03/10/11 23:40, Andrew Collier wrote: On 3 Oct 2011, at 16:22, Thomas Harte wrote: It looks like a previous owner of my current SAM has

Resistor R55

My SAM has an intermittent fault involving the 'bright' palette bit having no effect. In reality it seems to be so intermittent now that I'm not sure I still have a problem but nevertheless I thought I'd open the case and clean out any dust, etc, since even my very low level of electrical

Re: Sam Hardware / Software for sale and some disks free

I've wanted to see DRiVER for a while, having read the first three Inside Macintoshes a few years ago and the Smalltalk-80 book a little before that. It'd be interesting to play about with. But how does sellmyretro work? I notice the items listed as bids rather than purchases aren't also on eBay,

Re: Accessing Sam formatted disks through a USB floppy drive

On OS X, which of course has a BSD-derived layer, I wasn't able to get anything using dd — my USB floppy drive showed up as a block device and exposed only the PC-style double density sectors as blocks. I was able successfully to image any disk that didn't use any of its tenth-per-track sectors,

Re: Sam Coupe Testing

Sorry, I don't know most of the answers and am probably not about to be entirely helpful but since there don't seem to have been any other answers... I have replaced the TV lead from inside the power unit, and I get a picture on my TV. However, if the TV is tuned in properly - I get a black

Re: Contention and JR instruction timing.

Apart from a desire for part uncontended memory (ala the Spectrum) and a hardware scroll, a simplified blitter would have been advantageous (eg, give it start address, end address, length, tell it to go and then it replaces the z80 on the bus until the copy is complete; even with the CPU having to

Re: Contention and JR instruction timing.

Umm... Well you can't read and write the same byte in the same cycle; but you're right, if the 79000 frames figure is correct that would be usable. However I'm not sure it is: system clock is 6MHz, so 6M T-states per second, that's 120,000 every frame (6M/50). That's about 30,000 memory cycles

Re: Contention and JR instruction timing.

On Tue, Apr 26, 2011 at 4:58 PM, Chris Pile chris.p...@blueyonder.co.uk wrote: Besides, there's something *pure* about having a chunk of RAM and a CPU - and not much else! While it's pure, and the basis for some of the great machines — the Spectrum, obviously, but also the ST, sort of the

Cables for a composite PAL monitor?

As someone who doesn't care enough about TVs to do anything but accept hand-me-downs and other bits of charity, I've just received an old plasma from work. But the catch is that it's a decade old and is better described as a monitor than a TV, built for the international market. So, in addition to

Re: Cables for a composite PAL monitor?

Yes - lots of those, including two next to the composite video. The screen is comically oversized if anything, and they seem to have taken the opportunity to really cover the thing with inputs... Probably best to get in touch privately and sort this out. I'm finally about to scramble desperately

Re: Dizzy (was:Porting spectrum games...)

not be time effective on a Sam. Have you been using anything like that? On Mon, Aug 2, 2010 at 12:43 PM, Thomas Harte tomh.retros...@gmail.com wrote: It'll be interesting to see how you've done it. If code overhead is an issue then you've obviously taken quite a different approach to me. I

Re: Dizzy (was:Porting spectrum games...)

compile under that) but i think a z80 version would be required. -Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 01 August 2010 12:16 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy (was:Porting spectrum games

Re: Dizzy (was:Porting spectrum games...)

version would be required. -Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 01 August 2010 12:16 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy (was:Porting spectrum games...) As a quick mea culpa, there was a bug

Re: Dizzy (was:Porting spectrum games...)

As a quick mea culpa, there was a bug in my code that means the second set of figures I had were wrong. I'm back to an average 10% and up to 15% worse than Adrian. On Sun, Aug 1, 2010 at 9:37 AM, Frode Tennebø fr...@tennebo.com wrote: On Sun, 01 Aug 2010 10:18:55 +0200, Andrew Park

Re: Dizzy (was:Porting spectrum games...)

Sadly I'm already doing that and still doing a lot worse than you. At this point I'd definitely suggest that if you're willing to donate code then it be used over anything I can come up with. I'm still trying though! On Sat, Jul 31, 2010 at 1:23 PM, Adrian Brown adr...@apbcomputerservices.co.uk

Re: Dizzy (was:Porting spectrum games...)

192 : 9326 (732 bytes worse) 5: 256 x 192 : 10599 (496 bytes worse) Which puts me, on average, about 10% worse than you. On Sat, Jul 31, 2010 at 1:33 PM, Thomas Harte tomh.retros...@gmail.com wrote: Sadly I'm already doing that and still doing a lot worse than you. At this point I'd definitely

Re: Dizzy (was:Porting spectrum games...)

predictors into a big block and LZ77s the whole lot, finding the best window/pattern size afresh for the whole lot). I guess I can look for patterns in the results of the line-by-line search. On Sat, Jul 31, 2010 at 2:04 PM, Thomas Harte tomh.retros...@gmail.com wrote: Oh, but for the record

Re: Dizzy (was:Porting spectrum games...)

-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 31 July 2010 14:31 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy (was:Porting spectrum games...) Oh, but wait! Enabling searching for the best LZ77 window and pattern size (just in terms of 4 bits, 8 bits, 12 bits or 16 bits

Re: Dizzy (was:Porting spectrum games...)

: Thanks, ill have a quick go.  The only thing wil be PNG is a very good format for compression.  Are these colour reduced to sam already or not? Adrian -Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 29 July 2010

Re: Dizzy (was:Porting spectrum games...)

-Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 30 July 2010 11:15 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy (was:Porting spectrum games...) They're 16 colour (quite poorly in one case), but not necessarily

Re: Dizzy (was: Porting spectrum games...)

looking at the Sam again.  Im hoping to get some more time on Sam Uip soon Adrian -Original Message- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Thomas Harte Sent: 28 July 2010 22:31 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy

Re: Dizzy (was: Porting spectrum games...)

Oh, but I haven't actually tested the output stream yet. So for all I know, some error is lurking somewhere making my numbers smaller by accidentally throwing data away... On Thu, Jul 29, 2010 at 7:00 PM, Thomas Harte tomh.retros...@gmail.com wrote: I'll wager you can do better at compression

Re: Dizzy (was: Porting spectrum games...)

Of Thomas Harte Sent: 28 July 2010 00:11 To: sam-users@nvg.ntnu.no Subject: Re: Dizzy (was: Porting spectrum games...) Actually, late night spurt — with Huffman trees it's 5,528 bytes and 6,653 bytes respectively. No predictor yet. The former technically beats the PNG size, but I'd imagine

Re: Dizzy (was: Porting spectrum games...)

for tomorrow night... On Wed, Jul 28, 2010 at 10:53 AM, Thomas Harte tomh.retros...@gmail.com wrote: The previously posted Fantasy World Dizzy map seems to have come from 'Hall of Light', which offers itself as 'the database of Amiga games' at http://hol.abime.net/. You can't just chop up the map

Re: Dizzy (was: Porting spectrum games...)

Further to this: I've been playing around with it today using a couple of the more complicated screens from that Amiga map which didn't feature the watermark (since it's an alpha transparency, causing the number of colours to skyrocket), resized to 256 pixels across (which makes 141 pixels high).

Re: Dizzy (was: Porting spectrum games...)

padding or headers. Or even the palette. On Tue, Jul 27, 2010 at 11:47 PM, Thomas Harte tomh.retros...@gmail.com wrote: Further to this: I've been playing around with it today using a couple of the more complicated screens from that Amiga map which didn't feature the watermark (since it's an alpha

Re: Dizzy (was: Porting spectrum games...)

Tennebø Sent: maandag 26 juli 2010 08:37 To: sam-users@nvg.ntnu.no Subject: Re: Porting spectrum games... On Sun, 25 Jul 2010 23:54:41 +0200, Thomas Harte tomh.retros...@gmail.com wrote: PNG wasn't a leg pull, though I've been unable to find the Amiga map for Fantasy World Dizzy. However

Re: Porting spectrum games...

PNG wasn't a leg pull, though I've been unable to find the Amiga map for Fantasy World Dizzy. However, the entire PC map (256 colour, individual screens slightly too large) is 250 kb as a PNG. So it'd be possible. Animated elements are going to need to be repainted frame by frame so are logically

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