Search found 341 matches

by wietze
Wed Feb 24, 2021 5:55 pm
Forum: CosmosEx
Topic: So how is your ComsosEx 3.0?
Replies: 3
Views: 201

Re: So how is your ComsosEx 3.0?

I own both versions and enjoy using them both. I experience no real difference in day to day usage. The V3 had an lcd, which is neat, but we'll, it has no real use to me in day to day use. The v1 board layout and make is of a better quality (bar some slight component errors that may require fixing d...
by wietze
Wed Feb 24, 2021 2:30 pm
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 103
Views: 21175

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

It's 2.8x faster than an MCoder style 32 bit 2 plane at once rotating sprite routine. Go line my line using Anima's blitter technique and it absolutely slaughters the CPU. Using a plane at a time 16 bit CPU bit shifter, the blitter has slightly more Bitblit performance than the TT. Im late to the p...
by wietze
Tue Feb 23, 2021 8:17 am
Forum: CosmosEx
Topic: CosmosEX 3.0
Replies: 242
Views: 111192

Re: CosmosEX 3.0

It could also be that the firmware on the chip needs to be reset, and because of that error; any kind of flash/upgrade of the chip in its current state fails. I had this, and you need to revert it to some initial setting first.
by wietze
Tue Feb 16, 2021 11:02 pm
Forum: 680x0
Topic: Devpac debugging tutorial
Replies: 25
Views: 845

Re: Devpac debugging tutorial

Awesome to see people getting into m68k/atari assembly programming! I can recommend the steem debugger as cyprian and Tom mentioned. A bunch of us atari nerd/coders hang out on #atariscne on ircnet and are always ready and willing to provide help or answer questions (as long as we're at the keys ;)).
by wietze
Sun Jan 24, 2021 10:04 am
Forum: Hardware
Topic: New Atari ST/E Mega ST/STE hard disk interface
Replies: 15
Views: 1224

Re: New Atari ST/E Mega ST/STE hard disk interface

Id be interested in one of these masteries!
by wietze
Mon Dec 28, 2020 5:43 pm
Forum: News & Announcements
Topic: Atari ST Birthday celebrations!
Replies: 11
Views: 1185

Re: Atari ST Birthday celebrations!

I enjoyed the other atari books you made, so I'm glad I was still able to order this one!

Thanks!
by wietze
Thu Dec 24, 2020 10:13 pm
Forum: Gallery
Topic: My retro corner
Replies: 19
Views: 1474

Re: My retro corner

Neat!
by wietze
Thu Dec 24, 2020 10:07 pm
Forum: Demos - General
Topic: Merry Xmas ! - Done and Dusted!
Replies: 7
Views: 808

Merry Xmas ! - Done and Dusted!

Hi there fellow atari enthusiast!

Here you find a little Christmas release we've made for the 1mb Atari ST:

https://www.pouet.net/prod.php?which=87618

Best wishes for 2021!
Regards,
Wietze
by wietze
Sun Dec 06, 2020 4:55 pm
Forum: 680x0
Topic: Movem.l
Replies: 19
Views: 1522

Re: Movem.l

No you can't, it's not a valid opcode.
by wietze
Wed Dec 02, 2020 9:39 am
Forum: 680x0
Topic: Movem.l
Replies: 19
Views: 1522

Re: Movem.l

https://sourceforge.net/projects/steemsse/files/ for the altered version (sse) by Steven Segal

http://steem.atari.st/programmers.htm for the original Steem Debugger
by wietze
Sun Nov 22, 2020 4:37 pm
Forum: Games - Requests
Topic: Searching a title
Replies: 4
Views: 392

Re: Searching a title

dogs of war
by wietze
Sun Nov 22, 2020 3:37 pm
Forum: Other emulators & tools
Topic: Atari Portfolio emulation
Replies: 0
Views: 196

Atari Portfolio emulation

Hi there guys, Im looking to test the waters of coding for the Atari Portfolio. I was wondering if there are any means to emulate this machine. So far I have found the portfolio support in MAME, but I have not figured out how to load programs from within the emulator. Does anyone know of other possi...
by wietze
Mon Oct 26, 2020 12:16 pm
Forum: Ym rockin'
Topic: .YM to .mp3 on PC
Replies: 7
Views: 1002

Re: .YM to .mp3 on PC

Whats comes to my mind is the sc68 plugin for vlc;

https://sourceforge.net/projects/sc68/files/ (sc68 plugin)
https://blog.troed.se/2015/10/13/atari- ... n-for-vlc/ (for osx iirc)
by wietze
Sun Oct 11, 2020 2:07 pm
Forum: Hardware
Topic: Atari STe SD card reader on the Extended Joystick Port
Replies: 90
Views: 13103

Re: Atari STe SD card reader on the Extended Joystick Port

I have gone through the sources a few times. In the newest version there are a few things that I find odd (like in the most recent version, some WAIT function is not implemented in read function), but I havent had the chance/time yet to go poking around in the code and give it a try. In the meanwhil...
by wietze
Wed Oct 07, 2020 8:16 am
Forum: 680x0
Topic: Fast sequential reading data and writing non sequentially
Replies: 19
Views: 1674

Re: Fast sequential reading data and writing non sequentially

mrbombermillzy wrote: Wed Oct 07, 2020 7:51 am Im currently doing:

move.w (A1)+,(A0);12 cycles/w
move.w (A2)+,A0 ;8 cycles/w = 20 cycles/word
I am not sure if this works for all situations, because moving to address value also automatically sign extends. So this is prone to error, unless all your addresses in a2 are < $7fff.
by wietze
Wed Oct 07, 2020 5:47 am
Forum: 680x0
Topic: Fast sequential reading data and writing non sequentially
Replies: 19
Views: 1674

Re: Fast sequential reading data and writing non sequentially

Thanks again wietze. Although the examples you provide 'as is' dont beat my initial 20 cyc/word original routine, I CAN actually tweak your first example to (after a certain amount of writes) provide a slightly lower than 20 cyc/word throughput. e.g: movem.l (a2)+,a0/a3/a4/a5/a6 ; 52 move.w (a1)+,(...
by wietze
Tue Oct 06, 2020 7:35 pm
Forum: 680x0
Topic: Fast sequential reading data and writing non sequentially
Replies: 19
Views: 1674

Re: Fast sequential reading data and writing non sequentially

Hmpfz, I guess you got this left then? movem.l (a2)+,a0/a3/a4/a5/a6 ; 52 move.l (a1)+,(a0) ; 20 move.l (a1)+,(a3) ; 20 move.l (a1)+,(a4) ; 20 move.l (a1)+,(a5) ; 20 move.l (a1)+,(a6) ; 20 ;152/5 = 30.4 cycles per rept 5 move.w (a2)+,d0. ;8 move.l d0,a0 ;4 move.l (a1)+,(a0) ;20 ; 160/5 = 32 cycles pe...
by wietze
Tue Oct 06, 2020 7:17 pm
Forum: 680x0
Topic: Fast sequential reading data and writing non sequentially
Replies: 19
Views: 1674

Re: Fast sequential reading data and writing non sequentially

Hi all, Like the title says...I need to read data sequentially from a table, but this data needs to be written in a more random order (not necessarily adjacent data). All the addressing modes (including 020/030) including the more elaborate indirect indexed with displacement/index ones use immediat...
by wietze
Thu Oct 01, 2020 9:20 pm
Forum: Coding
Topic: Best C2P routine?
Replies: 15
Views: 1946

Re: Best C2P routine?

So yeah, it can be hard to further define `best'. Best can be `most ram conservative', or `most general purpose/reusable' or simply `the fastest routine possible'. Generally speaking, the more ram you throw at it, the more speed you can get. But if you need a lot of assets, the ram limitation beats ...
by wietze
Thu Oct 01, 2020 6:29 pm
Forum: Coding
Topic: Best C2P routine?
Replies: 15
Views: 1946

Re: Best C2P routine?

Hi there, interesting question, but before going into details, what criteria determine `best' in your case? Most of the time implementation choices depend on tradeoffs you need to make. Some time ago when I was investigating c2p stuff, I tossed some code together and made it public. Its targetted fo...
by wietze
Tue Sep 29, 2020 8:50 am
Forum: Hardware
Topic: ACSI 2 SD
Replies: 9
Views: 1344

Re: ACSI 2 SD

I dont know how reliable the tool is but; with CE I get these results:
Image
by wietze
Mon Sep 28, 2020 5:29 pm
Forum: Hardware
Topic: ACSI 2 SD
Replies: 9
Views: 1344

Re: ACSI 2 SD

I'd be interested in one of those acsi2sd; incase you decide to start making them!
by wietze
Sun Sep 27, 2020 11:49 am
Forum: Hardware
Topic: Atari STe SD card reader on the Extended Joystick Port
Replies: 90
Views: 13103

Re: Atari STe SD card reader on the Extended Joystick Port

Awesome orion_, I will look into it! Would you please include the v1 software as well for reference for me?
by wietze
Sun Sep 27, 2020 10:05 am
Forum: Hardware
Topic: Atari STe SD card reader on the Extended Joystick Port
Replies: 90
Views: 13103

Re: Atari STe SD card reader on the Extended Joystick Port

I confirm same behaviour on 2nd atari ste; 4mb 1.62 uk tos, clean boot. After loading driver and init sd, in gem, i can read the sdcard but reading A:\
gives no files and 0 bytes. and programs ran from sdcard bomb out.

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