Atari-Forum

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...

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...

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.

Yes.

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 ;)).

Id be interested in one of these masteries!

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

Thanks!

Neat!

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

No you can't, it's not a valid opcode.

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

dogs of war

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...

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)

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...

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.

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)+,(...

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...

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...

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 ...

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...

I dont know how reliable the tool is but; with CE I get these results:

I'd be interested in one of those acsi2sd; incase you decide to start making them!

Awesome orion_, I will look into it! Would you please include the v1 software as well for reference for me?

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.