http://www.sarnau.info/ 2012-02-05T17:09:50-05:00 http://www.sarnau.info/ http://www.sarnau.info/lib/images/favicon.ico text/html 2011-10-09T20:44:47-05:00 mfritze http://www.sarnau.info/start?rev=1318207487&do=diff Apple Macintosh Here is a small overview of projects on Mac OS I was/are working on: * while working for Emagic/Apple * MainStage I am the Sr. Software Engineering Manager for MainStage, MainStage lets keyboardists, guitarists, and other musicians perform with software instruments and effects through a full-screen interface designed specifically for the stage. * Logic Pro The industry-leading application for music creation and audio production dramatically broadens the capabilities o… text/html 2011-07-22T14:53:07-05:00 mfritze http://www.sarnau.info/atari:protection_turrican?rev=1311360787&do=diff The boot sector starts quite interesting: copying code to address 8 and executing it there. The format of the disk is different, but not special: sector 1 in the track is 512 bytes long, sector 2-6 are each 1024 bytes long. 5632 bytes per track out of possible 6250 bytes, pretty good capacity on a double sided disk. The trick is that the last 1024 byte sector starts at the end of the track and extends for more than 500 bytes over the index marker. The first sector is packed right after the secto… text/html 2010-12-21T14:59:52-05:00 mfritze http://www.sarnau.info/australien:australien?rev=1292961592&do=diff In November/December 2002 I enjoyed 9 1/2 weeks traveling through Australia. The trip was booked via <http://www.kangaroo-tours.de>. The Mike Ball expedition was booked via <http://www.diversionOZ.com>. Both are highly recommended by me! Here are a bunch of pictures from the trip text/html 2010-12-21T14:57:44-05:00 mfritze http://www.sarnau.info/trips:trips?rev=1292961464&do=diff Here is a collection of the trips I've taken in the last years. Most travel reports are in German. * Halaveli (Malediven, Ende August/Anfang September 1995) * Safari Tour mit der Orca (Malediven, Anfang Februar 1996) * St. Pauls Bay (Malta, Anfang März 1996) * Safari Tour mit der Flying Fish (Malediven, Mitte September 1996) * Utopia Beach, El Quesir (Ägypten, Anfang März 1997) * Soneva Fushi (Malediven, Mitte September 1997) * Maayafushi (Malediven, Mitte März 1998) * Banyan Tr… text/html 2010-10-18T21:09:31-05:00 mfritze http://www.sarnau.info/atari:protection_colorado?rev=1287450571&do=diff Another simple one: it reads track 0 and searches between byte $18 and $97 (128 bytes) for $A1,$FE,$??,$??,$01, which is the sector header of sector 1. I don't really see the value of this protection? text/html 2010-10-18T19:16:53-05:00 mfritze http://www.sarnau.info/atari:protection_brataccas?rev=1287443813&do=diff The protection is also simple: track 81, sector 20 has to contain at least 71 times 'JAKE' at the beginning. It then reads sector 1 in track 5, which has to have a CRC error in the data block (the FDC status has bit 3 set, but not bit 4). Interesting, but not a protection is the boot sector. Michael K. Glover had some fun with it: text/html 2010-10-13T15:57:48-05:00 mfritze http://www.sarnau.info/futura_aquarium_computer?rev=1286999868&do=diff PRINT "Anfang..." ;Speicheraufteilung: ;0000h-1FFFh 8K EPROM ;2000h-27FFh 2K RAM ;4000h Uhrenchip mit 4 Bit Registern ;4000h : Register lesen (0Fh = Fehler) ;4001h : Register wählen ;4002h : Register-Schreiben ;Register: 4,5: Stunden (BCD); 2,3: Minuten (BCD); 0,1: Sekunden (BCD) ;6000h Keyboard-Spalte auf 0 zurücksetzen. Zeilendaten mit IN A,(00h) abfragen ;8000h Port-Adresse (0...2:frei, 3...9: Keyboard, 10...15: Display) ;A000h LED-Daten an gewählte… text/html 2010-10-13T15:49:16-05:00 mfritze http://www.sarnau.info/atari:protection_barbarian?rev=1286999356&do=diff This seems quick and simple: Byte 30 in Track 79 has to be either 0x00 or 0xFF. Maximum of 10 tries to figure that out... However I can't test it, because it doesn't seem to run in STeem. text/html 2010-10-05T17:10:55-05:00 mfritze http://www.sarnau.info/atari:protection_maupiti_island?rev=1286313055&do=diff This game has a custom disk format, which I'll describe here: The two disks are 80 tracks, two sided. Track 1, Side 1: 9 Sectors, no file system. The boot sector loads remaining 8 sectors in the track, which contains the “custom BIOS”. Interestingly the developer did an off-by-1 error and tries to load 9 sectors starting at sector 2. Therefore the Floprd() call actually fails... But this is not part of the protection.