Search found 40 matches: prodos

Searched query: prodos

by Twoflower
Thu Mar 03, 2022 8:48 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

... of how much 6502/6510 code you've learned over the years, but this is kind of a dead end. As I mentioned to you in the PM, the other (trackloading Prodos) disksides have never been decloaked on the C64. Okay. It has to be a T/S loading system, akin to BTII. BTIII is built on top of the BTII engine, ...
by Darendor
Thu Mar 03, 2022 8:37 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

So, someone puts LOAD "*",8,1 and hits RETURN: - The computer loads PRODOS.PRG, which auto-boots - PRODOS.PRG then loads 2.0.PRG - 2.0.PRG does 2 things: a) Block-Executes T18 S13, b) Somehow - method unknown, but the code appears to be in $C500 - $C55E ...
by Darendor
Thu Mar 03, 2022 1:00 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

... of how much 6502/6510 code you've learned over the years, but this is kind of a dead end. As I mentioned to you in the PM, the other (trackloading Prodos) disksides have never been decloaked on the C64. Okay. It has to be a T/S loading system, akin to BTII. BTIII is built on top of the BTII engine, ...
by Twoflower
Wed Mar 02, 2022 8:23 pm
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

First of all - i'm seriously impressed of how much 6502/6510 code you've learned over the years, but this is kind of a dead end. As I mentioned to you in the PM, the other (trackloading Prodos) disksides have never been decloaked on the C64.
by Darendor
Wed Mar 02, 2022 10:01 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

So far, I've established with reasonable certainty: - Load "*",8,1 loads the PRODOS file - The PRODOS file loads the 2.0 file - The 2.0 file performs a Block Execute on the 1541's RAM buffer #4 ($0700) to load Track 18 Sector 13 - Track 18 Sector 13 then ...
by Darendor
Sun Feb 27, 2022 12:16 pm
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

So I've managed to work out the sequence of events when one loads the game on the C64, to a point. The load sequence so far: PRODOS -> 2.0 -> Block-Execute T18 S13 (executed code within the 1541 disk drive itself); this code then manipulates the buffers within the drive to load the rest ...
by Darendor
Fri Feb 25, 2022 2:02 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

... I get this screen a half second after it boots up with the BOOT disk in it: https://i.imgur.com/fPuA0oJ.png So yeah, I'm dealing with Prodos 8 v1.4. That's the filesystem BTIII seems to use, whether it's for the C64 or Apple II. Any Apple II wizards in the house?
by Darendor
Thu Feb 24, 2022 12:41 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Re: Bard's Tale III C64 Musings

Here's the "2.0" file. This is the main loader program, apparently. The PRODOS program loads it and calls $c20e in memory to execute it. Or something. Weirdly, it references 2 files: - B-E 2 0 18 13 - # (This seems tell the drive to load the first file ...
by Darendor
Wed Feb 23, 2022 11:16 am
Forum: Developer's Heaven
Topic: Bard's Tale III C64 Musings
Replies: 14
Views: 1329

Bard's Tale III C64 Musings

So I decided to try to take a look at the BOOT disk for the C64 version of Bard's Tale III. The first file, called PRODOS, disassembles thus: (Annotations added by me) 02bc 12 ??? 02bd 08 php Memory location 0812 02be 0a asl a J 02bf 00 brk 02c0 93 ??? Unknown 02c1 20 22 50 jsr ...
by ZeroZero
Mon Jan 19, 2015 9:19 am
Forum: The Thief of Fate
Topic: BT3- ToF C64 Hex Editing
Replies: 3
Views: 5244

Re: BT3- ToF C64 Hex Editing

... data structure in an old Apple II magazine in some archive . Good Luck! E D I T The data in the sectors are identical to the Apple II version. The ProDOS emulation for the C64 was created to use the same disks on Apple II and C64 (save development costs).
by Lory
Mon Dec 01, 2014 11:33 am
Forum: The Thief of Fate
Topic: BT3- ToF C64 Hex Editing
Replies: 3
Views: 5244

BT3- ToF C64 Hex Editing

... use DirMaster for a little editing of XP, call it cheating anyways, that's what i call it. As you know, the BT3 Char disk is encoded with Apples PRODOS, so there are no files for accessing the stats directly. Via BAM-Editing it's possible to get into the Hex-Data, and that's the point where i ...
by Twoflower
Thu Feb 28, 2013 12:06 am
Forum: The Thief of Fate
Topic: C64 BT3 Multiple Diskdrive Support?
Replies: 5
Views: 6194

Well, that depends. :-) Just located a little program which seems to decode the data contained in the Prodos diskformat and copy them over to CMD-devices. This should also fix the issue with the drive being locked to drive #8. As for now, this fix does only support CMD HD, ...
by silverbird
Sat Oct 29, 2011 7:51 am
Forum: Emulation
Topic: What to do with those files?
Replies: 16
Views: 17149

... the top file which is the boot file. Now another menu will appear press the down arrow to highlight the first two rows "Boot disk" "Prodos" press enter two choices here I choose "Reset and load" press enter. You should be back to the good old blue screen type in load"*",8,1 ...
by Darendor
Sun Mar 28, 2010 3:38 am
Forum: Developer's Heaven
Topic: Apple Bard's Tale I Disassembly
Replies: 23
Views: 25180

... underlying disk-access architecture which makes it harder to see what's going on with the Apple version. I've been kind of moseying off getting ProDOS disk images so I can start work on the Bard's Tale 3 character editor at long last. :D I've used a 1541 to defend myself before. :? So, this ...
by Quantum Reality
Sun Mar 28, 2010 3:34 am
Forum: Developer's Heaven
Topic: Apple Bard's Tale I Disassembly
Replies: 23
Views: 25180

... underlying disk-access architecture which makes it harder to see what's going on with the Apple version. I've been kind of moseying off getting ProDOS disk images so I can start work on the Bard's Tale 3 character editor at long last. :D