HacDC Wiki - User contributions [en]

Disassembly

2010-06-23T00:31:36Z

Evilmoo:

Some links to get us started:

[[wikipedia:Bit|Bit]]

[[wikipedia:Byte|Byte]]

[[wikipedia:http:Pointer_(computing)|Pointer]]

[[wikipedia:MOS_Technology_6502|6502]]

[http://e-tradition.net/bytes/6502/6502_instruction_set.html 6502 instruction set]

[http://www.atariarchives.org/ Atari 8-bit documentation online]

[http://www.atariarchives.org/mapping/memorymap.php Atari 8-bit memory map]

[http://atari800.sourceforge.net/ Atari 800 emulator]

[http://www.virtualdub.org/altirra.html Altirra - an Atari 800 emulator for Windows]

[http://thepiratebay.org/torrent/5576778 A ton of Atari 8-bit documentation]

[http://sourceforge.net/projects/atari800/files/ROM/Original%20XL%20ROM/xf25.zip/download Atari 8-bit ROMS]

[http://www.atarimania.com/game-atari-400-800-xl-xe-space-invaders_4831.html Space Invaders]

[http://www.cc65.org 6502 cross-compiler and tools]

[http://www.atarimania.com/pgemainsoft.awp?type=G&system=8 Atarimania 8-bit games]

Disassembly

2010-06-22T22:41:17Z

Evilmoo: add another site

Some links to get us started:

[[wikipedia:Bit|Bit]]

[[wikipedia:Byte|Byte]]

[[wikipedia:http:Pointer_(computing)|Pointer]]

[[wikipedia:MOS_Technology_6502|6502]]

[http://e-tradition.net/bytes/6502/6502_instruction_set.html 6502 instruction set]

[http://www.atariarchives.org/ Atari 8-bit documentation online]

[http://atari800.sourceforge.net/ Atari 800 emulator]

[http://www.virtualdub.org/altirra.html Altirra - an Atari 800 emulator for Windows]

[http://thepiratebay.org/torrent/5576778 A ton of Atari 8-bit documentation]

[http://sourceforge.net/projects/atari800/files/ROM/Original%20XL%20ROM/xf25.zip/download Atari 8-bit ROMS]

[http://www.atarimania.com/game-atari-400-800-xl-xe-space-invaders_4831.html Space Invaders]

[http://www.cc65.org 6502 cross-compiler and tools]

[http://www.atarimania.com/pgemainsoft.awp?type=G&system=8 Atarimania 8-bit games]

Disassembly

2010-06-16T17:43:35Z

Evilmoo: added cc65

Some links to get us started:

[[wikipedia:Bit|Bit]]

[[wikipedia:Byte|Byte]]

[[wikipedia:http:Pointer_(computing)|Pointer]]

[[wikipedia:MOS_Technology_6502|6502]]

[http://e-tradition.net/bytes/6502/6502_instruction_set.html 6502 instruction set]

[http://www.atariarchives.org/ Atari 8-bit documentation online]

[http://atari800.sourceforge.net/ Atari 800 emulator]

[http://www.virtualdub.org/altirra.html Altirra - an Atari 800 emulator for Windows]

[http://thepiratebay.org/torrent/5576778 A ton of Atari 8-bit documentation]

[http://sourceforge.net/projects/atari800/files/ROM/Original%20XL%20ROM/xf25.zip/download Atari 8-bit ROMS]

[http://www.atarimania.com/game-atari-400-800-xl-xe-space-invaders_4831.html Space Invaders]

[http://www.cc65.org 6502 cross-compiler and tools]

Disassembly

2010-06-15T20:28:00Z

Evilmoo: and leon is getting larrrrrrrrrrger

Some links to get us started:

[[wikipedia:Bit|Bit]]

[[wikipedia:Byte|Byte]]

[[wikipedia:http:Pointer_(computing)|Pointer]]

[[wikipedia:MOS_Technology_6502|6502]]

[http://e-tradition.net/bytes/6502/6502_instruction_set.html 6502 instruction set]

[http://www.atariarchives.org/ Atari 8-bit documentation online]

[http://atari800.sourceforge.net/ Atari 800 emulator]

[http://www.virtualdub.org/altirra.html Altirra - an Atari 800 emulator for Windows]

[http://thepiratebay.org/torrent/5576778 A ton of Atari 8-bit documentation]

[http://sourceforge.net/projects/atari800/files/ROM/Original%20XL%20ROM/xf25.zip/download Atari 8-bit ROMS]

[http://www.atarimania.com/game-atari-400-800-xl-xe-space-invaders_4831.html Space Invaders]

Disassembly

2010-06-15T19:39:41Z

Evilmoo: another link

Disassembly

2010-06-15T19:17:45Z

Evilmoo: one more link added

Disassembly

2010-06-15T19:14:00Z

Evilmoo: more links added

User:Evilmoo/IDA Pro

2008-11-04T20:07:17Z

Evilmoo: first sector analysis

Things you need to know going in:

* We will be working on [[wikipedia:Alternate_reality_(video_game)|Alternate Reality: The Dungeon]]
* It ran on the [[wikipedia:Atari_8-bit_family|Atari 8-bit]]
* The Atari 8-bit consisted of the following chips:
** [[wikipedia:MOS_6502|MOS 6502]]
** [[wikipedia:ANTIC|ANTIC]]
** [[wikipedia:POKEY|POKEY]]
** [[wikipedia:PIA|PIA]]
** [[wikipedia:GTIA|GTIA]]
* A detailed memory map can be found here: [http://www.atariarchives.org/mapping/memorymap.php]
* We will use the following tools in our work:
** [[wikipedia:Make_(software)|make]]
** [[wikipedia:cc65|cc65]]
** [[wikipedia:Git_(software)|git]]
** [[wikipedia:IDA_Pro|IDA Pro]]
** [http://atari800.sourceforge.net/ the atari800 emulator]
** some various Unix commands to process data
* Some information about Atari 8-bit disk images: [http://www.atarimax.com/ape/docs/DiskImageFAQ/]

Our source information comes from here: [http://www.atarimania.com/detail_soft-MENU-8-VERSION_ID-240.html]

We obtain the binaries by clicking on the "DOWNLOAD" link.

The .ZIP file contents look like this:

Archive: Alternate_Reality_The_Dungeon.zip
Length Method Size Ratio Date Time CRC-32 Name
-------- ------ ------- ----- ---- ---- ------ ----
92176 Defl:N 65207 29% 10-03-04 16:56 dc960629 Alternate Reality - The Dungeon _ disk 2 _ side B.atr
92176 Defl:N 54159 41% 10-03-04 16:55 2afec574 Alternate Reality - The Dungeon _ disk 2 _ side A.atr
92176 Defl:N 348 100% 10-03-04 16:11 58f056d5 Alternate Reality - The Dungeon _ character disk.atr
92176 Defl:N 56987 38% 10-03-04 16:57 20c4fd02 Alternate Reality - The Dungeon _ disk 3 _ side A.atr
92176 Defl:N 80533 13% 10-03-04 16:57 7c55f7c4 Alternate Reality - The Dungeon _ disk 3 _ side B.atr
92176 Defl:N 57507 38% 10-03-04 16:54 b605610d Alternate Reality - The Dungeon _ disk 1.atr
-------- ------- --- -------
553056 314741 43% 6 files

We will concentrate on Disk 1 to begin with, since it is the boot disk. It is an .ATR file, so we need to remove the first 16 bytes to convert it into a raw image:

$ dd if="Alternate Reality - The Dungeon _ disk 1.atr" of=ar11.img bs=16 skip=1

We only want the first sector for now, so we will continue with our dd Swiss Army knife:

$ dd if=ar11.img of=11-s001.bin bs=128 count=1

We want to look at it in hex first, so we will use hexdump:

$ hexdump -v -C 11-s001.bin

00000000 01 01 00 06 06 06 a9 40 8d 30 02 a9 06 8d 31 02 |.......@.0....1.|
00000010 a5 14 c5 14 f0 fc ad 01 d3 09 02 8d 01 d3 a9 10 |................|
00000020 8d 0a 03 a9 00 8d c6 02 85 41 8d 04 03 a9 b0 8d |.........A......|
00000030 05 03 20 53 e4 30 fb ad 00 06 8d ff af 4c 00 b0 |.. S.0.......L..|
00000040 70 41 40 06 9b 41 68 6f 79 20 70 69 72 61 74 65 |pA@..Ahoy pirate|
00000050 73 21 20 20 43 68 61 6e 67 65 20 74 68 65 20 66 |s! Change the f|
00000060 69 72 73 74 20 62 79 74 65 20 69 6e 20 74 68 69 |irst byte in thi|
00000070 73 20 73 65 63 74 6f 72 20 74 6f 20 61 20 30 2e |s sector to a 0.|

User:Evilmoo/IDA Pro

2008-11-04T19:55:15Z

Evilmoo: captchas are annoying

User:Evilmoo/IDA Pro

2008-11-04T19:50:32Z

Evilmoo: step 1 of 1000

User:Evilmoo/IDA Pro

2008-11-04T19:35:00Z

Evilmoo: gather our references

User:Evilmoo

2008-11-04T18:57:47Z

Evilmoo: add class link

Evilmoo is considering teaching a class about IDA Pro. You can read along as it is assembled [[User:Evilmoo/IDA_Pro|here]].

User:Evilmoo

2008-11-04T18:53:11Z

Evilmoo: first draft

Evilmoo is considering teaching a class about IDA Pro.

Suggested Classes

2008-11-04T18:31:35Z

Evilmoo: /* I'd like to teach... */ grammar is still good

== I'd like to learn... ==

* how to make short-pinned locks for practicing [[Locksport]] -[[User:Katie|Katie]] 15:40, 23 July 2008 (UTC)
* Practical crypto, since we should all be signing our email. -- [[User:Myself|Myself]] 23:41, 27 July 2008 (UTC)
* ''add your wish here!''

== I'd like to teach... ==
Potential teachers: see [[How to Run an Event]]!

* Slide rule usage
:I can teach beginning operations (multiplication, division, exponentiation, trig, logs, etc), but I'm pretty slow these days. [[User:Hudson|Hudson]] 16:28, 27 July 2008 (UTC)
* Oscilloscopes and triggers
:How to use a scope and build a programmable trigger using a microcontroller. [[User:Hudson|Hudson]] 16:28, 27 July 2008 (UTC)
* Unix tricks
:Efficient text processing using the Unix toolkit (vi, cut, sed, awk, perl, dc, etc). [[User:Hudson|Hudson]] 16:28, 27 July 2008 (UTC)
* Makefiles for microcontrollers
: How to automate the build, install, test cycle using a serial bootloader and make. [[User:Hudson|Hudson]] 16:28, 27 July 2008 (UTC)
* How to type
:timball and mark steele teach n00bs to codes. [[User:Timball|timball]] Thu Aug 7 18:39:11 UTC 2008
* Telephony
:Learning Telephony using Asterisk [[User:Emacsen|emacsen]]

[[Category:Classes]]

Single Expenditure and Reimbursement Policy

2008-11-04T18:25:24Z

Evilmoo: /* Potential Solutions */ grammar is good

== Summary ==
Single expenditures are important to the operation of HacDC and its Events and Projects. However, multiple single-expenditures that are really outlays for a particular Event or Project, form a defacto ad-hoc budget. These de-facto ad-hoc budgets can become quite large and Membership only can only know how large, after the fact. Ad-hoc defacto budgets can easily consume most of the HacDC funds and push-back other Events or Projects that require real budgets. Real budgets are burdened by approval whereas ad-hoc defacto budgets do not require approval, even though they can theoretically spend as much funds as a real budget.

== Potential Solutions ==

* Lower the limit of single expenditures to $100 and record the expenditures in the weekly finance report and require pre-approval for reimbursements over $100
** Pros:
*** HacDC members are able to execute single expenditures
*** Any quickly organized Event/Project that attempts to use multiple single-expenditures as a de facto ad-hoc budget would be limited from doing so.
*** HacDC members would be informed at least once a week as to what single expenditures have been executed
*** Depletion of HacDC funds by de facto ad-hoc budgets would be limited
*** Single Expenditures would be limited in purpose for providing one-shot low cost resources (food, soda, etc) for Events and Projects
** Cons:
*** Quickly organized events would require the organizers to get approval from HacDC membership for funding beyond single expenditures
*** Quickly organized space building/storage infrastructure improvements would require the organizers to get approval from HacDC membership for funding beyond single expenditures
*** Quickly organized Projects over $100 in total costs would require the organizer to get approval from HacDC membership for funding beyond single expenditures
*** Quickly organized projects that may require reimbursements to be implemented would require the organizers to get approval from HacDC membership.

== PROPOSAL ==

The following Administrative Policy is submitted for discussion:
* Single Expenditures
** Single expenditures under $100 do not require approval
** Single expenditures that are $100 or over, require approval by [[quorum]] of the voting membership.
** All single expenditures must be recorded by the Minster of Finance in the weekly Finance Report as a line item that shows the day, amount, and purpose of the expenditure.
* Reimbursements
** Reimbursements over $100 require pre-approval by quorum of the voting membership.