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Messages - calcdude84se
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1231
« on: September 17, 2010, 07:24:19 pm »
Here's the source code and hex for the checksumming routine
di
in a,($06)
push af
ld hl,$0000
ld bc,$0700
jr go
ComeBack:
in a,($02)
bit 5,a
jr nz,TI84P
bit 7,a
jr nz,TI83PSE
ld bc,$1F18
jr go
TI83PSE:
ld b,$7F78
jr go
TI84P:
in a,($21)
bit 0,a
jr nz,TI84PSE
ld bc,$3F34
jr go
TI84PSE:
ld bc,$7F74
go:
ld a,b
out ($06),a
ld de,$4000
loopi:
ld a,(de)
add a,l
ld l,a
adc a,h
sub l
ld h,a
inc de
ld a,d
cp $80
jr c,loopi
dec b
ld a,c
cp b
jr c,go
ld a,c
or a
jr z,ComeBack
pop af
out ($06),a
retF3DB06F52100000100071821DB02CB6F200DCB7F200501181F18120678180EDB21CB47200501343F180301747F78D3061100401A856F8C9567137AFE8038F40579B838E979B728C4F1D306C9I've tested it and it doesn't crash. Note that it should be its own subroutine because it returns when it's done.
On my calc, it took a couple seconds to run (I enclosed it in an Axe program).
1232
« on: September 16, 2010, 10:25:54 pm »
Mon 11 Oct, 10, 09:22:53 This is in Eastern Time.
1233
« on: September 16, 2010, 08:59:43 pm »
Oh, I found another bug: If the "Goto" button in the debug window is forced to be secondary (you have to click >> button to get to it) it doesn't work. In fact, even if shown primarily, it won't work unless the disassembly section has focus. The right-click menu does not work either.
1234
« on: September 16, 2010, 07:04:42 pm »
What about at over 65536?  That'd take a while, though. And yeah, that was amusing to see (The >2000 tries... which should have been >9000!!! ) I myself have never finished it  Edit: $0400 th post!
1235
« on: September 16, 2010, 07:01:04 pm »
That's partially because it doesn't work completely I wish all the contestants good luck! I'll probably be voting this weekend.
1236
« on: September 16, 2010, 06:44:39 pm »
Badly written is easy. Malicious is what's difficult.
For badly written, a checksum is more than enough. You just need to increase the size of the checksum to increase security (Though only 2 bytes should be necessary anyway)
Malicious is harder, but by increasing the checksum size to, say, 4 bytes instead of 2, it becomes harder for a program to change the OS without changing the checksum.
I'll write some ASM to create a 2-byte checksum of the OS and return it in hl (for Axe purposes).
* calcdude goes and codes
1237
« on: September 16, 2010, 05:25:59 pm »
Given that most of his (its?) posts are only a few words long... We'll have to wait and see
1238
« on: September 16, 2010, 05:18:16 pm »
Sounds cool! I might participate. (Though I've never made a game... ) Can we request to only compete with (a) certain language(s)?
1239
« on: September 16, 2010, 05:13:39 pm »
Yep, there'll be a Portal 2 Maybe we can name Builderboy's game Portal b10?
1240
« on: September 15, 2010, 07:45:54 pm »
okay, good luck. Can't wait! 
1241
« on: September 15, 2010, 07:42:45 pm »
Nice. Screenshot? Edit: ninja'd
1242
« on: September 15, 2010, 07:37:52 pm »
Do you somehow use USB or the clock? It should run on an 83+SE too I wish you good luck in the contest!
1243
« on: September 15, 2010, 07:35:36 pm »
No, both exist And on 64-bit Windows, there is no command.com (search your computer for the file, it doesn't exist.)
1244
« on: September 15, 2010, 07:27:55 pm »
This. Is. Awesome. Good luck in the contest, you deserve to place 
1245
« on: September 15, 2010, 07:20:21 pm »
BUG! I can only press one key (on the keyboard) (32-bit version on Win7 64-bit) and then pressing keys doesn't work any more, not even clicking on the skin (which I can click on as many times as I want and it will work until I press a key)
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