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Messages - Xeda112358
Pages: 1 ... 168 169 [170] 171 172 ... 317
2536
« on: January 15, 2012, 10:16:04 pm »
For the second one, the OR A would not recognise if a was %00110000, right? But the first one looks a lot more beautiful, thanks!
2537
« on: January 15, 2012, 10:06:47 pm »
I just want to know if bit 5 == bit 1 and bit 4 == bit 0.
2538
« on: January 15, 2012, 10:02:47 pm »
Thanks! I still wonder if there is some crazy method available, but that is a lot better!
I just want to check if they are the same or not. If not, the XOR (or in your case, the AND) will return nz whereas if they are the same, it will return z.
2539
« on: January 15, 2012, 09:51:37 pm »
I want to compare bit 5 to bit 1 and bit 4 to bit 0 in the A register (the other bits are always 0). in other words, I want to xor the two nibbles of A or something similar, but as fast as possible. To start, here is one idea:
ld c,a
and $F0
sla c
sla c
sla c
sla c
xor c
That is 47 cycles, 12 bytes-- too big/slow/inelegant for me to accept as the best method.
2540
« on: January 15, 2012, 09:42:39 pm »
In any event, I think all will go well and if it does not, we will make it go well  And we *can* live without internet 
2541
« on: January 15, 2012, 09:37:40 pm »
I believe we have a few folks here who are familiar with security 
2542
« on: January 15, 2012, 09:29:16 pm »
Okay, I have been having a tough time with this, so I need help. I am trying to send data between two calculators and I can easily send a single bit or two bits, but nothing longer seems to work. The protocol idea that I was working with looked like this (this is an outline): ld b,8
Send:
rlc c ; get the next bit of C
ccf ; inverts the c flag since writing to the port will be inverted
adc a,a ; rotate the bit into a
scf ; sets the carry flag
adc a,a ; sets the first bit
out (0),a ; send it to the port
dec b ; decrements the counter
ret z ; ends if the counter hits 0
CheckLoop:
in a,(0) ; Check the port
rra ; We test bit 0
jr c,Send ; Ready to send the next bit
jp CheckLoop ; Eh, keep checking
Receive:
ld b,8
Loop:
in a,(0) ; check the port
rra ; check the bit to see if the data was being sent
jr c,$-3
rra ; get the bit that was sent
rl c ; rotate it into C
out (0),a ;since A is 0, this will set both bits in port 0 signaling that another bit can be sent
djnz Loop
ret
Actually, I just typed that up and is only vaguely like the codes I have come up with before. In any event, if I take out the counters and only send one bit, it works fine and I receive it, bit if I try to send all 8 bits, it freezes (I think the receiving end). Thanks much! I'd love to figure this out
2543
« on: January 15, 2012, 09:04:03 pm »
@systwo: Good point and great insight. I am sure we could find something, though, but I am also in an excitable mood 
2544
« on: January 15, 2012, 08:43:24 pm »
What is this "USENET" ? It sounds familiar... My parents were thinking of getting this at some point, I believe, because there was no other way to get internet faster than half the speed of dial-up...
2545
« on: January 15, 2012, 08:41:23 pm »
I wonder if we could attack back with the combined might of our calculators? 
2546
« on: January 15, 2012, 08:39:17 pm »
@saintrunner: I'm game.
EDIT: The
2547
« on: January 15, 2012, 08:28:35 pm »
@Spyro543: I have been thinking of making a new internet protocol, too. The internet is miserably slow where I live, but I was working on a method so that everybody in the local area could have free 24/7 access to the news in that system and whatnot. It would be open to a limited userbase and spread out in communities around the world. If one went down with an infection, the rest would still be up and working, too, and there would be no way to censor or throw a kill switch.
2548
« on: January 15, 2012, 08:24:43 pm »
Maybe you guys could send a mass email, that way the users who are not always here would know, too.
2549
« on: January 15, 2012, 08:22:12 pm »
Good points. What if we started an e-mail based community?
2550
« on: January 15, 2012, 07:07:28 pm »
Wow, that would be amazing! Great freaking ideas! And you might be able to make the mic port on a computer read data sent from the calcs, too.
Wow, wireless might be possible for the calc in a new way... We would need a specially made device hooked up to the calc, but using sound is a neat idea!
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