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Messages - Jon
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166
« on: April 16, 2007, 04:19:00 pm »
Always good to get another ASM-adept onboard.
*Jon
167
« on: April 16, 2007, 04:09:00 pm »
That's brilliant man. And it's pure luck that the opcode for rst 38h is the signed 8-bit value for -1. That's friggin' awesome, kudos!   Although, wouldn't the command be jr c,$-1 ? I believe tasm will interpret jr c,$ff to mean jr c,$00ff, and hence give you a range of relative branch error.
168
« on: April 12, 2007, 11:56:00 am »
yeah good point 7<8 heh
169
« on: April 02, 2007, 04:52:00 pm »
Dude, that's insane!!!!!
Now to port that to calculators...
170
« on: April 01, 2007, 03:16:00 pm »
Hey now, don't diss MOS just cuz' your calc is stuffed to the rafters
171
« on: March 29, 2007, 04:44:00 pm »
so will this be HRP's main project?
172
« on: March 27, 2007, 01:51:00 pm »
To Liazon: i didn't use pti's screen capture, pti takes really small pics. This is calccapture screening pti. Update: I've made some optimizations, and cut the routine down to 450,000 CC's giving it a framerate of about 13 fps. The speed increase is a bit noticable in this pic. 
173
« on: March 26, 2007, 07:21:00 pm »
*Jon
174
« on: March 26, 2007, 06:59:00 pm »
I've found that the best option is to simply back it up in the stack. It is the same number of bytes each way, since ld iy,xxxx is 4 bytes, and push iy/pop iy are 2 bytes each. Also, then it allows the user to store iy for something else (if they were in an IM 2 ISR, they might not want iy to be set back to the flags).
175
« on: March 26, 2007, 06:52:00 pm »
Not to pry, but are you interested in helping me with DK? It's a really daunting task, and the extra help would be much appreciated.Anyways, minesweeper looks frikin awesome, nice work! :king: 
176
« on: March 26, 2007, 06:45:00 pm »
177
« on: March 25, 2007, 05:54:00 pm »
Is this in Assembly or Basic? I'm just wondering.
178
« on: March 25, 2007, 04:50:00 pm »
Sorry, my bad. The Donkey Kong Country (SNES) level-set, but the B&W look of Donkey Kong Land (GB)
179
« on: March 25, 2007, 04:46:00 pm »
if you had the address you wanted in hl, you could use jp (hl)
180
« on: March 25, 2007, 04:44:00 pm »
Here's a simple size optimization for direct input: Instead of: c1--> | CODE | ec1
out (1),a
nop
nop
in a,(1)
c2 |
ec2
Use:
c1 --> | CODE | ec1
out (1),a
ld a,(de)
in a,(1)
c2 |
ec2
LD A,(DE) creates the same delay as 2 NOP's, but it takes 1 byte instead of 2
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