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Z80 & 68k Assembly =>
z80 & ez80 Assembly
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Xeda112358
Active Member
Joined: 19 May 2009
Posts: 520
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 Posted: 12 Apr 2012 05:28:12 am Post subject: |
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Hmm, just took a more detailed look:
Code:
CheckShoot:
CP sk6
CALL Z, AddBullet
LD HL, count
LD A, (HL)
CP 0
JR Z, InfiniteLoop
PUSH AF ;you push... okey dokey
LD HL, wait
LD A, (HL)
INC A
LD (HL), A
CP 0
JP NZ, Infiniteloop ;If your wait loop isn't zero, you never pop D:
Also, instead of INC A \ LD (HL),A, you can do INC (HL) and you don't even need the CP 0. When you do INC or DEC on an 8-bit register, if it reaches zero, the z flag is set, otherwise it is nz. |
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jammasterz
Advanced Newbie
Joined: 28 Nov 2011
Posts: 72
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| Posted: 12 Apr 2012 11:07:11 am Post subject: |
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Nooooo! How is this possible... I can't believe i didn't notice it. I allready made this mistake once in my hello-interrupt program and i swore i would'n make it again...
There is just one easy bug to fix that i skipped untill this is fixed. Thanks for the tip! |
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Xeda112358
Active Member
Joined: 19 May 2009
Posts: 520
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| Posted: 12 Apr 2012 02:22:16 pm Post subject: |
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| No problem XD I make lots of silly mistakes. I once had to delay updates to one of my programs for a few months because it would on occasion randomly crash. (literally, the same code would sometimes take only 18 iterations to crash, other times thousands) What was the issue? Interrupts and me playing with the stack. I was changing the stack pointer around and occasionally an interrupt would fire and do pushes and pops overwriting key data. I took a few months to tease that out, but I said I wouldn't do it again and then a few weeks later I turned around and did just that XD. |
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