Magic3 disassembled - understanding the magic

[Rattle]

I think we need a new thread for this now

I have attached my disassembling of the magic3 hex released.

I have use equ's for making it easier to understand.
Others are welcome to fill out the blanks The code is pretty easy to understand even if you don't know PIC/Scenix assembler.

/Rattle

[betablockers]

I still have a lot of comments to add but as above, the more feedback the better.

[Rattle]

RCE, your code looks great
It assembles correctly, exact match.

I don't think you have something to learn from my sources A little to much macros for my taste though Shouldn't be to hard to add functionality with that good sourcecode.

Edit:
There are some errors:
* pin numbers, you do like this:
1 | | 3
2 | | 4
it should be:
1 | | 4
2 | | 3
* Pin 7 Z is not CDDVD OE, I think it's ejectbutton.
RB3 is CDDVD OE and RB4 might be disc-detect.

I could be wrong though.

/Rattle

[razorx]

just wondering but has anyone recoompiled this code and tested it on there homebrews?


if so just wondering if u got it working or not and which compiler u used i tried witht he SX-KEY software but i cant seem to get it to work afther it's compiled

[Rattle]

Use SASM to compile and it will give you an exact match of the original hex. At least 0.72 did. Maybe you forgot to set the fuses correctly?

Compiling with SX-key did NOT give me the same result as with SASM.

/Rattle

[razorx]

well using SX-Key i got code that compiles to the exact same as the .hex which i pick'd up in an other post


now i'm just trying to get my hands on V7 bios patch codes for OSDSYS

the magic2 ones used in the current rev16 release dont seem to work on an NTSC 39001 but the psx boot code works

playing around with the code i also got it twinked to boot (dont give me the hell screen no more) hehe just hangs befor giving the ps2 logo

[razorx]

no guichi just hooked me up with a link to do to a bios dump


tho i'm going to have to rig up some way of booting the naplink disc


but i got a few idea's

[razorx]

tried those touchups to the code but it didnt seem to help much heh and till i can get a ps2 game / naplink cd to boot i wont be able to dump the bios

[Frankieboy]

do you have a description of all the bios pins?

one year ago i made a description using the neo 4 and messiah diagrams. but i don't have it now.

D0-D7, A0-A18, chip enable usw.

is it possible to read the bios with a pregrammer, when the chip is soldered in? must i solde out the chip for read out the bios ?

[Robot]

i tested the full sleep you did , it works , good work!!