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Other bugs in magic3 code
Other bugs in magic3 code –
Hi to all ,
Like a war bullettin , here is 2 new bugs discovered in regional patch routine.
1) byte to patch are 16 , but in routine you can see byte counter loaded with 15 and decreased to 0.
To solve simply load byte counter with 16 ( or 10h).
2) minor bug : timing problem on send latest byte of regional patch , can't be acknoweledged to OE
of CDDVD controller .
To solve : insert delay320 nS before release bus at exit .
You can easyly simulate routine to see all this !
CDDVD_PATCH_DVD routine now fixed but not tested with backup ( may work / not work ).
CDDVD_PATCH_CD routine need some fix ( will fix in a few days ) but work
Have a problem yet with some chips reading DVD line ( ?!?).
You can see what's changed in this .src .
Note : this SRC is only for test purpose and to see modify ! This have a chip pin used for sync , it can damage PS2
if used incorrectly.
08/02/03 reloaded source.zip
Note use it only to see changes , source use a pin to sync logic analyzer and can damage your PS2 if connected !
not working , it goes to red screen
To warpjavier : 0 is skipped , so you have 15 to 1 send bytes ( tested with logic anal. , latest byte 84h never be on bus with original byte counter ).
to all other boy : ok , won't work with dvd-r , I've just received and tested them . To correct routine simply patch skipped A6h.
Now load original ( seem ) every time and exit routine but little
problem with dvd-r : sometimes continue hang without a logic reason: simply disappear sync byte 10,F7,14 ( have an incredible sequence of 10h & 12h ) so chip have nothing to do (... will continue test then post result & corrected routine).
however routine sync correcly.
A note: do not use delay320nS before exit regional patch routine .
To improve timing check oe controller line waiting oe=1 then exit !
Ok Lacyg , have reloaded working source.zip at start of thread.
This work on my V3 pal ( dvd-r included) with chip connected as original magic3 @ 50MHz
Thks Lacyg .
I think there is difference from first ( V3/4) ps2 vers. to other vers.
My V3 work fine with this CD routine . try to back to skip 2 byte.
Continue work on DVD routine ( hang without reason ?!?)