Front Far East (FFE), and most of it's suppliers, have bragged and bragged for months about how decent, stable, and technologically advanced the SWC DX2 has become. The truth of the matter is, it's not.
There's many bugs in this new unit, as admitted by The White Knight of
· Console Entertainment ·
Let's begin, shall we?
The bug is in relation to the Main/SubScreen colour addition/subtraction registers:
$2130 (CGSWSEL) $2131 (CGADSUB) $2132 (COLDATA)
According to Nintendo, certain registers need to be initialized after power-on. CGSWSEL, CGADSUB, and COLDATA need to be initialized (while the VBL is off) as follows:
STZ $2130 ; CGSWSEL = $00 STZ $2131 ; CGADSUB = $00 LDA #$E0 STA $2132 ; COLDATA = $E0At this point, you're free to modify these registers to your needs; they just need to be initialized once.
I found this bug when working with some code I had written; I wasn't setting
COLDATA to $E0 right after power-on, which caused one of my VRAM BGs
to show up as "white" instead of it's normal colour.
The DX2 claims to be able to handle the ECP (Extended Capability Port) and EPP (Enhanced Parallel Port) modes used by certain controller cards (such as DTC, Promise, and most new built-in controllers). Of course, there is also SPP (Standard Parallel Port), which is what the original SWC DX and DX/32 was based on.
Have you tried actually using either ECP/EPP on a DX2 unit? The results are astounding.
The amount of RAM the DX2 claims to have actually FLUXUATES according to which parallel port mode you use. Here is an explanation of how the DX2 "acts" under each of the three parallel port modes:
Just what in the hell is going on here? Why would the amount of RAM a backup unit claim to have fluxuate to which parallel port one uses? It makes no sense technically, nor commonly. And what about this power-cycling-related problem? Just why does that happen at all?
The solution seems to be to use the SPP mode; don't worry, despite resellers
claiming the ECP/EPP modes increase performance, they honestly do not.
The Disk Copy function doesn't work correctly; it locks your SNES unit when it asks for you to insert a disk.
This bug has apparently been fixed in the newest DX2 ROM.
It's pretty simple.
Most backup units should. Here's a list of ones which do:
Rumour has it that the Double ProFighter and the ProFighter X
have similar problems in relation to firmware registers not being initialized
on power-on. If you own a DPF or PFX, please contact me, as I can send you
two programs which can test the validity of your unit.
Damaged Cybernetics is not connected or affiliated with any mentioned
company in any way. The opinions of Damaged Cybernetics do not reflect the
views of the various companies mentioned here. Companies and all products
pertaining to that company are trademarks of that company. Please contact
that company for trademark and copyright information.