file   : readme.txt
author : rtw
created: 2017-08-17
version: 1.1

VIRTUA FIGHTER 4 EVOLUTION

Title   : VF4 EVOLUTION
System  : NAOMI2
Disc Id : GDS-0024C

PIC key is the same as: GDS-0024B

From MetalliC:

Even though the game id is: GDS-0024C the game title is still "(Version B)"
This probably signifies that there were no changes to game mechanics.

This version was released one and a half month later than Rev B (3 Nov 2002)

difference:
- updated card reader interface board MIE firmware (small board "between" 
  Naomi Maple and RF card reader, uses same MIE MCU as Naomi mobo)
- minor tweaks in few Maple interface handling routines, 
  probably related to above.

In general it looks like Rev B had some card reader issues, they were
resolved/fixed in the Rev C update

VF4 MIE MCU firmwares comparison - has 3 fixes in total:

1. More robust maple data packet receive routine, it seems there
were some bugs or complexities in hardware, related to status 
bits "we received some data" and "data receive was complete", 
so in updated FW they check both

2. In one of command handlers they forgot to copy/backup input
parameter before clear of recv buffer

3. Incorrect handling of "counter decrement" RFID command reply
(not used in VF games) - they forgot to fetch from UART FIFO last reply byte

No gameplay changes, at least I see no changes in SH4 code section
except several low-level Maple interface routines. I can't understand 
meaning of these changes, but in theory, these changes may also 
improve/decrease input latency, since both JVS and RFID accessed via same Maple interface.

MD5                               Name
---------------------------------------------------------
9ae89c9556316f4b6526ded95647b156 *gds_0024c_disc_back.png
c7d6136e029ddd4b8f365f512e2f2c89 *gds_0024c_disc_front.png
b3ecdf113fd42344dd84142679e4cb36 *disc.gdi
a77fe7fafdbbb4fc2e374b4f57f5fa9e *gdrom.htm
8ff4b8957d98554a239abc3d88dd7f17 *track01.bin
060415343d1e1783e66d6aa5a996a593 *track02.raw
221976647c3a606081815e6e20b1ef54 *track03.bin

supplier: ShouTime
credits: Darksoft, f205v, rtw, ShouTime
dumper: rtw