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The analyze infomation of PAD-controler and Memery I/O in PlayStation
The analyze infomation of PAD-controler and Memery I/O in PlayStation
95/ 4/17 T.Fujita
96/1/4 translated by H.Kashima
CAUTION: No warranty in this infomation.
1. pin assign
memory card
_______________________________
| |
| O O O O O O O O | (front view PSX)
|_______________________________|
pin 9 7 6 5 4 3 2 1
PS PAD connecter
=============================
| O O O| O O O| O O O | (front view PSX)
\________|________|_________/
pin 9 8 7 6 5 4 3 2 1
Pin signal dir active description
--------------------------------------------------------------------
1. dat in pos data from pad or memory-card
2. cmd out pos command data to pad or memory-card
3. +7V -- -- +7.6V power source for CD-ROM drive
4. gnd -- --
5. +3V -- -- +3.6V power source for system
6. sel out neg select pad or memory-card
7. clk out -- data shift clock
8. -- -- -- N.A.
9. ack in neg acknowladge signal from pad or memory-card
--------------------------------------------------------------------
*1) direction(in/out) is based from PSX
*2) metal edge in pad connecter is connected pin 4 and sheald calbe.
*3) signal SEL in PAD1, PAD2 is separated.
2. Comminucation timing chart
Timing is compatibled in PAD, Memory-card.
Overview
____ _____
SEL- |____________________________________________________________|
______ ____ ____ ____ ____ _________
CLK |||||||| |||||||| |||||||| |||||||| ||||||||
_______________________________________________________________________
CMD X 01h XXXX 42h XXXX 00h XXXX 00h XXXX 00h XXXX
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_____________________________________________________________
DAT -----XXXXXXXXXXXXX ID XXXX 5Ah XXXX key1 XXXX key2 XXXX-----
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ACK- ---------------|_|---------|_|---------|_|---------|_|-----------------
top command. first comminucation(device check?)
____
SEL- |__________________________________________________________________
______ _ _ _ _ _ _ _ __________________ _ _ _ _
CLK |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_|
__________ ___
CMD |________________________________________________| |_______
____
DAT -----XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |___________
ACK- ----------------------------------------------|___|--------------------
X = none, - = Hi-Z
0x81 is memory-card, 0x01 is standard-pad at top command.
serial data transfer is LSB-First format.
data is down edged output, PSX is read at up edge in shift clock.
PSX expects No-connection if not returned Acknoledge less than 100 usec.
clock pluse is 250KHz.
no need Acknoledge at last data.
Acknoledge signal width is more than 2 usec.
time is 16msec between SEL from previous SEL.
SEL- for memory card in PAD access.
3. example schematic chart of interface(5 volte to 3.3 volte convertion)
example in PAD
PAD PS system
/| P R,200ohm P=pullup(no need?)
PAD SEL ---- O< |--+--\/\/\/-- PS SEL-
\|
HC14
/| P R,200ohm
PAD CMD- ---- O< |--+--\/\/\/-- PS CMD
\|
HC14
/| P R,200ohm
PAD CLK- ---- O< |--+--\/\/\/-- PS CLK
\|
HC14
PAD DAT _________
|
|\O
----| > ------------- PS DAT
| |/
V HC125
PAD ACK- _________
|
|\O
----| > ------------- PS ACK-
| |/
V HC125
example in PSX
PSX PAD
SEL- _________
|
|\O P P=pullup
----| >--+---------- PAD SEL-
| |/
V HC125
CLK _________
|
|\O P
----| >--+---------- PAD CLK
| |/
V HC125
CMD _________
|
|\O P
----| >--+---------- PAD CMD
| |/
V HC125
/| P R,200ohm
DAT- ----O< |--+--\/\/\/-- PAD DAT
\|
HC14
/| P R,200ohm
ACK- ----O< |--+--\/\/\/-- PAD ACK-
\|
HC14
4. communication format in PAD
must be start translation, after command expected "0x01h" from PS-system.
PAD has 1-byte ID. pad is send a 2 byte of key-code + extend code after
PAD ID 'Z'(5Ah).
normal pad timing flow ->
10000000 01000010 01011010 01234567 01234567
|--------|--------|--------|--------|--------|
CMD | 01h | 42h | 00h | 00h | 00h |
|--------|--------|--------|--------|--------|
xxxxxxxx 10000010 10100101 01234567 01234567
|--------|--------|--------|--------|--------|
DAT | ---- | 41h | 5ah | SW.1 | SW.2 |
|--------|--------|--------|--------|--------|
device ID 'Z'
data contents of normal PAD.(push low)
+----------+----+----+----+----+----+----+----+----+
| byte | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+==========+====+====+====+====+====+====+====+====+
| +0 | ----- | N.A.
+----------+---------------------------------------+
| +1 | 0x41 | 'A'
+----------+---------------------------------------+
| +2 | 0x5a | 'Z'
+----------+----+----+----+----+----+----+----+----+
| +3 |LEFT|DOWN|RGHT| UP | STA| 1 | 1 | SEL|
+----------+----+----+----+----+----+----+----+----+
| +4 | [] | X | O | /\ | R1 | L1 | R2 | L2 |
+----------+----+----+----+----+----+----+----+----+
data contents NEGCON(NAMCO analog controler, push low)
+----------+----+----+----+----+----+----+----+----+
| byte | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+==========+====+====+====+====+====+====+====+====+
| +0 | ----- | N.A.
+----------+---------------------------------------+
| +1 | 0x23 |
+----------+---------------------------------------+
| +2 | 0x5a | 'Z'
+----------+----+----+----+----+----+----+----+----+
| +3 |LEFT|DOWN|RGHT| UP | STA| 1 | 1 | 1 |
+----------+----+----+----+----+----+----+----+----+
| +4 | 1 | 1 | A | B | R | 1 | 1 | 1 |
+----------+----+----+----+----+----+----+----+----+
| +5 | handle data right:0x00, center:0x80 |
+----------+---------------------------------------+
| +6 | I button ADC data (7bit unsigned) | 00h to 7Fh?
+----------+---------------------------------------+
| +7 | II button ADC data | 00h to 7Fh?
+----------+---------------------------------------+
| +8 | L button ADC data | 00h to 7Fh?
+----------+---------------------------------------+
unknown data bit length in +6 to +8 ADC datas. (7 or 8 may be)
mouse data contents(push low)
+----------+----+----+----+----+----+----+----+----+
| byte | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+==========+====+====+====+====+====+====+====+====+
| +0 | ----- | N.A.
+----------+---------------------------------------+
| +1 | 0x12 |
+----------+---------------------------------------+
| +2 | 0x5a | 'Z'
+----------+----+----+----+----+----+----+----+----+
| +3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
+----------+----+----+----+----+----+----+----+----+
| +4 | 1 | 1 | 1 | 1 |LEFT|RGHT| 0 | 0 |
+----------+----+----+----+----+----+----+----+----+
| +5 | V moves 8bitSigned up:+,dwn:-,stay:00 |
+----------+---------------------------------------+
| +6 | H moves 8bitSigned up:+,dwn:-,stay:00 |
+----------+---------------------------------------+
4. communicaion format in memory-card
memory-card starts data transfer after received command '0x81'
communication system uses 128-byte per one frame.
WRITE command
section size description
-------------------------------------------------------------------------
command header 4 memory write command(see figure)
address set 2 set a address for write(frames)
data block 128 write data for memory
XOR flag 1 exclusive-or code for data check
end status 2 result status from write command
end flag 1 end flag
-------------------------------------------------------------------------
total 138
command header address pointer
|--------|--------|--------|--------| |--------|--------|
CMD | 81h | 57h 'W'| 00h | 00h | | addr.H | addr.L |
|--------|--------|--------|--------| |--------|--------|
DAT | ---- | 00h | 5Ah 'Z'| 5Dh ']'| | 00h | addr.H |
|--------|--------|--------|--------| |--------|--------|
data block XOR flag
|--------|--------|--------|--------|--------| |--------|
CMD | dt 1 | dt 2 | .... | dt 127 | dt 128 | | xor |
|--------|--------|--------|--------|--------| |--------|
DAT | addr.L | dt 1 | .... | dt 126 | dt 127 | | dt 128 |
|--------|--------|--------|--------|--------| |--------|
end status end flag end flag(in case of error)
|--------|--------| |--------| |--------|
CMD | 00h | 00h | | 00h | | 00h |
|--------|--------| |--------| |--------|
DAT | 5Ch '\'| 5Dh ']'| | 47h 'G'| | 4Eh 'N'|
|--------|--------| |--------| |--------|
XOR flag = XOR datas in address pointer area and data block area statistics.
*) if case of error in write command(end flag = 'N'), never write.
example of write data(namco ridge racer)
output data from PlayStation
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F ASCII
+00 81 57 00 00 00 80 53 43 11 01 82 71 82 68 82 63 .W....SC..ＲＩＤ
+10 82 66 82 64 81 40 82 71 82 60 82 62 82 64 82 71 ＧＥ ＲＡＣＥＲ
+20 81 40 83 5E 83 43 83 80 83 65 81 5B 83 75 83 8B タイムテーブル
+30 00 CD 7B 7B 77 7B FB C7 FB D7 FB DB FB DB DD DB .ﾍ{{w{........ﾝﾛ
+40 DB DB DB DB 7D C7 CB CD FD FD FF FC B7 CC FD DC ﾛﾛﾛﾛ}ﾇﾋﾍ.....ﾌ.ﾜ
+50 FF DE FF FC FF FC DB FF DD FD DD FD FD DF C7 77 .ﾞ......ﾝ.ﾝ..ﾟﾇw
+60 C7 77 B7 77 B7 77 BC F7 7A EF 38 EB F5 E2 B3 DE ﾇwｷwｷwｼ...8..箋ﾞ
+70 71 D6 4F D2 EC C5 8A B9 48 AD E6 A0 DD D2 5D C6 qﾖOﾒ..柑Hｭ譬ﾝﾒ]ﾆ
+80 FE B9 7C AD 1A A1 1A 00 00 00 .ｹ|ｭ.｡....
output data from memory-card
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F ASCII
+00 01 00 5A 5D 00 00 80 53 43 11 01 82 71 82 68 82 ..Z]...SC..ＲＩＤ
+10 63 82 66 82 64 81 40 82 71 82 60 82 62 82 64 82 ＧＥ ＲＡＣＥＲ
+20 71 81 40 83 5E 83 43 83 80 83 65 81 5B 83 75 83 タイムテーブル
+30 8B 00 CD 7B 7B 77 7B FB C7 FB D7 FB DB FB DB DD .ﾍ{{w{........ﾝ
+40 DB DB DB DB DB 7D C7 CB CD FD FD FF FC B7 CC FD ﾛﾛﾛﾛﾛ}ﾇﾋﾍ.....ﾌ.
+50 DC FF DE FF FC FF FC DB FF DD FD DD FD FD DF C7 ﾜ.ﾞ......ﾝ.ﾝ..ﾟﾇ
+60 77 C7 77 B7 77 B7 77 BC F7 7A EF 38 EB F5 E2 B3 wﾇwｷwｷwｼ...8..箋
+70 DE 71 D6 4F D2 EC C5 8A B9 48 AD E6 A0 DD D2 5D ﾞqﾖOﾒ..柑Hｭ譬ﾝﾒ]
+80 C6 FE B9 7C AD 1A A1 5C 5D 47 ﾆ.ｹ|ｭ.｡\]G
read command
section byte description
-------------------------------------------------------------------------
command header 4 memory read command(see figure)
address pointer 4 address pointer for read(frame)
command reaction 1 received acknowlegde from memory.
data header 1 data header from memory.
data address 2 address of read data
data block 128 read data from memory-card
XOR flag 1 excrusive-or code for data check
end flag 1 end flag
-------------------------------------------------------------------------
total 140
command header address pointer command responce
|--------|--------|--------|--------| |--------|--------| |--------|
CMD | 81h | 52h 'R'| 00h | 00h | | addr.H | addr.L | | 00h |
|--------|--------|--------|--------| |--------|--------| |--------|
DAT | ---- | 00h | 5Ah 'Z'| 5Dh ']'| | 00h | 00h | | 5Ch '\'|
|--------|--------|--------|--------| |--------|--------| |--------|
data header data address
|--------| |--------|--------|
CMD | 00h | | 00h | 00h |
|--------| |--------|--------|
DAT | 5Dh ']'| | Addr.H | Addr.L |
|--------| |--------|--------|
data block XOR flag END flag
|--------|--------|--------|--------|--------| |--------| |--------|
CMD | 00h | 00h | .... | 00h | 00h | | 00h | | 00h |
|--------|--------|--------|--------|--------| |--------| |--------|
DAT | dt 1 | dt 2 | .... | dt 127 | dt 128 | | xor | | 47h 'G'|
|--------|--------|--------|--------|--------| |--------| |--------|
example of read data(namco ridge racer)
output data from PSX
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F ASCII
+00 81 52 00 00 00 80 00 00 00 00 00 00 00 00 00 00 .R..............
+10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+80 00 00 00 00 00 00 00 00 00 00 00 00 ............
output data from memory-card
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F ASCII
+00 01 00 5A 5D 00 00 5C 5D 00 80 53 43 11 01 82 71 ..Z]..\]..SC..Ｒ
+10 82 68 82 63 82 66 82 64 81 40 82 71 82 60 82 62 ＩＤＧＥ ＲＡＣ
+20 82 64 82 71 81 40 83 5E 83 43 83 80 83 65 81 5B ＥＲ タイムテー
+30 83 75 83 8B 00 CD 7B 7B 77 7B FB C7 FB D7 FB DB ブル.ﾍ{{w{......
+40 FB DB DD DB DB DB DB DB 7D C7 CB CD FD FD FF FC ..ﾝﾛﾛﾛﾛﾛ}ﾇﾋﾍ....
+50 B7 CC FD DC FF DE FF FC FF FC DB FF DD FD DD FD .ﾌ.ﾜ.ﾞ......ﾝ.ﾝ.
+60 FD DF C7 77 C7 77 B7 77 B7 77 BC F7 7A EF 38 EB .ﾟﾇwﾇwｷwｷwｼ...8.
+70 F5 E2 B3 DE 71 D6 4F D2 EC C5 8A B9 48 AD E6 A0 .箋ﾞqﾖOﾒ..柑Hｭ譬
+80 DD D2 5D C6 FE B9 7C AD 1A A1 1A 47 ﾝﾒ]ﾆ.ｹ|ｭ.｡.G
5. format in memory-card
(about format in 15 block's memory-card)
* blocked memory operate. 8Kbyte per block in 128KByte.
* top block is block allocation table.
list of block contents
block# name description
0 block allocation card ID, directory information
1 data block 1 data area
2 data block
| |
14 data block 14 data area
15 data block 15 data area
* 1 block is 64 separated frame. 128 byte par frame.
control block
frame# description
0 memory card ID
1-15 directory of data block 1 to 15(product #, flag information)
16-35 directory of data block(reserved)
36-62 N.A.
63 write test frame(used by card-menu)
*) control block has XOR-code in last data(+7Fh)
*) Memory card ID is maked 'MC.....'
frame contents in data block
frame description
+0 title(used by card-menu)
+1 character data(used by card-menu)
+2 character data(in case of take an animation in card-menu)
+2,+3.. saved data
