MSX CONNECTORS AND CABLES


Most MSX connectors can be found on the HardwareBook, but I'm trying to find out if I can put these schemes in this page. So, please be patient. The same goes for Mayer's I/O Map.

Fortunately, Giovanni R. Nunes sent me some important connectors in ASCII art... Thanks!

Note that none of the editors (including me, Manuel Bilderbeek) is responsible for any damage caused by errors in this page! Cables are made at your own risk. And, it's not guaranteed that there are no errors in the schemes!


Cassette connector

(Giovanni R. Nunes)

DIN 8 pins (female)


   7   6          1 GND         5 CMTIN  I
  3  8  1         2 GND         6 REM +  O
   5   4          3 GND         7 REM -  O
     2            4 CMTOUT  O   8 GND
Note: the MSX built by Gradiente in Brasil (the Expert) has another pin-layout:

DIN 5 pins (female)


    .     .
   3   .   1
    5     4
       2

  Pin   Name    I/O
  =================
  1     REM      O
  2     GND
  3     REM      O
  4     CMTIN    I
  5     CMTOUT   O

Joystick connector

(Giovanni R. Nunes)

DB 9 pins (male)


  1 2 3 4 5      1 FWD    I       5 +5V
   6 7 8 9       2 BACK   I       6 TRG 1  I/O
                 3 LEFT   I       7 TRG 2  I/O
                 4 RIGHT  I       8 OUT    O
                                  9 GND
If a mouse is connected to a joystick-port, the pins are used as follows:
(Laurens Holst and Giovanni R. Nunes)


 1 data b0    (in)
 2 data b1    (in)
 3 data b2    (in)
 4 data b3    (in)
 5 +5V        (out)
 6 trigger 1  (in)
 7 trigger 2  (in)
 8 strobe     (out)
 9 ground
The system works as follows:

The MSX Mouse sends 2 signed bytes to the computer, X and Y. This byte must be added to the current X and Y location, so it is a relative movement. So X=0 means X is the same, X=1 means X=+1 and X=255 means X=-1. This is very easy to implement, however it poorly supports mouse speed control, because it's a digital signal. Well, anyways, those 2 bytes are transferred in 4 parts. The computer reads pins 1-4 four times, afterwards signalling the mouse to ready the next 4 bits by complementing pin 8.


Printer connector

(Giovanni R. Nunes)

Centronics 14 pins (female)


  07-06-05-04-03-02-01       1 PSTB  O   8 PDB6  O
 |                    |      2 PDB0  O   9 PDB7  O
  14-13-12-11-10-09-08       3 PDB1  O  10 NC
                             4 PDB2  O  11 BUSY  I
                             5 PDB3  O  12 NC
                             6 PDB4  O  13 NC
                             7 PDB5  O  14 GND
Note: the MSX built by Gradiente in Brasil (the Expert) has another connector:

I don't know the name but it is the same connector of flat cables, male with 26 pins (is equal to the parallel connector of a Pentium's motherboard with built-in IDE controler).


  25                        1
   . . . . . . . . . . . . .
   . . . . . . . . . . . . .
  26                        2

  from 2 to 24 = GND
  19,23,25 and 26 not conected

  Pin   Name
  ================
   1    STROBE
   3    D0
   5    D1
   7    D2
   9    D3
  11    D4
  13    D5
  15    D6
  17    D7
  21    BUSY

RGB - SCART cable

(sent through the MSX Mailinglist by Maarten ter Huurne [mth@stack.nl])

It's for the Sony HB-F700, but it supposed to work for the Turbo-R and the Sanyo Wavy MSX2+ too.

SONY HB700 RGB plug: (seen from cable side)



      7       6

     3    8    1

      5       4
          2
SCART connector: (seen from cable side)

+---------------------------------------------+
 \  20  18  16  14  12  10   8   6   4   2    |
  \                                           |
  |   19  17  15  13  11   9   7   5   3   1  |
  +-------------------------------------------+
How to connect:

RGB:  Description:     SCART:
 1    audio ground        4 (and 5, 9, 13, 14, 18 to be sure)
 2    audio right         2 (and 6 (mono))
 3    status CVBS         8
 4    CVBS               20
 5    status RGB         16
 6    red                15
 7    green              11
 8    blue                7
I hope this is correct. If something is wrong, please mail me about it.

Bye, Maarten

Extra remarks by Alwin Henseler:
The signal on pin 3 (status RGB) functions like a switch signal, where any voltage from +3 to +12 volt signals 'on', and anything below that indicates 'off'. This is for instance used if you're connecting your computer to a TV with SCART input. In that case, the TV will automaticly switch to display of the RGB (SCART) signal when the computer is turned on.
It is usually connected to +12V (sometimes only some 5V, but this should work the same) through some series resistor.

The Sony F700 and Sanyo Wavy only put a composite sync signal (no complete video, only synchronisation signals) on pin 4, where the Turbo-R seems to put a complete composite video signal on this pin. An RGB monitor only uses this to extract the synchronisation signals, and therefore either composite sync, or composite video will do.

The signal on pin 5 (Ys, or luminance) is not really a signal, but carries a constant voltage of some 3 to 4 volts. Some monitors seem to need this though.


SCART connector (Philips: Audio/Video out, Sony: RGB)


+---------------------------------------------+
 \  20  18  16  14  12  10   8   6   4   2    |
  \                                           |
21|   19  17  15  13  11   9   7   5   3   1  |
  +-------------------------------------------+

Pin  Name				I/O  Signal level 		Imp.
--------------------------------------------------------------------------------
1    Audio out (right)   		O   nom: 0.5V, max: 2V less than 1kOhm
2    Audio in (right)    		I   nom: 0.5V, max: 2V more than 10kOhms
3    Audio out (left) (+Mono)  		O   nom: 0.5V, max: 2V less than 1kOhm
4    Audio GND
5    RGB Blue GND
6    Audio in (left)     		I   nom: 0.5V, max: 2V more than 10kOhms
7    RGB Blue out            		O   0.7Vpp			75 Ohms
8    Status CVBS	 		O   0: 0.2V; 1: 9.5-12V
9    RGB Green GND
10   NC or Data 2: Clockpulse Out
11   RGB Green out           		O   0.7Vpp			75 Ohms
12   NC or Data 1: Data Out
13   RGB Red GND
14   Data line GND
15   RGB Red out or Chrominance (SVHS)	O   0.7Vpp (Chrom.: 0.3V burst)	75 Ohms
16   Status RGB/blanking 		O   0: 0-0.4V=Comp., 1:1-3V=RGB	75 Ohms
17   CVBS/video GND
18   Status RGB GND
19   CVBS/video out	 		O   1Vpp (comp. video)
20   CVBS/video in or Luminance (SVHS)	I   1Vpp (comp. video)
21   Socket GND

Monitor connector Philips

(Erik de Boer)

8 pin DIN


   7      6       7 NC                     6 +12V

3     8     1     3 AUDIO      8 NC        1 +5V

  5        4      5 CVBS (color video PAL) 4 Ys (monochrome)
       2                       2 gnd           ('luminance')

Monitor connector Sony (Audio/Video)

(Ivan Latorre/Saku Taipale)

This connector can at least be found on a HB-101P, HB-201P and HB-501P. A method to make a cable to RCA plugs is described here.

If your monitor/TV is mono you need one DIN-6 male connector and two RCA male connectors to make a cable (one RCA connector for video and one for audio). Usually, the two female RCA connectors of the TV are of colours yellow (video) and black (audio).

If it is stereo then you need one DIN-6 male connector and three RCA male connectors (one RCA connector for video and two for audio). Your MSX will always output mono sound though; it's just to be sure that we'll hear sound on both speakers. Usually, the three female RCA connectors of the TV are of colours yellow (video), red (right audio) and white (left audio).

External view of the female DIN-6 connector of the computer:


5     1          1  +12V
   6             2  VIDEO OUT
4     2          3  GND
   3             4  AUDIO LEFT OUT
                 5  -
                 6  AUDIO RIGHT OUT

Male RCA connectors:


              -----------------
          ----|               |
       -------|               |
tip -> -------|               |
          ----|               |
           ^  -----------------
           |
        sleeve

For mono monitor/TV


RCA video connector (yellow)    DIN6
tip    				2
sleeve 				3
--------------------------------------
RCA audio connector (black)	DIN6
tip    				4 or 6

For stereo monitor/TV


RCA video connector (yellow)    DIN6
tip    				2
sleeve 				3
--------------------------------------
L-audio RCA connector (white)   DIN6
tip    				4
--------------------------------------
R-audio RCA connector (red)	DIN6
tip    				6

RGB Monitor connector Gradiente Expert

(Giovanni R. Nunes)

DIN 8 pins (female)


    7     6
   3   8   1
    5     4
       2

  Pin   Name
  ================
  1     Compose Sync
  2     GND
  3     Red
  4     Blue
  5     Green
  6     +Vcc (+12V)
  7     Y (Luminance)
  8     Audio

RGB connector (Japanese models)

(Giovanni R. Nunes, Fabio Ricardo Schmidlin)

This is the standard MSX RGB pinout according to the MSX-Datapack.

DIN 8 pins female


  1       GND
  2       Audio
  3       AV (*1)
  4       C SYNC (*2)
  5       YS (*3)
  6       R
  7       G
  8       B

          7   6
         3  8  1
          5   4
            2
(View from plug - male)

Notes:
*1: Composite Video (aka CVBS). May be NC, or fixed to 1.8V via pull-up resistor in some models
*2: Composite sync. The signal level is 1.8Vpp (composite video standard). May be mixed either with Luma or Composite video itself (Panasonic machines). This means that it has to be passed through a sync cleaner and level adjuster to be able to be used in monitors that expect a TTL signal
*3: +3V~+5V signal, used to switch the TV to the RGB input. Also allows superimposing on SCART and RGB21 TVs if the MSX has such hardware built-in. Shouldn't be used as Vcc


MSX standard AV DIN-5 connector (MSX-Datapack)

(Fabio Ricardo Schmidlin)
Seen on: Yamaha CX-5M (US model), Sony HB-10


  1       +5V
  2       GND
  3       AUDIO
  4       VIDEO
  5       RF VIDEO (*1)

    U
  3   1
  5   4
    2

Notes:
*1: This is meant to be connected to the antenna input of the old TVs that had no other input connector. The image of this standard is of extremely low quality. It's unconnected on most models.


Yamaha CX-5Mx RGB connector

(http://www.rgp.nl/cx5m/conn.htm)

Video/audio out CX-5MG, CX-5MS, CX-5ME, CX-5MA, CX-5MF: 8 pin DIN-like connector. Connect with RCA type pin connection cables. Seems to be the same as the standard 8-pin DIN RGB connector of the MSX-Datapack, see above.


  1       GND
  2       SOUND
  3       AV
  4       Y
  5       YS
  6       R
  7       G
  8       B

          7   6
         3  8  1
          5   4
            2

SCART connector (Japanese, RGB21)

(Giovanni R. Nunes)



          GND    GND
      B   |  Ys   |
      |   |   |   |
   +--|---|---|---|---------------------------+
   |  |   |   |   |                           |
   | [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]--+-- 2
   |                                          |
  [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]-+-- 1
   |   |   |   |   |   |   |                  |
   +---|---|---|---|---|---|------------------+
       |  GND  |  GND  |  GND
       G       R    C SYNC
(View from plug - male)

Philips CM-8833-II RGB connector

(The Red Devil)

This is a popular monitor for MSX computers, but unfortunately it does not have a SCART connector. The connector is a 9-pin sub-D one... Here's the description:

At the back of CM-8833II:



  5 4 3 2 1

   9 8 7 6

Pin   Description
-----------------
 1    ground
 2    ground
 3    red
 4    green
 5    blue
 7    status RGB
These are the signals you need for an RGB out of a Sony 700 or a SCARTplug. The sound can be connected to the seperate Audio-in connector on the monitor.

Commodore 1084s DIN RGB-connector/SCART modification

(Jorrith Schaap/Saku Taipale)

How to connect a Commodore 1084s monitor to your Sony 700... Only for 1084s monitors with DIN connectors at the back, other models of this monitor have a 9 pin SUB-D connector at the back, and pinout should be the same as on the CM8833-II (see previous).

Use the 6 pins DIN connector at the back of the 1084s (analog RGB) for the following cable to work. Also, use a separate cinch cable for the audio signal, since the 1084 won't receive audio through the DIN connector. These pins are marked with an 'x', so make a separate cable for this if you want sound.


   3
2     4
1     5
   6
1 = Green
2 = HSYNC
3 = Ground
4 = Red
5 = Blue
6 = VSYNC

To connect this monitor to the Sony HB-F700, you can use this info to extract the following scheme (see above for the HB-F700/turboR RGB connector):


From:		To:		Function:
MSX, 8 pin DIN	1084, 6 pin DIN
=========================================
1		3 / x		Ground
2		x		Audio left
3		n/c		Status CVBS
4		2		CVBS
5		n/c		Status RGB
6		4		Red
7		1		Green
8		5		Blue
Do not forget to ground everything to get a stable image.

Note: we thought it would also work on the MSXturboR, since it's RGB connector is very similar to the one in the Sony 700 series. But it did not work! To let it work on an MSXturboR, we recommend to build a SCART connector into the 1084s. The monitor is prepared for this. The drawback is that you need to do quite some modifications. To make those modifications, you have to look carefully to the instructions on the circuit board. This is how Saku Taipale describes it:
There is a set of jump wires in the monitor and some of them are left away from the 1084 which doesn't have a scart connector. Jump wire connection points are marked as a line from hole to hole in the board and are also numbered.

I connected these wires: 9202 9206 9212 9247 9270 9274 9275 9289 9290 9331, R533 (this is a place for resistor, but I put wire there instead).

Connect these connection points with a long wire (they have triangle marked in the connection hole):
24 - 49
22 - 50
69 - 44

Next: the resistors. Here is the list of resistors with the values (in Ohm) I used, the code in mainboard is same Rxxx.

codevalue        codevalue
R210 22R403 39k
R220 75R502 100
R303 22kR504 390
R304 15kR530 1k
R305 5.6kR537 4.7
R306 5.6kR538 10k
R307 18kR541 15k
R308 100kR548 68
R309 15kR545 39
R310 47kR546 150
R311 100kR547 39
R312 47kR551 1.2k
R313 15kR563 5.1k
R314 1.5kR624 10k
R315 15kR625 100
R402 4.7kR626 2.2k

Capacitors, marked also in the mainboard, just find the right places...:

codevoltagevalueremark
C30850V1uF 
C31216V10uF 
C313 560nF(?, has mark B561 in it)
C31416V47uF 
C315 220nF 
C40125V2.2uF 
C53716V47uF 
C54416V22uF 
C545 68nF 
C548 680nF(?, B681)
C568 22nF 

Transistors:

codetransistor type
TS310C548B
TS313C548B
TS315C548B
TS405C548B
TS544C548B

Diodes: D601 D602 D603 D604 D605.

And also, remember to buy the male (90 degree turn in the legs) scart-connector for your modification!


S-Video connector (Turbo R)

(Giovanni R. Nunes)

4 pin mini-din female


   4   3
  2     1
    ---

  Pin   Description
  1     GND (Y)
  2     GND (C)
  3     Y (intensity = luminance)
  4     C (color = Chrominance)

Sunrise GFX9000 video output

The GFX9000 of Sunrise has a sub-D connector for video output. This is the pin-out:


._________________.
\  5  4  3  2  1 /
 \   9  8  7  6 /
  `------------'

Pin	Signal		I/O
----------------------------
1	GND		-
2	GND		-
3	Red		O
4	Green		O
5	Blue		O
6	Status RGB	O
7	CVBS *		O
8	Audio Left **	O
9	Audio Right **	O
*: this pin doesn't contain any video signal, only a composite sync signal.
**: only in Video9000
So, for Video9000 you also have audio output!

Video Interface Sony HB-G900P

This is the description of the Video Interface which is on the Sony HB-G900P. It is used to connect the Sony HBI-G900P Videotizer. The schematics are taken over from the "Operating Instructions" of the Sony HB-G900P.


.________________________________________________________.
\ 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1 /
 \36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19/
  `---------------------------------------------------'

Pin No.	Signal		Signal Level
-----------------------------------------------
1	Video input	1.0 V p-p, 75 ohm term.
2	Video output	1.0 V p-p, 75 ohm term.
3	R		0.7 V p-p, 75 ohm term.
4	G		0.7 V p-p, 75 ohm term.
5	B		0.7 V p-p, 75 ohm term.
6	Ys		TTL
7	Ym		No-connect
8	SYNC		TTL
9	BF		TTL
10	SYM0		TTL
11	VIDEO/NO VIDEO	TTL
12	C0 (B1)		TTL
13	C2 (R0)		TTL
14	C4 (R2)		TTL
15	C6 (G1)		TTL
16	RCA/21 pin	TTL
17	SC		TTL
18	DLCLK		TTL
19-24	GND
25	Computer Sync	TTL
26	ALT		TTL
27	BLK		TTL
28	SYM1		TTL
29	GND
30	C1 (B2)		TTL
31	C3 (R1)		TTL
32	C5 (G0)		TTL
33	C7 (G2)		TTL
34-36	GND

MSX Cartridge connector/bus expansion/extension side slot

(Giovanni R. Nunes)

Female 50 pin connector


                                        +---+
   1:/CS1          2:/CS2             1 |= =| 2
   3:/CS12         4:/SLTSL             |= =|
   5: RSV(N.C)     6:/RFSH              |= =|
   7:/WAIT         8:/INT               |= =|
   9:/M1          10:/BUSDIR            |= =|
  11:/IORQ        12:/MERQ              |= =|
  13:/WR          14:/RD                |= =|
  15:/RESET       16: RSV(N.C)          |= =|
  17: A 9         18: A15               |= =|
  19: A11         20: A10               |= =|
  21: A 7         22: A 6               |= =|
  23: A12         24: A 8               |= =|
  25: A14         26: A13               |= =|
  27: A 1         28: A 0               |= =|
  29: A 3         30: A 2               |= =|
  31: A 5         32: A 4               |= =|
  33: D 1         34: D 0               |= =|
  35: D 3         36: D 2               |= =|
  37: D 5         38: D 4               |= =|
  39: D 7         40: D 6               |= =|
  41: GND         42: CLOCK             |= =|
  43: GND         44: SW1               |= =|
  45: +5V         46: SW2               |= =|
  47: +5V         48: +12V              |= =|
  49: SOUNDIN     50: -12V           49 |= =| 50
                                        +---+
Short description of the pins:
(from Philips VG8235 manual)

 1    ROM addresses 4000-7FFF select signal
 2    ROM addresses 8000-BFFF select signal
 3    ROM addresses 4000-BFFF select signal (for 256k ROM)
 4    Slot select signal
 5    Reserved signal line - use inhibited
 6    Refresh cycle signal
 7    CPU's WAIT request signal
 8    Interrupt request signal to CPU
 9    Signal expressing CPU fetch cycle
10    This signal controls direction of external databus buffer
      Cartridges are selected and L level is output from each
      cartridge at data transmission time
11    I/O request signal
12    Memory request signal
13    Write timing signal
14    Read timing signal
15    System reset signal
16    Reserved signal line - use inhibited
17-32 Address bus signals
33-40 Data bus signals
41    Signal ground
42    CPU clock 3.579545MHz
43    Signal ground
44,46 For insertion/removal protect
45,47 +5V power source
48    +12V power source
49    Sound input signal (-5bdm)
50    -12V power source
Gradiente's Expert has not this standard MSX connector but a so-called BUS Expansion. These expansions are used in the first japanese MSX1 models but, perhaps because it isn't a ASCII standard was "dead". In Expert's case it is a copy of the second SLOT and was reserved for expansions but not used for "MSX industry" in Brazil. It is the same pinout of MSX cartridge but... it looks like a SCSI Harddisk connector (50 pins....)

Compare:
MSX cartridge:


  2       50
    (...)
  1       49
The BUS Expansion:

  49     1
    (...)
  50     2
The major use of it was for transforming Expert MSX1 machines in MSX2 models, expanding the SLOT B and putting in it the V9938, ROMS and Mapper...

The information is on courtesy of Alex Mitsio Sato directly from his Expert User's Manual... :)

The Yamaha CX-5M has (apart from a normal MSX cartridge slot) also the so-called "Extension side slot". A 60 pin expansion port. According to the manual it's pin assignment is as follows:
(http://www.rgp.nl/cx5m/conn.htm)


No. Name         I/O     No. Name         I/O     No. Name        I/O
--------------------     --------------------     -------------------
1   SOUND OUT     O      2   GND                  3   GND
4   Phase Control I      5   Y	           O      6   B-Y          O
7   C VIDEO       O      8   R-Y	   O      9   EXT CLOCK    I
10  CLOCK INT/EXT I      11  CS1	   O      12  CS2          O
13  CS12	  O      14  SLTSL         O      15  N/C          -
16  RFSH	  O      17  WAIT	   I      18  INT          I
19  MI		  O      20  NO CONNECTION -      21  IORQ         O
22  MERQ	  O      23  WR            O      24  RD           O
25  RESET	  O      26  N/C	   -      27  A9           O
28  A15		  O      29  A11	   O      30  A10          O
31  A7		  O      32  A6	           O      33  A12          O
34  A8 		  O      35  A14	   O      36  A13          O
37  A1		  O      38  A0	           O      39  A3           O
40  A2		  O      41  A5	           O      42  A4           O
43  D1           I/O     44  D8	          I/O     45  D3          I/O
46  D2           I/O     47  D5	          I/O     48  D4          I/O
49  D7 		 I/O     50  D6 	  I/O     51  GND          -
52  CLOCK	  O      53  GND	   -      54  SW1          -
55  +5V           -      56  SW2	   -      57  +5V          -
58  +12V	  -      59  SOUND IN      I      60  -12V         -

Diskdrive connector (34pin)

(Erik de Boer)

The scheme is the connector on the diskdrive, not the connector on the flatcable!


                          ___
  |---------------------|     |-------------------- |
   2  4  6  8 10 12 14 16 18 20 22 24 26 28 30 32 34
   1  3  5  7  9 11 13 15 17 19 21 23 25 27 29 31 33
  |-------------------------------------------------|

2  Dchange* 1  in use*
4  NC       3  gnd
6  DS3*     5  gnd
8  index    7  gnd
10 DS0      9  gnd
12 DS1      11 gnd
14 DS2*     13 gnd
16 M on     15 gnd
18 dirc     17 gnd
20 step     19 gnd
22 Wdata    21 gnd
24 Wgate    23 gnd
26 TR00     25 gnd
28 WP       27 gnd
30 Rdata    29 gnd
32 sidesel# 31 gnd
34 ready    33 gnd
Note: all signals have negative logic *) Normally not used
#) Only for double sided drive

Diskdrive connector VG8230/35, NMS8245

(Erik de Boer)

Internal connector VG8230/35, NMS8245:


PIN NAME/DESCRIPTION
 1   index
 2   dirc
 3   step
 4   W data
 5   W gate
 6   ds0
 7   ds1
 8   side select (only 8245)
 9   nc
 10  M on
 11  gnd
 12  Tr00
 13  WP
 14  R data
Note: all signals have negative logic

External drive connector VG8235:


33                              1
o o o o o o o o o o o o o o o o o
o o o o o o o o o o o o o o o o o
34                              2

  Pin  Signal		Pin  Signal
  ---------------------------------
  1    NC		2    NC
  3    RETURN		4    /IN USE
  5    RETURN		6    /DRIVE SELECT 3
  7    RETURN		8    INDEX
  9    RETURN		10   /DRIVE SELECT 0
  11   RETURN		12   /DRIVE SELECT 1
  13   RETURN		14   /DRIVE SELECT 2
  15   RETURN		16   /MOTOR ON
  17   RETURN		18   /DIRECTION
  19   RETURN		20   /STEP
  21   RETURN		22   /WRITE DATA
  23   RETURN		24   /WRITE GATE
  25   RETURN		26   /TRACK 00
  27   RETURN		28   /WRITE PROTECT
  29   RETURN		30   /READ DATA
  31   RETURN		32   (/HEAD SELECT) (only 8245?)
  33   RETURN		34   /READY

Second diskdrive connector SpectraVideo

(Giovanni R. Nunes)


  13                           1
     o o o o o o o o o o o o o
      o o o o o o o o o o o o
   25                          14

  Pin   Name           Description
  1     +12V           +12 VDC
  2     +5V            +5 VDC
  3     +5V            +5 VDC
  4     /INDEX         Sector hole passed sensor.
  5     /DSEL1         Drive Select 1
  6     DIR            Direction (0=In, 1=Dir)
  7     /STEP          Moves head 1 step in DIR direction.
  8     WRITEDATA      Write Data
  9     /WRITEGATE     Write Gate
  10    /TRACK00       Head is over Track 00 (outermost track)
  11    /WRITEPROTECT  Write protected disk (0=Write protected)
  12    READDATA       Data read from diskette.
  13    /SIDESELECT    Side Select (0=Side 1, 1=Side 0)
  14    +12V           +12 VDC
  15    +12V           +12 VDC
  16    +5V            +5 VDC
  17    /DSEL1         Select Drive 0
  18    /MOTOR         Motor On
  19    READY          Ready
  20    GND            Ground
  21    GND            Ground
  22    GND            Ground
  23    GND            Ground
  24    GND            Ground
  25    GND            Ground
(view from computer)

Diskdrive connector MSX Turbo R

(Erik de Boer)

24 lead flat cable


1  -- +5V
2  -- +5V
3  -- NC
4  -- +5V
5  -- +5V
6  -- READY
7  -- GND
8  -- GND
9  -- SIDE SELECTION
10 -- GND
11 -- READ DATA
12 -- WR PROTECT
13 -- TRC 00
14 -- WRITE GATE
15 -- GND
16 -- WRITE DATA
17 -- GND
18 -- STEP
19 -- DIRC.
20 -- M-ON
21 -- NC
22 -- DRIVE SELECTION
23 -- INDEX
24 -- DISK CHANGE
(I don't know the use of disk change sinds the ready signal is also present, normally they won't go together.)

Laptop diskdrive (26pin) to 34 pin MSX drive connector

(Werner Augusto Roder Kai)


FDD-pin  MSX drive connector      signal name
(26)     (34)
----------------------------------------------------------------
1        - (from powersource)     +5V
2        8			  Index
3        - (from powersource)     +5V
4        10			  Drive select 0 for drive A: or
         12			  Drive select 1 for drive B:
5        - (from powersource)     +5V
6        Not connected		  Disk change
7        Not connected		  Reserved
8        34			  Ready
9	 Not connected		  Media
10	 16			  Motor on
11	 Not connected		  Density select
12	 18			  Direction
13	 Not connected		  In use
14	 20			  Step
15	 odd pins and powersource Ground, 0V
16	 22			  Write data
17	 odd pins and powersource Ground, 0V
18	 24			  Write gate
19	 odd pins and powersource Ground, 0V
20	 26			  Track 00
21	 odd pins and powersource Ground, 0V
22	 28			  Write Protect
23	 odd pins and powersource Ground, 0V
24	 30			  Read data
25	 odd pins and powersource Ground, 0V
26	 32			  Side 1 select

ESE's Harukaze Serial Port (9)

(Giovanni R. Nunes)

DB 9 pin (I don't remember but may be male like PCs)


  PIN   NAME    DIR     DESCRIPTION
  ------------------------------------------
   1    CD      I       Carrier Detect
   2    RXD     I       Recieve Data
   3    TXD     O       Transmit Data
   4    DTR     O       Data Terminal Ready
   5    GND     -       System Ground
   6    DSR     I       Data Set Ready
   7    RTS     O       Request to Send
   8    CTS     I       Clear to Send
   9    RI      I       Ring Indicator

  1 +-------------+ 5
     \ o o o o o /
      \ o o o o /
     6 +-------+ 9
(view from cartridge)

Standard RS-232

(Giovanni R. Nunes)

DB 25 (standard connector in serial periphericals)


  PIN   NAME              PIN   NAME
   1    GND               14    S.TXD
   2    TXD               15    TXC
   3    RXD               16    S.RXD
   4    RTS               17    RXC
   5    CTS               18    -
   6    DSR               19    S.RTS
   7    GND               20    DTR
   8    CD                21    SQD
   9    -                 22    RI
  10    -                 23    SS
  11    -                 24    TXC
  12    S.CD              25    -
  13    S.CTS

(Erik Maas)

DB 9 (also standard connector)


  PIN     NAME    DESCRIPTION
   1      CD	  Carrier detect
   2	  Rx	  Receive Data
   3	  Tx	  Transmit Data
   4 	  DTR	  Data Terminal Ready
   5	  GND	  System Ground
   6	  DSR	  Data Set Ready
   7	  RTS	  Request To Send
   8	  CTS	  Clear to Send
   9	  RI	  Ring Indicator (n.c.)

Power-supply connector SVI-728



   ,----------.
  1| o      o |2
  3|   o  o   |4
   `----------'
Contacts 1 - 2: AC 16V 0.8A
Contacts 3 - 4: AC 9V 1.5A

Power-supply connector Yamaha CX5M

This is a 13-pin DIN-like connector. The view is as seen on the male connector of the power supply.


        13
  12  11  10  9
   8   7   6  5
   4   3   2  1
        /\
Contacts 1, 6, 10, 13: DC +5V, 1.9A
Contacts 2, 7, 11, 12: 0V
Contacts 3, 8: DC +12V, 0.5A
Contacts 4: DC -12V, 0.16A
Contacts 5 and 9 connect to the switch.

Power-supply connector Panasonic FS-A1

The Panasonic FS-A1 (and possibly other machines by Panasonic) needs a separate power supply. The original supply is the "AC Adaptor FS-AA51". The input on the machine is a 3 pin male connector, the output of the power supply is hence a female connector. According to the text on the power supply, this is the pinout:


      _____
   1 /  o  \
    |       |
  2 | o   o | 3
    +-------+
Pin 1: DC 9V 1.2A (+)
Pin 2: AC 18V 170mA
Pin 3: ground (-)

The input of the power supply is AC 100V - 50/60Hz 23VA.


I/O connector Pioneer LD-700/LD-7000

(Saku Taipale)

This is the I/O connector on the LD-700 (should be same as LD-7000):


  7  1
       4
a   b   c
       i
  g  h

First, the functions of these pins (from LD-700 manual, so direction is from the LD-700's perspective):


PIN DIR NAME
 1   I  INT/ /EXT
 4   O  /EXT ACK
 7   I	EXT CONTROL
 a   -	GND (this is also the shielding)
 b   O  +11V (do not use as a powersource)
 c   O  RF
 g   -  NC
 h   -  NC
 i   O  VIDEO (75 Ohm)

Note: the pin numbering is taken from the Pioneer PX-7 manual. A bought plug for the I/O connectors may have a different numbering! To connect the LD to the MSX, you only need the numbered pins:


From MSX		LD-700(0)
---------------------------------
1	 INT/EXT	1
4	 EXT ACK	4
7	 EXT Control	7

So, it is a one to one cable.


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