MSX VG-8020 joystick port 1 fails

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

03-11-2015, 23:50

Hello everyone, I have a MSX VG 8020 that the door 1 has tracks routes, they can not be repaired
I can connect directly to the integrated wire that controls the port 1
where it is, which is the integrated
thank you

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Por Jipe

Paragon (1511)

Imagen del Jipe

04-11-2015, 12:29

exits many model of VG 8020 check the number near VG8020 /
the /00 have 2 x LS157 between the joystick port and the PSG

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

04-11-2015, 14:14

which are ? I can also connect the wires to integrated to rebuild the door

Por Jipe

Paragon (1511)

Imagen del Jipe

04-11-2015, 14:16

what is your model ?

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

04-11-2015, 14:41

type vg8020/40

and below to the computer

Por Jipe

Paragon (1511)

Imagen del Jipe

04-11-2015, 16:44

look inside your MSX
if you have a S3527 chip the joystik port is directly or also by self
if you have a real PSG YM2149 or other PSG the joystick port is decoded by 2 X 74LS157
search service manual 8020 on internet

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

04-11-2015, 19:02

l'integrato s3527 non è disponibile
I can connect the wires of the integrated 74LS157 to rebuild the port 1?

Por Jipe

Paragon (1511)

Imagen del Jipe

05-11-2015, 09:26

download this files is for VG8020/00 , i don't find /40
http://msx.hansotten.com/uploads/msxdocs/philipsvg802000sm.pdf
search the PSG and the joystick port and you find 74LS157
check the pinout before solder because is not the same version

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

05-11-2015, 10:11

OK thanks to all the information

Por Giuseppe Di Lillo

Supporter (13)

Imagen del Giuseppe Di Lillo

05-11-2015, 11:41

error post
I was wrong to write

Por Jipe

Paragon (1511)

Imagen del Jipe

05-11-2015, 11:06

what's error post ?