MSX VG-8020 joystick port 1 fails

By Giuseppe Di Lillo

Supporter (13)

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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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By Jipe

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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

By Giuseppe Di Lillo

Supporter (13)

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04-11-2015, 14:14

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

By Jipe

Paragon (1529)

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04-11-2015, 14:16

what is your model ?

By Giuseppe Di Lillo

Supporter (13)

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04-11-2015, 14:41

type vg8020/40

and below to the computer

By Jipe

Paragon (1529)

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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

By Giuseppe Di Lillo

Supporter (13)

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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?

By Jipe

Paragon (1529)

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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

By Giuseppe Di Lillo

Supporter (13)

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05-11-2015, 10:11

OK thanks to all the information

By Giuseppe Di Lillo

Supporter (13)

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05-11-2015, 11:41

error post
I was wrong to write

By Jipe

Paragon (1529)

Jipe's picture

05-11-2015, 11:06

what's error post ?