Philips VG-8235 (MSX2) Upgrading & Restoration
This poor computer was given to me in year 2015 but unfortunately it arrived at destination destroyed.
In these days i have decided to fix it and make some upgrades to make it more usable.
Upgrading & Restoration:
- General cleaning of external case and motherboards.
- Fixed the ventilation grid as the best i could do.
- Glued the pins where the screws lock the keyboard.
- Cleaning and Belt replacement of the 360k Floppy Drive.
- Replaced MASKROM MSX VG-8235 (U7) with an EPROM 27C512 with the firmware of the MSX VG-8245 to use 720k floppy disk on the internal drive.
- Replaced the original Floppy Drive with the GOTEK (HXC).
- Removed the battery for the system clock.
- Bypassed the impedance L1 on the power supply stage (solves video noise if the original Floppy Drive is not used)
- Rerouted Floppy Drive cable to make it compatible with a standard Floppy Drives.
- Fix for the missing signals of the Internal Floppy Drive but present on the external Floppy Drive (you need to solder 2 wires)
Gallery of the work done:
Download: MSX 8245 50hz Rom [27512] (950)
Categories: Projects / Repairs, Today, Various
Ciao nIGHTFALL,
grazie di tutte queste belle informazioni.
Sei un grande!!!!
Volevo sapere se sai a cosa serva il piccolo switch posto sulla mainboard dello VG8235, proprio accanto all’apertura della seconda porta cartridge.
Ha accanto la sigla SWI.
Grazie mille
Ciao
Alberto
@Alberto
Ciao Alberto, e’ un service Jumper che in alcuni MSX non e’ presente in quel posto e cambia pure label con ST1 , penso venga utilizzato con la Philips Test Cartridge , ho trovato qualcosa qui:
https://hansotten.file-hunter.com/special-msx-hardware/philips-test-cartridges/