The Philips VG8235 belongs to the MSX 2 standard. 

It is the successor of the the short-lived VG8230,
with only 64K RAM and without disk drive. 

Contrary to the other MSX computers, the Philips uses a custom chip
for the sound instead of the "classic" Yamaha YM-2149.

The computer can use all of its 128kB memory, the MSX-2 standard 
allows a computer to have 4 slots, which in turn can all have 4 sub-slots,
which can each hold a memory-mapper, which can be up to 4MB in size.
In theory, therefore, an MSX-2 computer can hold 4x4x4 = 64MB RAM.
However, the system ROM etc usually needs a (sub)slot, and so do
other periferals. 

It was followed by the VG 8245, a VG 8235 with a new case and double
sided diskdrive, then by the NMS8250, an MSX-2 model with detached keyboard,
the NMS8255, same as the NMS8250, but with two floppy drives built in,
and the (legendary) NMS8280, an MSX-2 computer with video-processing
capabilities built into it. 

(www.old-computers.com)