☭Computer:

Pentagon 1024SL
PLaying wiith friends:
http://pentagon.nedopc.com/cc06.htm

☭Upragades possibilites:

Extra RAM ranging from 256 KB to 4 MB
Several soundboard possibilities such as Covox, SounDrive or DMA UltraSound
additional video modes: 512x192 monochrome, 384x304, 256x192x15 (without using attributes)
CMOS with persistent real-time clock
IDE Controller for hard drives
"Turbo Mode" that clocks the CPU up to 7 MHz