WD/900 component side. Note the memory expansion that was performed by piggybacking DRAMs and a few extra TTL parts. The 1791
Date: 05/16/2004
WD/900 circuit side
Date: 05/16/2004
WD/900 circuit side, closeup of floppy controller daughtercard. The DM1883B DMA controller is hidden from view by the daughterc
Date: 05/16/2004
WD/900 component side, lower right corner, showing WD/9000 Microengine chipset.
Date: 05/16/2004
WD/900 component side, upper right corner, showing floppy disk controller
Date: 05/16/2004
WD/900 component side, upper middle section, showing parallel port and floppy connector.
Date: 05/16/2004
WD/900 component side, lower middle section
Date: 05/16/2004
WD/900 component side, lower left corner, showing the DRAM array. This particular WD/900 has extra memory hacked on by piggybac
Date: 05/16/2004
WD/900 component side, upper left corner, showing the serial ports.
Date: 05/16/2004
WD/900 component side, upper right corner, with floppy disk controller daughterboard removed revealing DM1883B DMA controller ch
Date: 05/16/2004
Floppy disk controller daughterboard, component side
Date: 05/16/2004
Floppy disk controller daughtercard, circuit side
Date: 05/16/2004
WD/900 view from lower left corner, DRAM array in foreground offering better view of memory expansion hack.
Date: 05/16/2004
WD/900 view from lower left corner, closeup showing piggybacked TTL chip (near center of photo)
Date: 05/16/2004
WD/900 view from lower left corner, showing floppy disk controller daughtercard
Date: 05/16/2004