How to build a 1 GHz IBM XT

using an original IBM XT case, an ASUS P2B-B Rev. 1.02 motherboard (Baby AT format), an appropriate Socket 370->Slot 1 adapter and an Intel Celeron or Pentium III 1 GHz (FCPGA) processor

go back to Part 1: Mounting the ATX power supply
go back to Part 2: Mounting the mainboard

Part 3: Mounting the I/O devices

The next step is to integrate typical I/O into the IBM XT case like a 1.44 MB diskette drive, a DVD ROM drive, and a typical disk drive.
As you can see below, I used metal plates to fix the upper diskette drive together with the lower DVD ROM drive. The metal plates came with a IBM RS/6000 530 H and were used to attach disk drives one above the other. It should be no problem for the adept hobbyist to create those plates from a simple plate and just drill four holes into them.

You only need one plate for each bay. On the inner side of each bay, I just bent two PCI/ISA adapter slot plates into a U-shape so that they just support the drives from below. The drives are not fixed with screws to those plates and are only fixed on the outer side of each bay. The disk drive touches only one of the plates (invisible in this picture). However, I fixed the two plates with one nut and bolt each.

In the next picture, you can see both plates as viewed from the front of the case:

The next pictures show the left drive bay from the front side of the case. (Please note that in this picture, the drive is not fixed at the rear left in order to be able to lift the drive and mount the mainboard):

The left plate has to be bent at the rear or it will touch the lock of the mainboard's DIMM socket as mentioned above:

Now you should be safe to fix your mainboard again.

proceed to Part 4: Mounting the CPU and adding two front USB slots