Here's something I thought the community would appreciate. Back in March I accepted an offer to acquire an old worn out machine from TAFE. This IBM PC-XT model 5160 was manufactured in 1986 in Wangaratta, Victoria, back when IBM was manufacturing computers in Australia. It had seen better days, covered in Limestone dust from its time used in an Adelaide Hills quarry and with all the various tool marks and abuse that comes with being disassembled and reassembled throughout its life. It worked, but it had certainly seen better days. The machine chassis was sand blasted to clean and prepare the surface for repainting in the factory colour. Because of the complexity of the chassis and my less than adequate painting skills, I chose to have the painting done by a professional paint shop and powder coater here in Adelaide. They had painted computer cases before, but nothing of this vintage. Even so, they did an incredible job. The inside of the power supply, which also serves as the main exhaust vent for the machine, was covered and choked with 30 years of dust. The power supply was dismantled back to the bare enclosure. All boards, switches and power connectors were removed and blasted with compressed air, with a stiff brush to remove any dust that had baked on the surface of boards and components. Every corner of the board and under every component was cleaned, nothing overlooked. The supply was then reassembled, bench tested and closed up. But it looked too good to not take at least one picture while it was still open. The motherboard, component cards and cables were all cleaned using the same compressed air and brushing process as the power supply. The components were then reinstalled in the freshly painted chassis and checked for alignment and card position to match the factory configuration. The machine powered up, so we were off to a promising start. There was still a lot of work to be completed. Some of the cabling on the hard drive needed to be repaired, many of the screws and the cork feet on the underside of the case needed to be replaced, the outer shell needs to be cleaned and I still needed to find a replacement 5.25" full-height floppy disk drive for it. After several months I was finally able to source a replacement IBM/Tandon 5.25" drive locally for a reasonable price. At the same time I managed to source an original Seagate ST-412 removed from an IBM XT, and so that went into the machine as well. (The MiniScribe drive has also been repaired and has since become a spare I swap in as needed.) I was encountering some inconsistent read and write issues with the Hard Disk, which ended up being a simple fix. This machine uses a later revision drive controller manufactured by IBM and Xebec called the IBM 20MB Fixed Disk Drive Adapter, which is configurable through a series of switches on the card. The card was configured for 615 cylinders, 4 heads and 17 sectors per track which is common to drives such as the 20MB MiniScribe 8425 and Seagate ST-225, but the Seagate ST-412 in the machine has 306 cylinders. With the drive controller correctly configured, the ST-412 successfully low-level formatted with the IBM Advanced Diagnostics disk. Then it was simply a matter of partitioning the drive, formatting and installing MS-DOS. I settled on MS-DOS 5 because it was one of the few working disks I had available. Performing a surface scan with SpinRite shows that despite the age of this drive, it's in remarkably good running condition. No bad sectors and the motor and stepper seek sounds are whisper quiet. Not bad for a 30 year old drive. In addition to the drives, I also sourced a Paradise 8-Bit VGA card to allow the XT to drive newer displays. (The IBM CGA card is still installed and can still be selected as the main video output by moving some switches on the system board.) After a frantic scramble to reassemble the machine in time, the still incomplete IBM went on display at the Adelaide Retro Computing Group December event. No software to demonstrate at this time, but that will come later. Some improvements still to be made: Replace case screws with original replacements or replicas Reattach factory case badges and labels Replace cork disc case feet Replace internal MFM and FDD ribbon cables with IBM factory originals (current ones are a bit chewed up, but will be good as spares) Add Microbee CGA-VGA adapter for IBM Color Graphics card video output Add AdLib or Creative (CMS/Sound Blaster) 8-Bit Audio Card (if I can find one, or compatible Yamaha YM3812 OPL2 card) Restore XT Keyboard (it's currently a lot yellower than it should be) A member of the retro computing group donated two packs of 5.25" floppies to the cause, which has made data transfer between machines much easier and allowed me to confirm the Tandon 5.25" drive is reading and writing correctly (we tested between some other IBM machines present on the night). Still working out what to do with the machine when it's finished and what software to run on it, but I think it would be interesting to generate some 8-bit music with it at some point. I know there are better machines for this but I've come to like this IBM. Cheers, Michael (iMic).