Fixing and improving the IBM PC/AT 5170 BIOS (bonus shorted tantalum fix)

The IBM PC/AT 5170 has some issues with the stock BIOS that causing boot time errors and also prevent you from using a IDE hard drive/CF card/SD card with the machine. Normally people replace the BIOS with a more modern AMI or Quadtel BIOS.

In this video I talk about how to fix the issues with IBM's BIOS so you can run original IBM code (albeit patched) to maintain some of the machine's original purity.

--- Video Links

Download the patched BIOS and write up:
https://archive.org/details/ibm-5170-...

IBM PC AT 5170 Series:
Part 1:    • IBM PC/AT Model 5170: Saved from the trash 🔥  
Part 2:    • IBM PC/AT Model 5170: So many issues! (BIO...  
Part 3:    • Fixing and improving the IBM PC/AT 5170 BI...  

Virtual Box 6.1 running MS-DOS 6.22 and IBM MASM 2.0. Used this to compile the code and generate the BIN (without correct checksum)
https://www.virtualbox.org/

Managed disk images with WinImage 10.00
https://www.winimage.com/

Used HxD Hex Editor 2.4 to do binary file editing, and perform the 8-bit checksums correcting the last byte
https://mh-nexus.de/en/hxd/

Used RomWak to split/merge the binary files into odd/even version
https://github.com/freem/romwak

RomWak was complied on the PC using TCC 0.9.27
https://bellard.org/tcc/

To run a virtual 5170 I used Mame 0.207 (version is important)
https://www.mamedev.org/oldrel.html

Adrian's Digital Basement ][ (Second Channel)
   / @adriansdigitalbasement2  

Support the channel on Patreon:
  / adriansdigitalbasement  

-- Tools

Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.16...

O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J

Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW

Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0

Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digi...

Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy

TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000...

TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MI...

EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/

DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DS...

Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-...

Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-...

RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/

Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/1-2-5-10PCS-...

Heat Sinks:
https://www.aliexpress.com/item/32537...

Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI

--- Links

My GitHub repository:
https://github.com/misterblack1?tab=r...

Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
https://www.commodorecomputerclub.com/

--- Instructional videos

My video on damage-free chip removal:
   • How to remove chips without damaging the c...  

--- Music

Intro music and other tracks by:
Nathan Divino
@itsnathandivino