I have one 32 and two 16 bit models. The idea is fascinating. 
@71D4.ADF - Kingston DataCard 32 (both adapters use the same adf) 
C71D4.ADF - Init file for _71D4.ADF 
DC16.EXE 16-bit Data Card .ADF files, install files 
data16c3.pdf  KTM-DC16 installation guide 
DC32.EXE 32-bit Data Card .ADF files, install file. 
data32c3.pdf  KTM-DC32 installation guide 
DCWIPE.EXE Wipes Track 0 on Data Card only! 

Use in 90 or 95 Systems
   This adapter seems to be a Stage 3 microchannel card AT BEST! The adf is austere. There is NO inkling of streaming or SCB or ANY advanced functions. So while it may work, the question is "What for?". 

Hard Drive
   The DC16 and DC32 use 2.5" Laptop drives with a 50 pin header (missing 3 pins). The upper 4 pins on the drive (towards the top of the adapter) are seperated from the rest of the pins (the usual 44 pin IDE header). These 4 pins provide the power (assuming +5, +12, Gnd...) 

W1
  This was to be a six pin header. If you follow the traces on the reverse of the DataCard, they go up to the four power pins at the top of J1. My guess- W1 was to be a seperate power header. Why? All the DCs I have use 50 pin cables. 

Jumper W2
   Jumper W2 in the upper left corner of the DC-16/32 is set to position A for compatibility with all IBM SIMM modules. To use 16MB SIMMs on the DC32, move the jumper to position B for 16MB SIMM compatibility. 
   For Kingston 2MB, 4MB, and 8MB SIMMs, either jumper position works fine. IBM and Kingston SIMM modules can be mixed. 
(Ed. There seems to be different versions of the DC32, some MAY have W2. Mine does not.) 

KTM-DC16  16-bit Data Card 
 The DC-16 is designed for Models 50, 50z, 55SX, 56, 57, 60, and 65SX personal computers. The models are KTM-DC16/127, DC16/ 209, DC16/260 and DC16/340. The  2.5" 16ms hard drive sizes are 127MB, 209MB, 260MB or 340MB (Ed. an 85MB exists) 
   The DC-16 is also a 16-bit memory expansion adapter which supports up to 16 MB of onboard memory. The DataCard-16 can be plugged into any 16-bit expansion slot, but should use the slot closest to the fixed disk controller so as not to interfere with any other expansion slot. 
   Its onboard hard drive can replace the existing hard disk or be configured as a second hard drive for increased data storage capacity. The DC-16 can also be configured as the boot drive and may be partitioned into several logical drives to run more than one operating system. The DC-16 supports DOS 3.3 or higher, OS/2 2.0 or higher, and Windows NT 3.x. 

DataCard-16 SIMM Modules
   The DC-16 has four sockets labeled P1, P2, P3, and P4 into which you can plug from one to four SIMM modules. The DC-16 uses standard 2MB and 4MB IBM 72-pin SIMM modules. 
Note: Do NOT use 1MB SIMMs (Kingston P/N: KTM1000/M70). other 1MB SIMMs; or ones slower than 85nS. These modules are incompatible with the DataCard-16. 

201 Memory Parity Error and 164 Memory Size Error
If you are installing the DataCard-16 with memory, it is important to run the INSTALL program from the Kingston diskette to copy the DataCard's option files to your backup Reference diskette. 

Systems Using REPLY ™ Motherboards
   If your PS/2 computer has been upgraded with a REPLY system board, it will not recognize memory on the DataCard-16. The REPLY board is designed to address a full 16MB of RAM from its system board without searching micro channel expansion ports for additional memory. For this reason, memory should be installed directly onto the system board. Remove any memory from the DataCard-16 and install it on the REPLY motherboard. 

KTM-DC32  32-bit Data Card 
The DataCard-32 is designed for IBM PS/2 Models 70 and 80 personal computers. The models are KTM-DC32/127, DC32/ 209, DC32/260 and DC32/340. The  2.5" 16ms hard drive sizes are 127MB, 209MB, 260MB or 340MB 
   The DC-32 is also a 32-bit memory expansion adapter which supports up to 64 MB of onboard memory. The DC-32 can be plugged into any 32-bit expansion slot, but should use the slot closest to the fixed disk controller so as not to interfere with any other expansion slot. 
   Its onboard hard drive can replace the existing hard disk or be configured as a second hard drive for increased data storage capacity. The DC-32 can also be configured as the boot drive and may be partitioned into several logical drives to run more than one operating system. The DataCard-32 supports DOS 3.3 or higher, OS/2 2.0 or higher, and Windows NT 3.x. 

DataCard-32 SIMM Modules
   The DataCard-32 has four sockets labeled P1, P2, P3, and P4 into which you can plug from one to four SIMM modules. The DataCard-32 uses IBM standard 72-pin SIMMs of 2MB, 4MB, 8MB, and 16MB SIMM sizes with parity or without parity. It does not support: 
Note: Do NOT use 1MB SIMMs (Kingston P/N: KTM1000/M70) other 1MB memory modules; or memory modules that are slower than 85 nanoseconds. These modules are incompatible with the DataCard-32. 

Selectable Boot feature: (Not a ADF section! Just a combination key press.)
   This feature allows you to select which hard drive to boot from while the system is powering on by pressing Ctrl+Alt+F1 just after the Kingston logo appears (Press the keys after the Kingston logo appears or you may encounter a 301 keyboard error). As the system is booting up, you will see the following message: 
       Kingston Technology Corp. Copyright (c) 1993.
       BIOS Version xxx

   At this point quickly press Ctrl+Alt+F1. You have only a few seconds to do so. In the following example, the internal hard drive is the boot drive and you wish to boot from the DataCard-32. The screen will now display: 
     First drive is original.
     Press B to swap, or ENTER to bypass timer.

   Pressing "B" on the keyboard will change the boot disk from the internal hard drive to the DataCard-32. If you change your mind, press [Enter] to bypass, or let the timer count down to zero and it will boot from the default disk. This procedure will not permanently change the boot drive default. 

NOTE: Both adfs look to be identical. 

Change Configuration
   If you have an internal IBM hard disk already installed and are adding the DataCard-32 as a second drive, it is important to know the drive type number. Page down the Change Configuration menu to the last expansion slot. It should look something like this: 
slot x - IBM Hard Disk Adapter
   Type of first drive..........[ 32]
   Type of second drive.....[ 0]

In this example, the IBM internal hard drive type is 32. Write down your drive type number below for future reference 

   For older systems, the 90/95 series would not show Drive Type. Or would it? I don't know. 

Controller I/O Address
   This selects the I/O address space of the adapter 
   < I/O Base 8020- 803f>,  8120 - 813f,  8220-823f,  8320- 833f 

BIOS Address
   This selects the base address of the BIOS PROM. The default setting is D4000h for DOS or OS/2 non-bootable, but can be changed to another address if desired. For Windows NT, use D0000h bootable or D2000h non-bootable. If you have another hard drive currently on your system, it will remain the boot drive at any non-boot address setting and the DataCard will be the second physical drive on your system. If the DataCard is the only hard drive on your system, it will become the boot drive and boot the system from any address listed. 
   <D4000-Dos-OS/2 non-boot>, D600-Dos-OS/2 boot, C800-Dos-OS/2 boot, CA00-Dos-OS/2 non-boot, CC00-Dos-OS/2 non-boot, CE00-Dos-OS/2 non-boot, D000-Dos-NT boot, D200-Dos-NT  non-boot 

Interrupt Level
   This selects the interrupt level for the adapter 
   <Interrupt 15>,  14, 11, 10