IBM XT/286 5162
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Intel above Board Plus with 2,048 MB expansion memory, used as EMS and XMS

Bank 0             : 512K: TMS4256-15NL, TEXAS INSTRUMENTS 
Bank 1             : 512K: TMS4256-15NL, TEXAS INSTRUMENTS
Bank 2             : 512K: KM41256AP-15, SAMSUNG
Bank 3             : 512K: M5M4256P-15, MITSUBISHI

MAINBOARD:
Conventional memory:    -512K: 2x MITSUBISHI: MH25609J-10, 9x M5M4256AJ-10
                     512-640K: 2x NEC D41256C-10, 4x NEC D41464C-10
                     
I changed the clock crystal from 12 to 16 MHz and the 80286 from 6 to 8 MHz!
TMC IFSP V1.20 with HDC/IDE, FDC (2x2 drives), LPTx, COMx

tbr, 24.01.2021
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Expansion Slots
.... I/O Card ......................... IRQ ...... I/O ............ DMA ..
8 .8 .................................. .......... ................ ......
7 .8 DELOCK converter IDE 40 to CF .... .......... ................ ......
6 16 FDC/HDC I/O ...................... 4,6,7,14 . 3F8,3F0,378,1F0. ......
5 16 .................................. .......... ................ ......
4 16 .................................. .......... ................ ......
3 16 .................................. .......... ................ ......
2 16 Intel Above Board Plus ........... .......... ................ ......
1 .8 MDA .............................. 7 ........ 378............. ......

Interrupt IRQ
.... I/0 ...... ...............
0 .. 040-05F... System Timer ..
1 .. 060&064... Keyboard ......
2 .. 0A0-0BF... Cascade .......
8 .. 070-07F... RTC ...........
9 .. 340-35F... ...............
10 . .......... ...............
11 . 334-337... ...............
12 . .......... ...............
13 . 0F0-0FF... FPU ...........
14 . 1F0-1F7... HDC ...........
15 . 170-177 .. ...............
3 .. 2F8-2FF .. COM2 ..........
4 .. 3F8-3FF .. COM1 ..........
5 .. 220-233... ...............
6 .. 3F0-3F7 .. FDC ...........
7 .. 378-37F .. LPT1 ..........

Direct Memory Access DMA
0 .. free
1 .. free
2 .. FDC
3 .. free
4 .. Cascade
5 .. free
6 .. free
7 .. free
                                                   
Upper Memory Area (UMA): 384K (3 x 128K)
. = empty memory address (1K)

M = IBM Monochrom Display Adapter (4K only!)
X = XT-IDE ROM BIOS (8K, DE000-DFFFF)

E = EMS (1-4) frame pages (4 x 16K = 64K); EMM.SYS
1 = QRAM High RAM, Region 1 (64K): EMS memory is used for this.

u = unavailable (planned for future ROM expansion: URP, 2nd, p.33)
b = ROM BASIC
R = Motherboard ROM BIOS
b+R = U34+U35 (64K, F0000-FFFFF)
h = HMA, High Memory Area

1st block (128K): Video RAM Memory (VGA, EGA, MDA, HGC or CGA)
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0A0000: ................................................................
0B0000: MMMM............................................................

2nd block (128K): Special Purpose RAM Memory and Adapter ROM
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0C0000: 1EEEEEEEEEEEEEEE2EEEEEEEEEEEEEEE3EEEEEEEEEEEEEEE4EEEEEEEEEEEEEEE
0D0000: 1111111111111111111111111111111111111111111111111111111111111111

3rd block (128K): Motherboard BIOS Memory
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0E0000: uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR

Extended Memory (64K): HMA
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
100000: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Extended Memory (XMS): up to 16 MB (in the current case only 448K)
110000: ................................................................
......: ................................................................
FFFFFF: ................................................................