IBM PC 5150 (16-64) 
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With Super PC BIOS V3.1 and Lo-tech 1MB Memory Board using USE!UMBS.SYS

            Mainboard    Lo-tech 1MB
DOS memory: 4x16=64  (+) 10x64=640   = 704K (000000-0AFFFF)

ISA Floppy Disk Controller BIOS : OFF ON OFF OFF OFF (0xEE000 0xEFFFF, 8K) 

tbr, 21.01.2021
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        Conventional Memory: 640K (10 x 64K)
-page-: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
000000: bank 0-3 (4 x 16KB) ------------------------------------------->  064
010000: Lo-tech 1MB (1.2 ON) ------------------------------------------>  128
020000: Lo-tech 1MB (1.3 ON) ------------------------------------------>  192
030000: Lo-tech 1MB (1.4 ON) ------------------------------------------>  256
040000: Lo-tech 1MB (1.5 ON) ------------------------------------------>  320
050000: Lo-tech 1MB (1.6 ON) ------------------------------------------>  384
060000: Lo-tech 1MB (1.7 ON) ------------------------------------------>  448
070000: Lo-tech 1MB (1.8 ON) ------------------------------------------>  512
080000: Lo-tech 1MB (2.1 ON) ------------------------------------------>  576
090000: Lo-tech 1MB (2.2 ON) ------------------------------------------>  640
        
        Upper Memory Area (UMA): 384K (3 x 128K)
        1st block: Video RAM Memory
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0A0000: Lo-tech 1MB (2.3 ON) --- used as conventional memory ---------->  704
0B0000: MMMM............................................................  768
        
        2nd block: Special Purpose RAM Memory and Adapter ROM
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0C0000: Lo-tech 1MB (2.5 ON) --- can be used by USE!UMBS -------------->  832
0D0000: Lo-tech 1MB (2.6 ON) --- can be used by USE!UMBS -------------->  896
        
        3rd block: Adapter ROM, ROM Basic and Motherboard ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0E0000: ........................................................FFFFFFFF  960
0F0000: ................rrrrrrrrbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbSSSSSSSS 1024 
------: ................|<-U28->|<-U29->|<-U30->|<-U31->|<-U32->|<-U33->

        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
110000: ................................................................ 
......: ................................................................ 
FFFFFF: ................................................................ 

b = Cassette ROM BASIC (4 x 8K, ROM, U29 to U32)
M = Monochrom Display Adapter (4K, ROM, on MDA)
r = optional Motherboard ROM BIOS (8K, U28; not used, empty chip)
S = Super PC BIOS V3.1 (8K, ROM, U33)
F = ISA Floppy Disk Controller BIOS (8K, ROM)

1 bank = 1 page = 64K
1 block = 2 banks = 128K
. = 1K (unused) -> this memory does NOT exist physically as RAM/ROM