SurePOS 500 4846-XX5 Technical Reference
Page 27 of 63
768-831 KB C0000-CFFFF 64 KB Video BIOS ROM (shadowed)
832-835 KB D0000-D0FFF 4 K Network ROM boot loader
836-895 KB D0FFF-EFFFF 124 KB Free for EMM386
896 – 959KB E0000-EFFFF 64KB Free for EMM386
960 KB - 1MB F0000-FFFFF 64 KB System ROM BIOS
1- 16 MB 100000-FFFFFF 15 MB PCI/ISA Space
16 MB – 4095.5
GB
1000000-FFF7FFFF 4079.5 MB OS, PCI adapter memory decode, etc.
4095.5 MB -
4096 MB
FFF80000-FFFFFFF 512 KB System ROM BIOS (ISA Bus)
3.9 COM Port Setup
Physical
UART
Tailgate
Port
Name
Function
Connector
Type
Location Notes
Default
I/O and
IRQ
UART1 COM1
Available to
user
RJ45
Rear
Tailgate
BDA COM1 3F8/4
UART2 COM2
Available to
user
RJ45
Rear
Tailgate
BDA COM2 2F8/3
UART3 COM3
Available to
user
RJ45
Rear
Tailgate
COM6 2E0/11
Distributed
VFD
connection
DB15 F
Rear
Tailgate
Integrated
VFD
connection
Custom Tower Top
BDA COM4
Only one of integrated or
distributed VFD may be
enabled at the same time.
CMOS Setup allows
selection.
UART4 Dist-VFD
8051 1 Internal Internal
Communications with 8051
for EEPROM, cash drawer,
and LCD control.
2E8/6
UART5 n/a
MSR
connection
RJ45 Tablet Side BDA COM3 3E8/5
UART6 n/a Touch Internal Internal
COM5
Resources hardcoded to
2F0h/IRQ 7
2D8/7
3.10 Video Modes
Supported VGA Video Display Modes
Video
Mode
Pixel
Resolution
Color
Depth
(bpp)
Mode
Type
Display
Adapter
Font
Size
Character
Resolution
Dot
Cloc
k
(MHz
)
Horiz.
Freq.
(KHz)
Vert
Freq(Hz)
Video
Memory
(KBytes)
1
Information for communicating with the 8051 can be found in the Bryce I/O Subsystem Microcontroller Firmware
Specification.
