Epson ActionDesk 4000 Panduan Informasi Produk - Halaman 7
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Halaman Cetak
System Memory Map
000FFFFFFh
System BIOS ROM: 84KB
Duplicated from OFOOOOh
000FF0000h
Resewed for system board: 84KB
Duplicated from OEOOOOh
OOOFEOOOOh
Extended memory
001OOO0Oh
System BIOS ROM: 84KB
Default Shadow RAM duplicated at FFOOOOh
OOOFOOOOh
Unused or l/O expansion ROM: 160KB
Reserved for ROM on l/O adapters
OOOC8O0Oh
VGA BIOS ROM: 32KB
Default Shadow RAM
OOOCO0OOh
000B8000h
Unused or VGA text
(monochrome): 32KB
OOOBOOOOh
Video memory: 64KB
Reserved for graphics display buffer
OOOAOOOOh
Conventional system memory: 640KB
00000000h
System l/O Address Map
address
Hex
000-01F
020 - 03F
lnterrupt controller 1,8259, master
022 - 024
Chip set configuration register
040 - 05F
Timer, 8254
080-08F
Keyboard controller, 8042
070 - 07F (CMOS)
Real-time clock NMI (non-maskable Interrupt) mask
080 - 09F
DMA page register, 74LS612
OAO-0BF
084, 0BB
0BC
OCO - ODF
DMA controller 2,8237
OF0
Clear math coprocessor busy
OF1
Reset math coprocessor
0F8 - 0FF
Math coprocessor
VGA text
(color): 32KB
64MB
(Maximum
system
memory)
1MB
640KB
Information Reference List
Engineering Change Notices
None.
Technical Information Bulletins
None.
Product Support Bulletins
None.
Related Documentation
TM-ACTD4
PL-ACTD4
4002497
9/15/93
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