Page 2 of 3
AR-B1578 Manual
(B) COM-B RS-485 Adapter Select
(JP1)
Reserved for Acrosser's
RS-485 Adapter Used Only
1
2
3
RS-232C
1
2
3
Factory-Default Setting
(C) COM-B RS-232C/RS-485 Select
(SW1-8)
ON
1
2
3
4
5
6
OFF
SW1-8 -- RS-232 (Factory Default Setting)
7
8
ON
1
2
3
4
5
6
OFF
SW1-8 -- RS-485
7
8
(2) RS-485 Terminator Select (JP2)
OFF
Factory Preset
1
2
1
2
ON
(3) RS-485 Connector (J4)
1 N485+
2 N485-
3 GND
J4 (COM B)
(4) RS-232 Connector (CN3 & DB2)
SW1-7
Address
Note
OFF
D400 : 0000 Factory Preset
ON
D000 : 0000
1.9. USB CONNECTOR (CN4)
6 DATA+
8 GND
CASE GND 9
10 CASE GND
2 VCC
DATA- 3
4 DATA-
DATA+ 5
CN4
VCC 1
GND 7
1
2
9
7
5
3
10 8
6
4
1.10. EXTERNAL SPEAKER
HEADER (J1)
1
2 Speaker-
3 Speaker-
4 Speaker-
1.11. RESET HEADER (J7)
1 Reset+
1
2
2 Reset-
1.12. LED HEADER
(1) External Power LED (J5)
1
2
3
1 Power LED+
2 Not Used
3 Power LED-
(2) HDD LED Header for IDE0 (J2)
1
2
LED+
LED-
(3) HDD LED Header for IDE1 (J3)
1
2
LED-
LED+
(4) Watchdog LED Header (J11)
1 LED+
2 LED-
1
2
1.13. POWER CONNECTOR
(J9)
1 GND
2 +5 VDC
3 +5 VDC
4 GND
5 GND
6 +12 VDC
7 -12 VDC
8 -5 VDC
1.14. CRT CONNECTOR (DB1)
DB1 (CRT Connector)
6
10
15
11
1
2
3
4
5
1 Red
2 Green
3 Blue
13 Horizontial Sync
14 Vertical Sync
4, 9, & 11 Not used
5 & 10 Ground
6, 7 & 8 AGND
12 DDC DATA
15 DDC CLOCK
1.15. DRAM CONFIGURATION
SIMM2
SIMM1
Total Memory
256KX32(X36) 256KX32(X36)
2MB
512KX32(X36) 512KX32(X36)
4MB
1MX32(X36)
1MX32(X36)
8MB
2MX32(X36)
2MX32(X36)
16MB
4MX32(X36)
4MX32(X36)
32MB
8MX32(X36)
8MX32(X36)
64MB
16MX32(X36) 16MX32(X36)
128MB
1.16. D.O.C. MEMORY
ADDRESS SELECT
(SW1-7)
Step 1:
Use SW1 to select the correct
D.O.C. memory address.
Step 2:
Insert programmed DiskOnChip
into sockets U10 setting as DOC.
Step 3:
Line up and insert the AR-B1578
card into any free slot of your
computer.
ON
1
2
3
4
5
6
OFF
SW1-7 -- D.O.C. Memory Address
(Factory Default Setting)
7
8
DOC
SW1-7
Address
Note
OFF
D400 : 0000 Factory Preset
ON
D000 : 0000
1.17. CPU SETTING
A. System Base Clock & CPU Clock
Multiplier (SW1)
ON
1
2
3
4
5
6
OFF
Clock
Multiplier
SW1 -- Factory Default Setting
7
8
DOC
RS-485
(1) CPU Base Clock Select (SW1)
SW1-4 SW1-5 SW1-6 Base Clock PCI Clock
ON
ON
OFF
50MHz
25MHz
OFF
ON
OFF
66.6MHz
33.3MHz
ON
OFF
OFF
60MHz
30MHz
OFF
OFF
OFF
55MHz
27.5MHz
OFF
OFF
ON
75MHz
37.5MHz
ON
1
2
3
4
5
6
OFF
Clock
Multiplier
7
8
DOC
RS-485
(2) CPU Clock Multiplier Select (SW1)
ON
1
2
3
4
5
6
OFF
Multiplier
SW1
7
8
BF0
BF1
BF2
B. CPU Logic Core Voltage Select (SW2)
ON
1
2
3
4
OFF
SW2 -- Factory Default Setting
The following table lists the setup of CPU
voltages from 1.96V to 3.46V.
SW2-1 SW2-2 SW2-3 SW2-4 SW2-5 SW2-6 Voltage
OFF
OFF
OFF
OFF
OFF
--
1.96V
ON
OFF
OFF
OFF
OFF
--
2.06V
OFF
ON
OFF
OFF
OFF
--
2.16V
ON
ON
OFF
OFF
OFF
--
2.2 V
ON
ON
OFF
OFF
OFF
--
2.26V
OFF
OFF
ON
OFF
OFF
--
2.36V
ON
OFF
ON
OFF
OFF
--
2.4 V
ON
OFF
ON
OFF
OFF
--
2.46V
OFF
ON
ON
OFF
OFF
--
2.56V
ON
ON
ON
OFF
OFF
--
2.66V
OFF
OFF
OFF
ON
OFF
--
2.76V
ON
OFF
OFF
ON
OFF
--
2.86V
OFF
ON
OFF
ON
OFF
--
2.96V
ON
ON
OFF
ON
OFF
--
3.06V
OFF
OFF
ON
ON
OFF
--
3.16V
ON
OFF
ON
ON
OFF
--
3.26V
OFF
ON
ON
ON
OFF
--
3.36V
ON
ON
ON
ON
OFF
--
3.46V
C. CPU Cooling Fan Power Connector
(J10)
1 +12V
2 GND
1
2
D. P54C/P55C CPU Type Select (JP6)
Intel Pentium
AMD K5
Cyrix 6x86
IDT Winchip C6
1
2
3
4 6
5
Intel Pentium MMX
AMD K6
Cyrix 6x86L
Cyrix 6x86MX
(Factory Preset)
1
2
3
4
6
5
