ACS-1000 Motherboard Settings and Configuration

Processor	8088
Processor Speed	4.77/8MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	1MB
Maximum Video Memory	None
Cache	None
BIOS	Unidentified
Dimensions	305mm x 216mm
I/O Options	Floppy drive interfaces (2), SASI connector, parallel port, serial ports (2), serial bus connector
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	E2	Serial port	P7
Speaker	P2	Parallel port	P8
Floppy drive interface	P3	Reset switch	P9
Floppy drive interface	P4	SASI interface	P10
Serial bus connector	P5	External battery	P11
Serial port	P6

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Normal reset operation enabled	E2	Open
	Reset controlled by power supply signal	E2	Closed
»	POST normal operation	S1/1	Off
	POST special test	S1/1	On
»	NPU not installed	S1/2	On
	NPU installed	S1/2	Off
»	BIOS type select 8K/16K	S1/10	Off
	BIOS type select 32K	S1/10	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
64KB	64K	None	None	None
128KB	64K	64K	None	None
192KB	64K	64K	64K	None
256KB (A)	64K	64K	64K	64K
256KB (B)	256K	None	None	None
512KB	256K	256K	None	None
640KB	256K	256K	64K	64K
1MB	256K	256K	256K	256K
Note: The size of the chips are unidentified.

DRAM SWITCH CONFIGURATION
Size	S1/3	S1/4	S1/9
64KB	On	On	Off
128KB	Off	On	Off
192KB	On	Off	Off
256KB (A)	Off	Off	Off
256KB (B)	On	On	On
512KB	Off	On	On
640KB	Off	Off	On
1MB	On	Off	On

CPU SPEED SELECTION
Speed	E1
Keyboard selectable	Pins 1 & 2 closed
4.77MHz	Pins 2 & 3 closed
8MHz	Pins 3 & 4 closed

PARALLEL PORT ADDRESS SELECTION
Setting		E3
»	LPT2 if another device is set as LPT1. It is set as LPT1 if no other device is installed.	Pins 1 & 2 closed
	LPT1 at all times	Pins 3 & 4 closed

SERIAL PORT ADDRESS SELECTION (P6)
Setting		E4
»	COM1	Pins 1 & 2 closed
	COM2	Pins 3 & 4 closed
	COM3	Pins 5 & 6 closed
	COM4	Pins 7 & 8 closed

SERIAL PORT INTERRUPT SELECTION (P6)
IRQ		E6
	IRQ2	Pins 5 & 6 closed
	IRQ3	Pins 3 & 4 closed
»	IRQ4	Pins 1 & 2 closed

SERIAL PORT ADDRESS SELECTION (P7)
Setting		E5
	COM1	Pins 1 & 2 closed
»	COM2	Pins 3 & 4 closed
	COM3	Pins 5 & 6 closed
	COM4	Pins 7 & 8 closed

SERIAL PORT INTERRUPT SELECTION (P7)
IRQ		E7
	IRQ2	Pins 5 & 6 closed
»	IRQ3	Pins 3 & 4 closed
	IRQ4	Pins 1 & 2 closed

MONITOR SELECTION
Setting		S1/5	S1/6
	None installed	On	On
»	80 x 25 color	On	Off
	40 x 25 color	Off	On
	Monochrome	Off	Off

FLOPPY DRIVE SELECTION
Drives installed		S1/7	S1/8
	1	On	On
»	2	Off	On
	3	On	Off
	4	Off	Off