M24/M24SP Motherboard Settings and Configuration

OLIVETTI

M24/M24SP

Processor
8086
Processor Speed
8/10MHz
Chip Set
Unidentified
Max. Onboard DRAM
640KB
Cache
None
BIOS
Unidentified
Dimensions
355mm x 304mm
I/O Options
Floppy drive interface, parallel port, serial ports (2)
NPU Options
8087

CONNECTIONS
Purpose
Location
Purpose
Location
Floppy drive interface
CN1
Parallel port
J4
Serial port 1
J3
Serial port 2
J5

USER CONFIGURABLE SETTINGS
Function
Switch
Position
»
256KB memory chip not used
DIPSW0/5
On

256KB memory chip used
DIPSW0/5
Off
»
NPU disabled
DIPSW0/6
On

NPU enabled
DIPSW0/6
Off
»
UART type select 8250
DIPSW0/7
On

UART type select 8530
DIPSW0/7
Off
»
BIOS type select 2732 (M24 only)
DIPSW0/8
On

BIOS type select 2764 (M24 only)
DIPSW0/8
Off
»
No memory installed in Bank 0 (M24SP only)
DIPSW0/8
On

Memory installed in Bank 0 (M24SP only)
DIPSW0/8
Off
»
Floppy drive tracks per inch select 48 (320KB drive)
DIPSW1/1
On

Floppy drive tracks per inch select 96 (640KB drive)
DIPSW1/1
Off
»
Floppy drive start up speed select slow
DIPSW1/2
On

Floppy drive start up speed select fast
DIPSW1/2
Off
»
HDU ROM code select on mainboard
DIPSW1/3
On

HDU ROM code select on controller
DIPSW1/3
Off
»
Display controller select standard
DIPSW1/4
On

Display controller select non standard
DIPSW1/4
Off

DRAM CONFIGURATION
Size
Bank 0
Bank 1
128KB
(18) 44256
NONE
256KB
(18) 44256
(18) 44256
512KB
(18) 44100
NONE
640KB (M24SP only)
(18) 44100
(18) 44256
640KB
(18) 44256
(18) 44100

DRAM SWITCH CONFIGURATION
Size
DIPSW0/1
DIPSW0/2
DIPSW0/3
DIPSW0/4
128KB
Off
On
On
On
256KB
On
Off
On
On
384KB
Off
Off
On
On
512KB (mainboard only)
On
On
On
Off
512KB (mainboard and expansion card)
On
On
Off
On
640KB
Off
On
Off
On
640KB (mainboard only)
Off
On
On
Off

VIDEO CONFIGURATION
Type
DIPSW1/5
DIPSW1/6
IBM B/W display
Off
Off
40 x 25
Off
On
80 x 25
On
Off

FLOPPY DRIVE CONFIGURATION
Drives installed
DIPSW1/7
DIPSW1/8
1
On
On
2
Off
On

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M24/M24SP Motherboard Settings and Configuration

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Processor	8086
Processor Speed	8/10MHz
Chip Set	Unidentified
Max. Onboard DRAM	640KB
Cache	None
BIOS	Unidentified
Dimensions	355mm x 304mm
I/O Options	Floppy drive interface, parallel port, serial ports (2)
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Floppy drive interface	CN1	Parallel port	J4
Serial port 1	J3	Serial port 2	J5

USER CONFIGURABLE SETTINGS
Function		Switch	Position
»	256KB memory chip not used	DIPSW0/5	On
	256KB memory chip used	DIPSW0/5	Off
»	NPU disabled	DIPSW0/6	On
	NPU enabled	DIPSW0/6	Off
»	UART type select 8250	DIPSW0/7	On
	UART type select 8530	DIPSW0/7	Off
»	BIOS type select 2732 (M24 only)	DIPSW0/8	On
	BIOS type select 2764 (M24 only)	DIPSW0/8	Off
»	No memory installed in Bank 0 (M24SP only)	DIPSW0/8	On
	Memory installed in Bank 0 (M24SP only)	DIPSW0/8	Off
»	Floppy drive tracks per inch select 48 (320KB drive)	DIPSW1/1	On
	Floppy drive tracks per inch select 96 (640KB drive)	DIPSW1/1	Off
»	Floppy drive start up speed select slow	DIPSW1/2	On
	Floppy drive start up speed select fast	DIPSW1/2	Off
»	HDU ROM code select on mainboard	DIPSW1/3	On
	HDU ROM code select on controller	DIPSW1/3	Off
»	Display controller select standard	DIPSW1/4	On
	Display controller select non standard	DIPSW1/4	Off

DRAM CONFIGURATION
Size	Bank 0	Bank 1
128KB	(18) 44256	NONE
256KB	(18) 44256	(18) 44256
512KB	(18) 44100	NONE
640KB (M24SP only)	(18) 44100	(18) 44256
640KB	(18) 44256	(18) 44100

DRAM SWITCH CONFIGURATION
Size	DIPSW0/1	DIPSW0/2	DIPSW0/3	DIPSW0/4
128KB	Off	On	On	On
256KB	On	Off	On	On
384KB	Off	Off	On	On
512KB (mainboard only)	On	On	On	Off
512KB (mainboard and expansion card)	On	On	Off	On
640KB	Off	On	Off	On
640KB (mainboard only)	Off	On	On	Off

VIDEO CONFIGURATION
Type	DIPSW1/5	DIPSW1/6
IBM B/W display	Off	Off
40 x 25	Off	On
80 x 25	On	Off

FLOPPY DRIVE CONFIGURATION
Drives installed	DIPSW1/7	DIPSW1/8
1	On	On
2	Off	On