Olivetti M28 User Manual

Personal Com puter - Pocket Service G uide

M28

CHARACTERISTICS

Microprocessor 80286
Clock 8 MHz (4 MHz BUS)
RAM access t im e 150 ns
Wait st ates 1
Minimum/maximum RAM

capacity
ROM memory 32 KB

BOARDS

FUNCTION DESCRIPTION D.R.S. CODE CHARACTERISTICS

CPU System Board
CPU System Board
CPU System Board
CPU System Board
CPU System Board
Console Contr oller
Bus Adapter
Power supply
U-TURN board
RAM expansion
Monitor adapter
Monitor adapter
Monitor adapter
Monitor adapter
Monitor adapter
MDU adapter
HDU adapter
MFDU/HDU adapter

512 KB/1 MB

BA802
BA807
BA808/BA809
BA815
BA816
CO113
IF606
LA21
IF608
ME903
GO318
GO380
GO709
GO413
GO329
GO705/GO711
GO406
GO714

411082 C
411082 V

411949 V
964908 F
411081 B
411077 N

­411993 A

­411216 N
411080 N
411682 J
48193 H
411084 E
411083 D
411638 V

ROM BIOS 2.07
ROM BIOS 2.09
ROM BIOS 2.12
ROM BIOS 2.12

W = 230
Maximum 2 MB

M283270
E.G.C.

BIOS 2.07 requir ed

3

ROM BIOS/PAL/ EPROM LEVEL

FUNCTION POS. EVOLUTION

ROM
BIOSHL

Wait logic
Bus logic
RAM
select.
BIO select.
I/O logic
RAM de­code
PIEGY
BACK
KBC
uP8742
Keyb. FW

M28 3-1

6 K

PBUG/1.05

4 K

PBUF/1.05
PL02

5 D

PBUC

6 T

PBUB

7 P

PBUA

3 M

PBUD

1 F

PBUH

5 T

PL99

6 X

CSP9/2.01

8 V

CSPZ/1.0 CSSF/1.1

PBUL/1.08
PBUM/1.08

1.10

1.10

PBUS/2.07
PBUT/2.07

CSL7/203

PBUY/2.09
PBUX/2.09

PBU8/2.10
PBU9/2.10

PBU6/2.12
PBU7/2.12

COPROCES.

Personal Comp ut er - Pock et Se rv ice G uide

COMPATIBILITY NOTES

ROM BIOS 1. 05 - Solves lock problems when hard disk is form att ing def ec tive

tracks
ROM BIOS 1. 08 - System dist inguishe s bet ween 360 KB and 1.2 MB FDs
ROM BIO S 2.07

(BIT 168.605/05)

- 102-key keyboard management (ANK 2502)

- 720 KB micro floppy disk managemen t

- "COMBO" HD/MFD cont ro lle r boar d GO 714 ma n agem e nt

- "NOVEL" LAN management

ROM BIOS 209
(CD 168.601/518 )

- Solves Random lock problems when wor king wit h Starlan with
IRQ=2

- Eliminates interrupt 13 routine locks in the
Step Motor phase

ROM BIOS 2. 10 - Solves losses of set-u p problem s
ROM BIO S 2.12

(CDM 1 6 8.60. 1/525

- 1.44 MB micro floppy disk management

- OEC/PGC video control ler man agem e nt

SYSTEM BOARD COMPONENTS AND SETTINGS:
BA802 / BA807 / BA808 / BA815 / BA816

MC146818 8742

JU3

TIMER 8254- 2

EPROM
BOOTSTRAP
27128 PBUG

7P

6T

6X

5T

3M

JU2

JU4

FE2000

A
B

JU1

1F

UART 16450

JU5

JU6/JU7/JU8

8259
INTERRUPT
CONTROLLER

A: 82288-8

BUS CTRL

B: 82284-8

CLOCK

JUMPERS

JU4 and JU5
AREA 4 5 FUNCTION

Production IN* IN* Test both OUT

3-2 M28

BANK 0

BANK 1

EPROM
BOOTSTRAP
27128 PBUG

80286 CPU

BGT1A

Personal Com puter - Pocket Service G uide

JU1 1........ 8

16....... 9

AREA 1-16 2-15 3-14 FUNCTION

Parity check IN 512 KB on system bo ar d

OUT* 1 MB on system boar d

User Eprom IN * OUT* 2764/27128

OUT IN 27256

AREA 4-13 5-12 6-11 7-10 8-9 FUNCTION

BIOS Eprom IN* OUT* 27128

OUT IN 27256

Parallel port IN* Enabled

OUT Not enabled

Serial port IN* Not enabled

OUT Enabled

JU2 1........ 8

16....... 9

AREA 1-16 2-15 3-14 4-13 FUNCTION
Coprocess or

clock

IN OUT OUT IN 5.33 MHz
OUTININOUT8 MHz *

AREA 5-12 6-11 7-10 8-9 FUNCTION

Video adapter IN* OUT* Video adapter only

OUT IN Video adapter + EGC
IN IN External video adapter
OUT OUT

enable

3

JU3 1........ 4

8........ 5

AREA 1-8 2-7 3-6 4-5 FUNCTION

Production IN* Test
Video type IN* Colour

OUT Monochromatic

Production IN* -

JU6-JU7-JU8
AREA 6 7 8 FUNCTION

CPU Wait
state s

IN OUT OUT 4 Wait states
OUT IN OUT 5 Wait states
OUT OUT IN 6 Wait states

(*) Defa ult positi o n

M28 3-3

Personal Comp ut er - Pock et Se rv ice G uide

I/O ADDRESS MAP

ADDRESS FUNCTION ADDRESS FUNCTION

000-01F
020-03F
040-05F
060-06F
070-07F
080-09F
0A0-0BF
0F0-0FF
1F0-1F8
200-207
278-27F

DMA cont ro ller 1
Interrupt controller 1
Timer
Keyboard controller
RTC, CMOS, NM I mas k
DMA page regist er
Interrupt controller 2
80287
Hard disk controller
Reserved
Parallel port 2

2F8-2FF
300-31F
360-36F
378-37F
380-38F
3A0-3AF
3B0-3BF
3C0-3CF
3D0-3DF
3F0-3F7
3F8-3FF

Serial port 2
Reserved
Reserved
Parallel port 1
COM2 SDLC
SDLC 1
Reserved
Reserved
Video controller
Floppy disk controller
Available

INTERRUPT LEVELS

LEVEL FUNCTION

IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15

Channel 0 tim er
Keyboard controller
Interrupt f ro m inter r upt controller 2
Serial port 2
Serial port 1
Parallel port 2
Floppy disk cont r ol ler
Parallel port 1
Date and Time
Redirect ed to IRQ 2
Available
Available
Available
80287
Hard disk controller
Available

DMA CHANNELS

CHANNEL FUNCTION

DMA0
DMA1
DMA2
DMA3
DMA4
DMA5
DMA6
DMA7

8 BIT
8 BIT
8 BIT
8 BIT
16 BIT
16 BIT
16 BIT
16 BIT

3-4 M28

SW2

Personal Com puter - Pocket Service G uide

SETTING S FOR MEM ORY EXPANSI O N BOARD ME 9 03 (M EM2852 )

SW1

3

BANK 3 BANK 2

BANK 1 BANK 0

FOR M28

SW1 GROUP
AREA 1234FUNCTION

Parity check ON YES

OFF NO

RAM Capacity
on-board
ME-903

SW2 GROUP
AREA 12345678FUNCTION

System board
512 K

System board
1 MB

ON ON ON OFF ON ON ON OFF 1st board on bus
ON ON ON OFF OFF ON ON OFF 2nd board on bus
ON ON ON OFF ON OFF ON OFF 3rd board on bus
OFF OFF ON OFF ON ON ON OFF 1st board on bus
OFF OFF ON OFF OFF ON ON OFF 2nd board on bus
OFF OFF ON OFF ON OFF ON OFF 3rd board on bus

OFF OFF 512 KB
ON OFF 1 MB
OFF ON 1.5 MB
ON ON 2 MB

BPA5A

M28 3-5

Personal Comp ut er - Pock et Se rv ice G uide

FOR M250

SW1 GROUP: Configures e xpan sion board capacity, set it as M28.

SW2 GROUP:

FOR M250 WITH 1 MB ON SYSTEM BOA R D

SW2 GROUP

No. MEM 285212345678

1 ON ON ON OFF ON ON ON OFF
2 ONONONOFFOFFONONOFF
3 ONONONOFFONOFFONOFF

FOR M250 WITH 2 MB ON SYSTEM BOA R D

SW2 GROUP

No. MEM 285212345678

1 ON OFF ON ON OFF ON ON OFF
2 ON OFF ON ON ON OFF ON OFF
3 ON OFF ON ON OFF OFF ON OFF

NOTE: If the MEM 2852 bo ar d is installed in a system with 1 MB on t he sys tem boar d, 256 KB ar e
lost from total system memory.

3-6 M28

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