Page 1
CHARACTERISTICS
Personal Com puter - Pocket Ser vice G uide
P750
Microproc esso r Intel 486
Clock 25 MHz
Architecture MICROCHANNEL
Memory System board can suppo rt 8 MB
installed on 2 banks:
Two configur ations ar e po ssible:
- 2 MB on system boar d
(8 SIMM 256 Kb x 9). Expandable
only by replacing these SIMM s with
those of 1 Mb x 9 EXM 26-807
- 4 MB on system boar d
(4 SIMM 1 Mb x 9). Expandable
by installing 4 more SIMM s
1 Mb x 9 EXM 26- 807
System mem or y can be furt her ly
expanded via a 4 MB mem or y
expansion boar d MEM 26- 80 6. This
board can be expan ded t o 8 MB via
4 SIMM 1 M b x 9 EXM 26-807.
Memory access 80 ns
Coprocess or Weitek WTL 416 7
Floppy Disk 1.44 MB 3.5" Panasonic J-257
1.44 MB 3.5" Sony MP-F1 7
1.44 MB Mitsubishi MF355C
Hard Disk 100 MB CONNER 30109 MCA 3.5 "
120 MB CONNER 30109 MCA 3.5 "
200 MB CONNER 3209 MCA 3.5"
Streaming Ta pe 80, 120 MB IRVIN 285
Expansion slots Five available, one 16 -b it; one 16-bit
with video board extens io n; three
32-bit.
Video adapter Integrated on System Board
Super VGA 82C452
Floppy Disk controller Integrated on Syst em Boar d
Floppy Disk controller: WD57C65
Hard Disk controller Uses intelligent hard disk drives that
do not need cont roller s be caus e BU S
is directly inte rfac ed via ada pt er board
for MIS49 signals
Mouse PS/2- and AT-co mpat ible G RD 25- 025
Keyboard 101/102-key ANK27-101
ANK27-102
SYSTEM BOARD
BA84 9 - P1 .5 - 4 MB
BA85 8 - P1 .5 - 2 MB
BA880 - P2.1 - Base
Assemb ly
BA86 5 - P2 .1 - 4 MB
BA87 5 - P2 .1 - 2 MB
BIOS
BA 849 & BA 858
Rev. 1. 06
BA 865 & BA875
Rev. 1. 06
POWER SUPPLY
PS14 220 V
Level: 04 M I
PS14 110 V
Level: 04 M I
CONSOL E
IF 638
Level: 0.1
HDU INTERFACE
MI 549
15
P750 15-1
Page 2
Personal Comp ut er - Pock et Se rv ice G uide
MOTHERBOARD
LEVEL D.R.S.
CODE
Nasc.
412935 G PPUS U118
ROM BIOS INTEGRAT ED CO N TROLLER AND
MODIFICATIONS
See table below. 4 MB boar ds.
PPUT U119
There are only 42 boards of this le vel
Rev. 1. 02
Lev. 0.1
BA849
Lev. 02
Lev. 03
Rev. 1. 02
Rev. 1. 02
Rev. 1. 06
Factory ver sion which cor r ects f loppy disk
write problem s.
Change on timer circuit
New BIOS to solve t he pr ob le m of the 12 0 M B
hard disk during sy st em configur at io n
Nasc.
412934 F PPUS U118
PPUT U119
See table below. 2 MB boar ds.
There are only 42 boards of this le vel
Rev. 1. 02
Lev. 0.1
BA558
Lev. 02
Lev. 03
Rev. 1. 02
Rev. 1. 02
Rev. 1. 06
This board includes the sam e mo difica tion s
made to the pr evious .
Printed cir cuit P2.1 - Base Assem b ly - Code BA880 ident if ie s the pr inte d circ uit P2. 1 on
which SIMM m od ules ar e to be moun te d acco rd ing to me m ory size. The print ed cir cuit w ith
SIMM modu le s insta lle d takes the n a me of the BA boar ds des cr ibed below.
BA880
Nasc.
Lev. 02
New BA865
Lev. 03
Lev. 04
Lev. 05
Lev. 06
PPUS U118
PPUT U119
Rev. 1. 02
PPJJ U118
PPJK U119
Rev. 1. 04
Rev. 1. 05
Rev. 1. 05
Rev. 1. 05
Rev. 1. 06
New printed circuit (BA880) with 4 MB. This
board has the sam e comp onen ts as BA849.
Solves "Par a lle l Port Test Erro r" pr oblem at
POD, suppor t s the new video mo dalities and
improves 15H interrupt feat ur es in CBIO S.
Allows the step D0 version of the Intel 80486
processor to be used.
New BIOS to solve t he pr ob le ms of :
CBIOS POD, Floppy, INT10
ABIOS Parallel and serial
C&T component F82C452A introduce d to
replace the F82C452 component . This also
involves replacement of the 74F2 44
component in positio n U32 with the
74FCT244CT com pone nt.
New BIOS to solve t he pr ob le m of the 12 0 M B
hard disk during sy st em configur at ion.
15-2 P750
Page 3
Personal Com puter - Pocket Ser vice G uide
LEVEL D.R.S.
Lev. Nasc.
Lev. 02
BA875
Lev. 03
Lev. 04
Lev. 05
Lev. 06
CODE
ROM BIOS INTEGRATED CONTROL LER AND
MODIFICATI O NS
PPUS U118
PPUT U119
New printed circuit (BA8 80) with 4 MB. This
board has the sa m e com po nent s as BA849.
Lev. 1.02
PPJJ U118
PPJK U119
Lev. 1.04
Lev. 1.05
Solves "Parallel Port Test Error " problem at
POD, suppor ts the new video mo d al ities and
improves 15H int er rupt fea ture s in CBIO S.
Allows the step D0 version of the Intel 80486
processor to be us ed
New BIOS to solve problem s of:
CBIOS POD, Floppy, INT10
ABIOS Para llel and serial
Lev. 1.05
C&T component F82C45 2A in trod uced to
replace the F82C452 componen t. This also
involves replacement of the 74F24 4
component in position U32 with the
74FCT244CT comp onen t.
Rev. 1.05
Rev. 1.06
New BIOS to solve the pr oblem of the 120 MB
hard disk during sys te m conf igur at ion.
BOARDS
FUNCTION DESCRIPTION D.R.S. CODE CHARACTERISTICS
CPU system board
CPU system board
CPU system board
CPU system board
Power supply 220 V
Power supply 110 V
Console board
Intelligent HDU
interface b o ar d
BA858
BA849
BA865
BA875
PS14
PS14
IF638
MI549
412934 F
412935 G
412908 W
412909 X
497314 P
497272 V
P1.5 - 2 M B
P1.5 - 4 M B
P2.1 - 4 M B
P2.1 - 2 M B
120 MB hard disk can repla ce
100 MB hard disk without any
prob le m
15
P750 15-3
Page 4
Personal Comp ut er - Pock et Se rv ice G uide
INTEGRATED CONTROLLERS INTEGRATED CONTROLLERS
82C322 Memory Controller
Supports 256 K - 1M DRAM
Shadow RAM
Support s up to 16 MB
Prog ra m m ing of Wait stat es
82C223 DMA Controller
Perform s DMA ope ra tion s
8 indipendent DMA channels
Extended mode operations
16 MB memor y addr es sing cap acit y
DMA serial ope ration s
Supplies a virtual DMA on chann els 0 and 4
8042 Keyboard and m ouse controller
82C452 Supe r VGA Video adapt er
NS16550 ASerial port controller
WD57C65 Floppy disk control ler
82C325 Data Buffer Controller
Bus Conversion and Bus Swapping f unc tion
Generat ion and check ing of parity err or s in
DRAM
Contains PO S re gist ers in MCA arch itec ture
82C226 Non-volatile RAM
Real Time Clock
DMA controller
Interr u p t co ntroller
82C226 Two interrupt contr o llers 8259
An 8254 compatible time r
Watchdog timer
A real time clock compatible
with MC146818
114 bytes of CMOS RAM
Parallel port controller
82C231 MCA controller
MCA Compatibility
Memory timing
Bus Converter 32 - 16 bit
USER DISKETTE/SYSTEM TEST/DRIVER
LEVEL COMPATIBILITY
User Diskette Version 1.00
User Diskette Version 1.01
EVD Driver Version 3. 0 Rev. 1.2
EVD Driver Version 4. 0 Rev. 1.3
Compatible with BIOS 1.02
Supports Rel. 10 and 11 of ACAD386
Solves the problem in O S/ 2 PM 1.2 DAM driver
EVD Driver Version 5. 0 Rev. 5.0
This version su ppor ts DAM modes (10 24 x 768 x 256)
for Windows 3. 0, AutoCAD 386 Ver. 10. 0 and
AutoCAD 386 Ver. 11.0
EVC Driver for ACAD10 and ACAD11
D.A.M. Driver for OS/2 P.M.
To be used only when request ed
To be used only when request ed
CONSOLE
LEVEL D.R.S.
COMP A TIBILITY
CODE
Lev. Nasc.
Lev. 01
IF638
497314 P
Change to confor m with EMI rules
15-4 P750
Page 5
PS14/PS14H POWER SUPPLY UNIT
POWER SUPPLY LEVEL NOTES
PS14 Ver. 220 V
HANTAREX
Lev. Nasc.
Lev. 01
Improved vent ilat ion and elec trical noise susce ptib ility.
Personal Com puter - Pocket Ser vice G uide
PS14 Ver. 115 V
HANTAREX
PS14 H Ver. 220 V
HANTAREX
PS14 H Ver. 115 V
HANTAREX
PS14 H Ver. 220 V
ALITEC
Lev. 02
Lev. 03
Lev. 04
Lev. Nasc.
Lev. 01
Lev. 02
Lev. 03
Lev. 04
Lev. Nasc.
Lev. 01
Lev. Nasc.
Lev. 01
Lev. Nasc.
Lev. 01
Introduced a m ylar prot ect ion bet wee n L101 induct anc e
and support for power supply unit compliance with
safety rules.
Removed mylar pr otection. A new type of induc tor is
used to comply wit h saf et y norm s.
Conforms with the new r ules co ncer ning reinfor ce d
insulation and re lia bi lity impr ovem e nt .
Modified TL7705 (IC351) compone nt .
This version has undergo ne t he sam e mo difica tion s as
the 220 V version.
New type of power supply unit.
A capacitor has been re placed to solve the problem s
with th e IR- M A 3 b o ar d.
New type of power supply unit.
Same modifica tion s as made to the 220 V version.
New supplier for this type of power sup ply unit .
A capacitor has been re placed to solve the problem s
with th e IR- M A 3 b o ar d.
15
PS14 H Ver. 220 V
ALITEC
Lev. Nasc.
Lev. 01
New supplier for this type of power sup ply.
Same modifica tion s as made to the 220 V version.
MI549 HARD DISK INTERFACE
LEVEL NOTES
Lev. Nasc. Specific for the P750
P750 15-5
Page 6
KEYBOARD
CONTROLLER
MEMORY
CONTROLLER
BUEOA
Personal Comp ut er - Pock et Se rv ice G uide
SYSTEM BOARD COMPONENT S, JUMPERS
PARALLEL PORT
WATCH DOG TIMER
REAL TIME CLOCK
VIDEO RAM
82C452
VGA
PLUS
BT471
DAC
FLOPPY DISK
CONTROLLE R
DMA
CONTROLL E R
DATA BUFFER
CONTROLLER
SERIAL PORT
FLOPPY DISK
CONNECTOR
BANK 1
BANK 0
BIOS
BUS
CONTROLLER
CPU
J3
JUMPER J3 OUT: Normal setting
IN: Disables password
Cancels the sys tem conf igur at ion and resto res
the default se ttings
15-6 P750
WEITEK
COPROCESSOR
Page 7
Personal Com puter - Pocket Ser vice G uide
SOFTWARE COMPATIBILITY
OPERATING SYSTEMS NOTES
IBM DISK Operating Syst em, Ver. 4.01
During installation on ha rd disk, a
formatted DSDD disk is requir ed.
IBM Oper at ing System/2, Ver. 1.10
IBM Operat ing Syst em /2 Ext en ded Edit ion,
Ver. 1.1 and Ver. 1.10
Olivetti’s Micr osoft OS/2, Ve r. 1. 10
HARDWARE COMPATIBI LITY
MODEMS I/O INTERFACE PRODUCTS
Hayes Smar t modem 12 0 0P
Hayes Smar t modem 24 0 0P
FUTURE DOMAIN HOST ADAPTER (MCS-350)
IBM PS/2 Dual Async Adapter/ A (64503 47)
IBM PS/2 300/1200 Inte rn al M odem/A
(6450349)
EXPANSION MEMORIES MOUSE
IBM PS/2 80386 2-6 MB Exp. Memory Option
IBM PS/2 80386 2-8 MB Exp. Memory Option
Olivetti Memo ry Expans io n board M EM 26-50 3
Profit System Elite 16/ 2
IBM PS/2 Mouse (64503 50)
Microsoft Serial Mouse
MSC PC Mouse PS/2
Olivetti New Advanced Mou se ( GRD 25- 025)
DISPLAY UNITS NETWORKS & LAN PRODUCTS
IBM PS/2 Monoch ro me D isplay 850 3
IBM PS/2 Color Display 8512
IBM PS/2 Color Display 8513
IBM PS/2 Color Display 8514
IBM PC Ne twork
IBM PC Network (Baseband Ada pt er)
IBM Token Ring Networ k
Novell Advanced netware Ver. 2.12
3COM Network (Ethernet)
10NET Network
GRAPHICS PRODUCTS OTHER PRODUCTS
IBM PS/2 Disp lay Adapter 8514/A
SOFTWARE SECURITY Para llel Port Block
MATROX PG2 - 1281 HI-RES G raphics
Controller
15
P750 15-7
Page 8
Personal Comp ut er - Pock et Se rv ice G uide
SYSTEM MEMORY MAP
ADDRESS SIZE FUNCTION CACHE
00000000 - 0007 FFFF
00080000 - 0009 FFFF
000A0000 - 000BFFFF
000C0000 - 000DFFFF
000E0000 - 000FFFFF
00100000 - 007FFFFF
00800000 - 00FFFFFF
01000000 - BFFFFFFF
C0000000 - C1FFFFFF
C2000000 - DFFFFFFF
E0000000 - FFFDFFFF
FFFE0000 - FFFFFFFF
512 K
128 K
128 K
128 K
128 K
128 K
System DRAM
I/O RAM
Video adapter RAM
I/O ROM
BIOS (SHADOW RAM)
System RAM
System RAM
System RAM
Weitek Coprocessor
System RAM
System RAM
ROM BIOS
YES
YES
NO
NO
YES
YES
YES
YES
NO
YES
YES
NO
DMA CHANNELS
CHANNEL FUNCTION CHANNEL FUNCTION CHANNEL FUNCTION
0
1
2
Reserved
Usable
Floppy disk
3
4
5
Usable
Reserved
Usable
6
7
Usable
Usable
I/O ADDRESS MAP
ADDRESS FUNCTIO N ADDRESS FUNCTION
000- 01F
020-021
022
023
040-047
060
061
064
070 - 071
074 - 076
081 - 087
089 - 08F
090
091
092
093
094
DMA contro ller ( chan nels 0- 3)
First int er rupt cont r ol le r 82 59 A
System Set up Index in g registers
System Set up Dat a regist er s
Syst em Tim er
Auxiliary device
System Port B controller
Auxiliary device
RT/CMOS and NMI mask
8 KB CMOS RAM expa nsion
Register s for conf ig urin g
registers 68B50
DMA register s pa ges 0 - 3
DMA register s pa ges 4 - 7
Centra l arbitratio n contr ol por t
Response fro m selected bo ar d
System Port A controller
Reserved
Boar ds enable
096 - 097
0A0 - 0A1
0C0 - 0DF
0E0
0E1
0E2
0E3 - 0E7
0F0 - 0FF
100 - 107
1F0 - 1F8
278 - 27B
2F8 - 2FF
378 - 37B
3BC - 3BF
3B4 - 3C5
3CE - 3DA
3C6 - 3C9
3F0 - 3F7
3F8 - 3FF
POS, Conn ect or select
Second inter r upt controller 8259 A
DMA contro ller ( 4 - 7)
Split address register
Memor y map r egist er
Cache cont ro l register
Channel rest or e r egisters
Coprocessor
Program m able opt ion se lect
Hard disk adapter
Parallel port 3
Serial port 2 (RS-23 2- C)
Parallel port 2
Parallel port 1
Video subsystem
Video subsystem
Video DAC, Bt471
Floppy disk cont r ol ler
Serial port 1 (RS- 232-C)
INTERRUPT LEVELS
LEVEL FUNCTION LEVEL FUNCTION
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
Channel 0 of time r ou tp ut
Keyboard interface
Interrupt from PIC2
Optional serial port
Primary ser ial por t
Available
Floppy disk cont r ol ler
Parallel port
RQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Real Time Clock
Redirect ed via sof twar e t o IRQ2
Available
Available
Mouse
Coproces sor
Hard disk controller
Available
15-8 P750
Page 9
Personal Com puter - Pocket Ser vice G uide
COMPATIBLE HARD DI SKS
TYPE MODEL CAPACITY CYL T WPC LZ SET
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35 - 45
N.C.
Seagate ST225 half size
WREN 2 full size
CDC WREN 1
ST4096
OPE XM5340
NEC D5146H
TM755 slim size
CDC WREN II slim size
Micropolis 1324 fu ll size
CDC WREN II full size
Micropolis 1325 fu ll size
CDC WREN II full size
Micropolis 1323- A fu ll size
RESERVED
OPE XM5220 85 ms
TANDON TM 362 85 ms
Seagate ST251 40 ms
Rodime RO3055 40 ms
Miniscribe M84 25 68 m s
Seagate ST277TR
OPE XM5340/60
NEC D5147H
NEC D5652
Micropolis 1355 ESDI
Micropolis 1353 ESDI
NEC D5452
Fujitsu M2227D
Fujitsu M2227D RLL
CDC 94205-77
Formatted, ESDI full size
Formatted, ESDI half size
N.A.
CDC 94196-766
RESERVED
10 MB
20 MB
38 MB
28 MB
76 MB
40 MB
40 MB
40 MB
40 MB
51 MB
53 MB
68 MB
69 MB
42 MB
20 MB
20 MB
40 MB
43 MB
20 MB
62 MB
62 MB
62 MB
136 MB
135 MB
67 MB
68 MB
40 MB
60 MB
62 MB
304 MB
81 MB
136 MB
600 MB
306
615
925
697
1024
820
615
981
981
1024
925
1024
925
1024
612
612
820
872
612
820
820
615
820
1021
1021
823
615
615
981
814
977
820
1623
4
4
5
5
9
6
8
5
5
6
7
8
9
5
4
4
6
6
4
6
6
8
10
8
4
10
8
8
5
15
5
10
15
128
256
128
128
-1
256
128
-1
128
128
128
-1
128
-1
128
-1
-1
0
0
-1
128
384
-1
-1
-1
512
512
512
-1
-1
-1
-1
-1
305
700
924
696
1023
819
664
980
980
980
924
1023
924
1023
656
663
819
871
663
819
819
664
822
1023
1023
822
614
614
980
1
1
1
1
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
26
26
26
34
34
34
17
17
26
26
-
-
-
-
15
Where: CYL: No. of disk cylinder s
T: No. of disk heads
WPC: Precomp ensation cyliunder number
LZ: Head parking cylinder number
SET: No. of disk sect ors
P750 15-9
■
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