Page 1
Personal Com puter - Pocket Service G uide
M24 - M21 - M24 SP
CHARACTERISTICS
Microprocessor 8086, 16 bit
Clock 8 MHz (M24, M21) 10 MHz (M24 SP)
RAM access tim e 150 ns (M24, M21) 120 ns (M24 SP)
Wait states 1 (M24, M21) 0 (M24 SP)
Maximum RAM capacity 640K bytes
ROM BIOS memory -
BOARDS
FUNCTION DESCRIPTION D.R.S. CODE CHARACTERISTICS
System Board/CPU
System Board/CPU
System Board/CPU
System Board/CPU
System Board/CPU
Bus Converter/Bus 2407
Bus Converter/Bus 2403
Video Adapter
Video Enhanced Adapter
Video Adapter
1.2 MB MFD Adapter
D.T.C./HDU Ada pter
H.D. U. W . D. Ad a pt er
H.D. U. W . D. Ad a pt er
CPU Alternate
Memory Expansion
Memory Expansion
Memory Expansion
Power supply
Power supply
Power supply
Micro Box Inter face
Keyboard Ada pter
BA106/121/13 5
BA139/170/17 1
BA196
BA801
BA177
IF172/IF272/ IF31 4
IF249
GO317/ GO 318/ G O38 0
GO329
GO362
GO703
GO310/GO349
GO391
GO425
GO330
ME048/M049
ME062
ME056STL
LC07
LA16
LA16B
IF362
MI293
414369 A
414091 G
411298 Z
411031 G
411187 A
411038 P
48741 P
411216 N
48193 H
411053 N
414194 C
411032 H
411423 E
48199 E
48613 C
411369 F
414093 A
411052 M
411743 W
491230 Z
640 KB in System Board
M24 SP/640 KB
M24 SP/640 KB
M24/M24 SP
M21 (3 Slot 8 Bits/16 Bits)
EGC 2413
M24 3270
M24 SP (Bit 56 )
Bios 1.36
M24 SP (Bios 1.36 lat er )
CPU Z8001/APB2481
Single In Line (CDM 5,4)
Bios 1.43/MSDOS
3.20 /3.27
Emulates 8741 Nivel
CSNZ (1.1)
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M24 - M21 - M24 SP 1-1
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Personal Comp ut er - Pock et Se rv ice G uide
PAL AND ROM BIOS LEVEL
M24/M21
FUNCTION POS. EVOLUTIO N
PBFBH
ROM Bios
Bus Adapter
Wait Logic
RAM Add.
I/O Logic
KBC uC 8741
KBC uC 8041
Keyboard
Firmware
NOTE: (ANK 2463 = IBM Y ANK 2462 = OLIVETTI )
M24 SP
FUNCTION POS. EVOLUTIO N
ROM Bios
Bus Arbiter
Wait Logic
RAM Add.
I/O Logic
6 F
6 H
8 H
6 J
2 P
6 E
10 U
6 F
6 H
8 H
6 J
2 P
6 E
PBCFL
PL48
PL95
PL49
PL51
CSNE/CSHX
PDBA/PDBB
PBFW 1.36H
PBFV 1.36L
PL86
PBFX
PL90
PL85
1.0H
1.0L
PBFD
CSNY/CSNZ
PDBE (1.1)
PQBK 1.43H
PQBL 1.43L
PBFZ
1.10H
1.10L
PL51
PL74
CS40
PDBP (1.2)
1.21H
1.21L
PL52B
PDBP (2.1)
1.36H
1.36L
PL90
1.43H (PQBK)
1.43L (PQ BL)
PBFY
COMPATIBILITY
PBFY (M24)
(CDM 1.60.60.1/5 2 5)
PBFZ (M24 SP)
PL52 (M 24)
(BIT 1 60.69.5/24
PL74 (M 24)
(BIT 1 60.60.5/24)
PL90 (M24) *
(BIT 1 60.60.5/48)
BIOS 1.10 Does not suppor t MS-DO S REL. 3.20 REV. 327
BIOS 1.36
(BIT 1 60.60.5/48)
BIOS 1.43 *
(CDM 160.60.1/529)
(BIT 1 60.60.5/58)
(*) ROM BIOS 1. 43 + LP90 ma nage EGA emu la tion
Solves timin g problem s of th e 8250 ser ial inter f ace
contro ller an d (bit 05) keyboar d co nt ro ller
To install APB card
Possibility of selecting between 82 50 and 8530 by switch
RAM Address improvement
Born with 1.36 BIOS release
"Frame Work" and "Symphony" compatibility
Extends H. D. tab le in W. D. Adapter (GO 39 1)
COM2/EGC/ CO PRO CESSO R r ight manage ment
Manages: MFDU 3. 5" 720 KB
Token Ring L.A. N.
EGA Compatibility
1-2 M24 - M21 - M2 4 SP
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H
0
Personal Com puter - Pocket Service G uide
SYSTEM BOARD SETTINGS:
M24, M21: BA106/BA121/BA135/BA139/BA170/BA171/BA196
M24 SP: BA801/BA177
GROUP 1
UP1
PIT
GROUP 0
PIC
FDC
B
1
SCC
ACE
DMAC
NDP
CPU
G
BANK
1
DIP-SWITCHES OF GROUP 0
AREA 1234FUNCTION
RAM Capacity OFF ON ON ON 128 KB System Board
ON OFF ON ON 256 KB PB
256 KB PB
OFF OFF ON ON
128 KB PEXP
256 KB PB
ON ON OFF ON
256 KB PEXP
256 KB PB
OFF ON OFF ON
384 KB PEXP
ON ON ON OFF 512 KB Bank 0
512 KB PB Bank 0
OFFONONOFF
128 KB PB Bank 1
128 KB PB Bank 0
OFF ON OFF OFF
512 KB PB Bank 1
ROM L
ROM H
BQA5A
AREA 5678FUNCTION
Coprocess or ON Not installed
OFF Installed
Serial
Interface
System memory from
BIOS REL. 1.36
ON 8250 ACE Asynchronous
OFF 8530 SCC Synchronous
ON RAM Bank 0
OFF RAM Bank 0 and 1
M24 - M21 - M24 SP 1-3
Page 4
Personal Comp ut er - Pock et Se rv ice G uide
DIP-SWITCHES OF GRO UP 1
AREA 1234FUNCTION
Floppy Disk Unit OFF 720 KB (3.5")
ON 3 60 KB (5 .25")
Speed ON Startup 800 ns
OFF Startup 250 ns
EPROM-BIO S ON ROM HDU System board
OFF ROM HDU External
Video ON Scroll CPU
OFF Slow scroll
AREA 5678FUNCTION
Monitor type OFF OFF 80 x 25 monochrome
OFF ON 40 x 25 colour
ON OFF 80 x 25 colour
ON ON EGA (*)
MFDU ON ON 1 MFD unit
OFF ON 2 MFD units
(*) BIOS 1.43 only
JUMPERS (ONLY M24 SP BA801/BA177)
JUMPERS POS. F UNCTION
B1 - B2 CLOCK 8 MHz FDC
B
B2 - B3 CLOCK 4 MHz FDC
OUT Floppy co ntro ller ena bl e
G
IN Floppy cont ro ller disable
JUMPERS POS. F UNCTION
H-1 8087 8 MHz
H
H-2 8087 10 MHz
OUT Normal
C and E
IN Product ion test
KEYBOARDS COMPATIBILITY
TYPE PROTOCOL LAYOUT
ANK2462
ANK2463
ANK2502
ANK2886
ANK25-102
Olivetti
Olivetti
Olivetti
Olivetti
Standar d AT
Olivetti
IBM
M240 type
M28 type
101/102 keys
1-4 M24 - M21 - M2 4 SP
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Personal Com puter - Pocket Service G uide
COMP ATIBILIT Y NOTES
Management of M24 SP for 5.25 1. 2 MB MFDU set t ings t o be made :
- Disable floppy disk controller of system board
- Make modifications des crib ed in CO M 505 M24
- Insert new MFD adapter in the bus con ver t er GO70 3
Needed for insta llation of following options : (See CDM 52 0)
- EGC 2413 board (GO329): RO M BIOS 1. 36 S y stem boar d
PAL 90 System board
PAL 73 Video Contro ller G O 317
- 8087 Coprocessor: RO M BIOS 1. 36
PAL 90
- Serial interface: ROM BIOS 1.36
PAL 90
- Mouse GRD 2469: Keyboard Firmwa re PDBN (BIT G15)
- APB 2481 (CPU Z8001) PAL PL52 (BIT 24)
1
I/O ADDRESS MAP
ADDRESS FUNCTION
000-00F
020-021
040-043
050-053
060-063
064
066-067
070-07F
0F0-0FF
210-217
2F8-2FF
320-32F
378-37F
380-38F
3C0-3CF
3D0-3DF
3F0-3F7
3F8-3FF
DMA controller
Interrupt controller
Timer
Serial controller (85 30)
Parallel controller
(8255)
Keyboard
System configuration
Date an d time
PROM addre ss
Expansion box
Serial port 2
Hard disk controller
Parallel port 1
SDLC communication
Reserved
Video adapter
Floppy disk controller
Serial port 1 (8250)
INTERRUPT LEVELS
LEVEL FUNCTION
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
DMA CHANNELS
CHANNEL FUNCTION
DMA0
DMA1
DMA2
DMA3
Timer
Keyboard
Available
Available
Serial po rt
Hard disk
Floppy disk
Parallel port
RAM refr e s h
Available
Floppy disk
Available
■
M24 - M21 - M24 SP 1-5
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