Epson 486DX2 User's Manual

®
EQUITY 486DX2/50 PLUS
®
EQUITY 486SX/25 PLUS
Product Information Guide
Quick Reference
Computer Specifications ...... .486DX2/50 & 486SX/25 PLUS-1
Connector Pin Assignments .486DX2/50 & 486SX/25 PLUS-2
DMA Assignments ................. 486DX2/50 & 486SX/25 PLUS-3
Hardware interrupts.. ............. 486DX2/50 & 486SX/25 PLUS-3
I/O Port Addresses ............... .486DX2/50 & 486SX/25 PLUS-3
Jumper Settings ................... .486DX2/50 & 486SX/25 PLUS-3
SIMM lnstallation .................. .486DX2/50 & 486SX/25 PLUS-4
Hard Disk Drive Types ......... .486DX2/50 & 486SX/25 PLUS-4
lnstallation/Support Tips.. ...... 486DX2/50 & 486SX/25 PLUS-5
Information Reference List .. ..486DX2/50 & 486SX/25 PLUS-5
EPSON”
EQUITY 486DX2/50 PLUS
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Controllers
Diskette
Supports up to two drives in any of four
formats: 5%inch, highdensity, 1.2MB;
5%inch, double-density, 360KB;
3%inch, highdensity, 144MB; or
31h-inch, double-density, 720KB; also
supports optional Epson tape drive;
controller on main system board
Hard disk
Supports up to two half-height drives;
embedded IDE controller; interface on main
system board
Interfaces
Monitor
VGA adapter with 1MB DRAM (video
memory) built into main system board;
supports up to 800 x 600 or 1024 x 768
pixels in &colors or up to 640 x 480 pixels
in 256-colors; multi-frequency monitor
required for resolutions over 640 X 480
Serial
RS232C, programmable, asynchronous;
9-pin, D-shell connector
Computer Specifications
Parallel
Standard &bit parallel, mono-directional;
25-pin, D-shell connector
CPU and Memory
Mouse port
Mini DIN, 6-pin connector for PS/2
compatible mouse or other device
Keyboard
Mini DIN, 6-pin connector for F’S/2
compatible keyboard
Option slots
Six standard input/output expansion slots
(five 16&t ISA compatible and one &bit
ISA compatible); 8 MHz bus speed
15-pin, D-shell connector
32-bit CPU
25 MHz system: 804865X processor,
50 MHz system: 80486DX2/50 processor
System speed
25MHzregardlessofCPU;for80486DX2/50,
50 MHz speed is internal only; 8 MHz
speed is simulated by inserting wait states;
high/low speed selection through software
or keyboard comman d; 0 wait state
memory access at high speed
System memory
Internal; operation controllable by the Setup
program
4MB RAM standard soldered onto memory
board; base memory of 256KB, 512KB or
640KB selectable through jumpers.
Power Supply
Memory expandable using 256KB or
IMB SIMMS, up to 16MB (maximum);
SIMMs must be fast-page mode, 80ns access
speed (or faster)
ROM
128KB (includes system BIOS and VGA
BIOS)
Shadow RAM
0 wait state acceSS speed; automatically
copies both ROM BIOS and video ROM
intoRAM
Math coprocessor
Standard for 50 MHz model; on 25 MHz
model, 80486SX microprocessor can be
replaced with optional 80487SX chip
Cache controller
82385 (25MHz) standard
Cache RAM
32KB high-speed (251-u) static RAM; twoway set associative.
Clock/calendar
Real-time clock, calendar, and
50-byte CMOS RAM for configuration;
battery backup
Equity Series Computers
Type
2OOW, fan-cooled, automatic (worldwide)
input voltage sensing
Input ranges
98 to 132 VAC and 195 to 264 VAC
Maximum outputs
+5 VDC at 22 Amps, +12 VDC at
6.8 Amps
-12 VDC at .50 Amps, -5 VDC at
so Amps
Mass Storage Bays
Up to five drives maximum
Internal drive bay
Two half-height or one full-height drives
Externally-accessible One third-height and two half-height drives
or one third-height and one full-height
drive bay
drives
5/12/92
486DX2/50 & 486SX/25 PLUS-l
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Serial Port Connector (CN4)
Keyboard
Detachable, two position, 101/102 (countrydependent) sculpted keys
Layout
58-key QWERTY main keyboard;
17-key numeric/cursor pad; 10 cuxsor keys;
additional Pkey cursor pad; 16 function
keys (user-definable)
Function
Four levels (normal, shift, control,
alternate); user-definable
Serial Port Connector Pin Assignments
Environmental Requirements
~
Altitude
-330 to 9900 It
(-100 to 3000 m)
6FP F
(200 C)
Maximum
wet bulb
-330to11660tt
(-100 to 3600 m)
104O F
(400 Cl
-330 to 39600 n
(-100 to 12000 m)
134°F
(5P C)
Keyboard and Mouse Connector (CNZ and CNl)
17 inches (432 mm)
Depth
16 inches MO6 mm)
Height
6 inches (153 mm)
Weight
Single diskette drive model:
26 lb (11.8 kg)
(without
keyboard)
,Pin 5
Pin 44
& Pin 3
w
Physical Characteristics
Width
Pin 6.
PinI*Pinl
Although the keyboard and mouse connectors are physically
identical, they cannot be used interchangeably.
Keybwd Connecbr Pin Assignmenfs
Pin
1 signal
1
12
3
4
5
6
Connector Pin Assignments
Parallel Port Connector (CN5)
1 Kevboard Data
1 ReseNed
Ground
+5 VDC
Keyboard Clock
Reserved
I
1
Pin 1
Pin 13
Mouse Connector Pin Assignments
Pin
1 signal
g-1
Pin 25
Pin 14
Parallel Port Connector Pin Assignments
1
12
3
4
5
16
1 Mouse Data
1 Reserved
Ground
+BVDC (fused)
Mouse Clock
1 ReseNed
I
I
VGA Connector (CN3)
7
6
.9
DATA5
DATA6
DATA7
16
17
16
INITSEECTIK
SIGNAL GND
25
SIGNAL GND
‘Ache Low Logic
486DX2/50 & 486SX/25 PLUS-2
5/12/92
Equity Series Computers
EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
I/O Port Addresses (continued)
VGA Connector Pin Assignments
Phi
Slgnal
1
2
!3
Red Video
I Green Vrdeo
1Blue Vrdeo
‘4
5
/ Unused
/ Ground
Red Return
Green Return
Blue Return
3
7
6
Pin
4
10
11
SIgnsI
Key
sync Return
1 Reserved
ii2
113
14
15
Reserved
1Honzontal sync
Vertcal Sync
’ unused
I
DMA Channels
I
Channel
,O(CTRLl)
1 (CTRL 1)
:P(CTRLl)
~3 (CTRL 1)
4 (CTRL 2)
t
5 (CTRL 2)
,6(CTRL2;
j 7 (CTRL 2)
Function
Spare
SDLC
Floppy drsk dnve controller
Spare
:*ddress
1OF1
1OF8 - OFF
i 170- 176
160-185
1BF’
lFO-ln
200 - 207
278 - 27F
1278
2F6 - 2FF
,300.31F
370 - 377
Aeslgnsd device
: Reset math coprocessor
Math coorocessor
1Hard dtsk controller secondary
i Contlguratlon regtsters
/ Conlrguratron register unlock port 1
I Hard disk controller pnmary
1 Game I/O
~Printer port 2 (278 and 27F are unused)
i Confrguratron regtster unlock port
1 Serial port 2
Prototype card
Floppy drsk dnve controller secondary
! 378 - 37F
370
360-38F
3A0 - 3AF
380 - 3BF
3D0 - 3DF
Parallel printer port 1 (378 and 37F are unused)
i ConfIguratIon register unlock porl2
1SDLC. btsvnchronous wmmumcatron 2
1 Blsynchronous wmmumcatron 1
1Monochrome dtsplay and pnnter adapter
/
I
1
I
1 Color/graphtcs monltor adapter
/ Floppy disk drive wntroller pnmary
3F0 - 3R
1 Senal port 1
/ 3F8 - 3FF
* These I/O address ports are wnllguratlon registers.
Cascade for CTRL 1
I Soare
1
Spare
1 Spare
Jumper Settings
The illustration below
main system board.
Hardware Interrupts
shows the locations of the jumpers on the
memory board
/ Functlan
I CTRLl
m
IRQO
i Timer Output 0
IRQl
/ Keyboard
IRCX?
! Interrupt from Controller 2
IRQ3
senal port 2
IRQ4
Send port 1
1 IRQS
Parallel port 2
IRC6
Floppy drsk interrupt
IRQ7
Parallel potl 1
IRQB
RTC Interrupt
IR09
Software redrrected to IRQ2
IRQlO
1 Reserved
IRQll
j Reserved
IRQ12
Mouse, pomtmg dewce
IRQ13
Coprocessor
IRQ14
Hard dusk wntroller
1 Reserved
/ IRQ15
.
* 25 MHz system only
JP7
JP8
JP9
JPlO
JPll
JP12
JP13
JP14
JP15
Miscellaneous jumper settings
Jumper
number
JP4
l/O Port Addresses
1Addmo
1OW-OlF
/ Aulgned devh
1I DMA controller
1
- - -.-..-
020 - 021
I 40 - 05F
1060-06F
Interrupt controller 1
/ Trmerlwunter
1Kevboard controller 180421
1 070 - 0%
060-OQF
OAO - OBF
OCO - ODF
I OF0
RTC. NMI mask regrster
DMA page registers, MFG port
Interrupt controller 2 (625QA wmpabble)
DMA controller 2 (6237A-5 compabble)
Clear math coprocessor busy
Equity Series Computers
Jumper
! ssttlng
~ ;
1
/
JP5
/
JP6
JP7
JP15
it
A’
0
A’
I 0
I
j A
B
’ Factory settmg
5/12/92
Functlon
Enables the burii-m VGA display adapter
Disables the burlt-in VGA display adapter so you
can use a dtsplay adapter on an optron card as
your primary adapter
Enables the power-on password
Drsables the power-on password
Color monitor IS mstalled
Monochrome monitor IS mstalled
1
I
Enables the buril-m mouse wnnector
Disables the built-m mouse connector so you can
use a mouse or other pointing devrce connected to )
a port on an option card
I
Enable the early input/output ready signal
Sets a normal mput/output ready slgnal
486DX2/50 & 486SX/25 PLUS-3
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Jumper settings for base memory
Base memory
640KB
512KB
,256KB
* Factory setting
SIMM configurations
Jumper JP13
A
Jumper JP14
~A’
,B
!B
Bank1
AMMM
IA
lB
/
Jumper settings for extended memory
T&d
memory
~ 4MB
1 Jumper
! JPB
B
i 6MB
B
1 QMB
A
I 10MB
A
12MB
A
16MB
A
* Factory setting
$v
0
B
!B
!A
]B
IA
Jumper
JPlO
B
;B
IB
0
A
A
Jumper
JPll
0
A
A
A
A
A
i Jumper
JP12
!
A
A
A
,
IA
(A
jA
Jumper settings for alternate microprocessor
‘Jumper
number
JPl
Total memory
,6MB
IMMMM
iKKKK
‘KKKK
II4 M M M
K K K K
(MMMM
M M M M ~
/MMMM
MMMM
lMMMb.4
K=266KB SIMM mtalled
M=l MB SIMM mstalled
QMB
I’ 10MB
! 12MB
I16MB
Hard Disk Drive Types
The following table lists the types of hard disk drives you can use
in the computer. Check this table and the documentation supplied
with your hard disk to find the correct number for the type of hard
disk drive(s) installed in your computer. You need to enter this
number when you set the hard disk drive configuration in the
Setup program.
Hard disk drive types
’ Jumper
eelllng
IA
B
Functlon
80487SX wwalled
80486SX wWalled
JP2
80467SX mslalled; NMI slgnal
ii*
80486SX installed NMI slgnal
1JP3
1 60467SX mstallsd FERR stgnal
iA
0’
j 60466SX mstalled; FERR stgnal
I
* Factory settrig, these lumpers are not used for 60 MHz mtcroprocessor
Bank 3
Bank2
1
Tnmno.
I1
I
2
/
3
14
I
CvhJrr
306
615
I
I lrtors I Pmmm I lJndhP I sa
llrdr f&c)
17
4
17
4
(Wkobi) 1 mnm - (inHI)
128
I305
10
300
615
20
615
1840
6
18
17
117
I 300
1512
j ¶6
15
I17
1488
1615
IS40
30
Ifi?
I
I Drirrnmnl
mmufrtwa
Seagate ST225 and ST4026.
Watcm Dqnal WD-93042
Saapabz ST1 38A *
1
SIMM lnstallation
The SIMM sockets are labelled as shown below.
There are 12 SIMM sockets on the memory card organized in three
banks consisting of four sockets each. Each socket can contain one
memory module. You must fill all of the sockets in any bank you
use. Since each bank has four sockets, you must install four SIMMs
to fill up the bank
28
877
140
I
The following table shows all the possible SIMM configurations
for your computer. Do not install SIMMs in any other
configuration Remember that the memory card already contains
4MB (soldered).
486DX/50 & 486SX/25 PLUS-4
5/12/92
Equity Series Computers
EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
Hard disk drive types (continued)
Sadorr Rcomp Landing stm
Tvpono
Cylindm
Hmk
(tic)
WRom)
me
(al
Setup
- When installing a hard disk drive, be sure to consult the
Drnanarnd
mmulactuar
MB)
drive type table for the drive type parameters (geometry)
which fit the drive you are installing. You can also select a
type with parameters having lesser values, as long as they
do not exceed the maximum capacity (in MB) of your drive.
If there is no match for your drive, enter the exect
parameters using the User Defined option.
-nserved-
36
37
a3
116
134
! mn
1682
~
I38
548
18
138
Imn
/ 547
81
I 39
761
18
39
rme
'I760
I 115 ! CannrCP30104
40
I
,
I 41
980
1 IO
17
~~
1022
i5
34
I nori+
~ 1022
I84
1 CDG942lblO6"
142
I 1022
I Mne
1022
, 89
( CDG942lblffi
~ M~~p0l1~1325.At~l3085,
Lm%rLANEd.MaxtorXT1O85.
,&bu,.,,,DR,,)8.j
2 0 2 Conner cP3204F
I Malor7OmA
1 ToshbaMK-2024FC
,b3
1024
18
,I
~ canMrcP2048
1'
' 512
~ Ion
i M
44
828
IO
34
now
1828
~ 137
45
1024
5
17
512
11023
142
1
/
i
(
Software Problems
- When installing a copy-protected software package, first try
the installation at high speed. If this does not work properly,
try switching to low speed for the installation If you are still
unable to load the program at high speed, try loading at low
speed and then switching to high speed.
TorhbaMK-156F
46
615
8
17
128
j 618
40
47
-
-
-
-
j-
-'1 user dellred lype
For the Equity 486DX2/50 PLUS, high speed is 50 MHz.
For the Equity 48&3X/25 PLUS, high speed is 25 MHz.
Both systems simulate 8 MHz at low speed.
* Supwld In translate mode
** W~hWs~ernDgmlESOlcantlkr
-
lnstallation / Support Tips
Power
This computer has an automatic input voltage sensing power
supply (between 115V, for USA and Canadian use, and 23OV, for
use in other countries). There is no manual switch
Mouse and Keyboard
- When connecting the mouse and keyboard, be careful to
plug them into the proper ports. Although they are
physically identical, they are not interchangeable, and
damage may occur to the ports or the main board.
Installing Floppy Disk Drives
- When installing a floppy disk drive as drive B, remember to
set the drive select jumper to the second position and attach
the pass-through connector on the floppy drive controller
cable to the drive, not to the end connector.
-
-
If the drive does not function normally, make sure that the
drive type has been correctly selected in Setup. Also check
that any necessary drivers have been installed correctly.
If you have installed two floppy disk drives, remember that
the computer will boot from drive B when a disk is inserted
indriveBandnodi.skisinsertedindriveA.
Installing Hard Disk Drives
- It is recommended that a l&bit, AT-type hard disk
controller be used if you are installing a drive that cannot
use the embedded IDE interface. lnstalling a 16-bit interface
wilI override the embedded IDE port and disable it, freeimg
the standard base l/O address and lRQ(s).
Equity Series Computers
When using a software package that uses a key disk as its
copy-protection method, try loading it at high speed. If this
does not work, enable Auto Speed in Setup on the Reference
diskette.
Power-on Password
- Make sure that you do not forget the Power-on password
you set up. If you do, it wilI be necessary to disable it by
moving jumper JP5 on the main circuit board to position B.
Information Reference List
Engineering Change Notices
None.
Technical Information Bulletins
None.
Product Support Bulletins
None.
Related Documentation
TM-48625/50
Equity 486DX2/50 PLUS &
Equity 486SX/25 PLUS Service Manual
PL-486DX2/50
Equity 486DX2/50 PLUS Parts Price List
PL-486%25+
Equity 48fiSX/25 PLUS Parts Price List
SPK486DX2/50
Equity 486DX2/50 Self Paced Kit
Y73899110100
Equity 486DX2/50 PLUS
4&3X/25 PLUS User’s Guide
5/12/92
466DX2/50 & 486SX/25 PLUS-5

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