Epson Equity 486SX/25 PLUS Installation and operation 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
Hardwareinterrupts..
............. 486DX2/50 & 486SX/25 PLUS-3
I/O Port Addresses
............... .486DX2/50& 486SX/25PLUS-3
Jumper Settings
................... .486DX2/50 & 486SX/25PLUS-3
SIMM lnstallation
.................. .486DX2/50& 486SX/25PLUS-4
Hard Disk Drive Types
......... .486DX2/50 & 486SX/25PLUS-4
lnstallation/Support Tips..
...... 486DX2/50 & 486SX/25 PLUS-5
Information Reference List
.. ..486DX2/50 & 486SX/25 PLUS-5
EPSON
®

EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
Computer Specifications
CPU and Memory
32-bit CPU
System speed
System memory
ROM
Shadow RAM
Math coprocessor
Cache controller
Cache RAM
Clock/calendar
25 MHz system: 804865X processor,
50 MHz system: 80486DX2/50 processor
25MHz regardless of CPU; for 80486DX2/50,
50 MHz speed is internal only; 8 MHz
speed is simulated by inserting wait states;
high/low speed selection through software
or keyboard command;0 wait state
memory access at high speed
4MB RAM standard soldered onto memory
board; base memory of 256KB, 512KB or
640KB selectable through jumpers.
Memory expandable using 256KB or
1MB SIMMS, up to 16MB (maximum);
SIMMs must be fast-page mode, 80ns access
speed (or faster)
128KB (includes system BIOS and VGA
BIOS)
0 wait state access speed; automatically
copies both ROM BIOS and video ROM
into RAM
Standard for 50 MHz model; on 25 MHz
model, 80486SX microprocessor can be
replaced with optional 80487SX chip
82385 (25MHz) standard
32KB high-speed (25ns) static RAM; two-
way set associative.
Real-time clock, calendar, and
50-byte CMOS RAM for configuration;
battery backup
Controllers
Diskette
Hard disk
Interfaces
Monitor
Serial
Parallel
Mouse port
Keyboard
Option slots
Power Supply
Type
Input ranges
Maximum outputs
Supports up to two drives in any of four
formats: 5%inch, highdensity, 1.2MB;
5%inch, double-density, 360KB;
3%inch, highdensity, 1.44MB; or
31h-inch, double-density, 720KB; also
supports optional Epson tape drive;
controller on main system board
Supports up to two half-height drives;
embedded IDE controller; interface on main
system board
VGA adapter with 1MB DRAM (video
memory) built into main system board;
supports up to 800 x 600 or 1024 x 768
pixels in 16-colors or up to 640 x 480 pixels
in 256-colors; multi-frequency monitor
required for resolutions over 640 X 480
15-pin, D-shell connector
RS-232C, programmable, asynchronous;
9-pin, D-shell connector
Standard &bit parallel, mono-directional;
25-pin, D-shell connector
Mini DIN, 6-pin connector for PS/2
compatible mouse or other device
Mini DIN, 6-pin connector for PS/2
compatible keyboard
Six standard input/output expansion slots
(five 16-bit ISA compatible and one 8-bit
ISA compatible); 8 MHz bus speed
Internal; operation controllable by the Setup
program
200W, fan-cooled, automatic (worldwide)
input voltage sensing
98 to 132 VAC and 195 to 264 VAC
+5 VDC at 22 Amps, +12 VDC at
6.8 Amps
-12 VDC at .50 Amps, -5 VDC at
.50 Amps
Equity Series Computers 5/12/92
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
drive bay or one third-height and one full-height
drives
466DX2/50 & 486SX/25 PLUS-1

EQUITY 486DX2/50 PLUS
EQUITY 486SXi25 PLUS
Keyboard
Serial Port Connector (CN4)
Layout
Function
Detachable, two position, 101/102 (country-
dependent) sculpted keys
58-key QWERTY main keyboard;
17-key numeric/cursor pad; 10 cuxsor keys;
additional Pkey cursor pad; 16 function
keys (user-definable)
Four levels (normal, shift, control,
alternate); user-definable
Environmental Requirements
Serial Port Connector Pin Assignments
~
Altitude
Maximum
wet bulb
-330 to 9900 It -330to11660tt -330 to 39600 n
(-100 to 3000 m) (-100 to 3600 m) (-100 to 12000 m)
6FP F
104O F 134°F
(200 C) (400
Cl (5P C)
Physical Characteristics
Width 17 inches (432 mm)
Depth
16 inches MO6 mm)
Height
6 inches (153 mm)
Weight
Single diskette drive model:
(without
26 lb (11.8 kg)
keyboard)
Connector Pin Assignments
Parallel Port Connector (CN5)
Pin 13
Pin 1
g-1
Pin 25 Pin 14
Parallel Port Connector Pin Assignments
7 DATA5 16 INIT- 25 SIGNAL
GND
6 DATA6 17 SEECTIK
.9 DATA7 16 SIGNAL GND
Keyboard and Mouse Connector (CN2 and CN1)
Pin 6.
,Pin 5
w
Pin 44
& Pin 3
PinI*Pinl
Although the keyboard and mouse connectors are physically
identical, they cannot be used interchangeably.
Keyboard Connector Pin Assignments
Pin 1 signal
I
1 1 Kevboard Data
12 1 ReseNed
1
3 Ground
4+5
VDC
5
Keyboard Clock
6 Reserved
Mouse Connector Pin Assignments
Pin
1 signal
1 1 Mouse Data
12 1 Reserved
I
3
Ground
4
+BVDC (fused)
5 Mouse Clock
16 1 ReseNed
I
VGA Connector (CN3)
‘Ache Low Logic
486DX2l50 & 486Sx125 PLUS-2 5/12/92
Equity Series Computers

EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
VGA Connector Pin Assignments
Phi
Slgnal Pin SIgnsI
1 Red Video
4 Key
2 I Green Vrdeo
10
!
sync Return
3 1 Blue Vrdeo 11 1 1 Reserved
I
I/O Port Addresses (continued)
‘4
/ Unused
ii2 Reserved
5 / Ground
113 1 Honzontal sync
3
Red Return
14 Vertcal Sync
7 Green Return
15 ’ unused
6 Blue Return
DMA Channels
I Channel
Function
,O(CTRLl)
Spare
1 (CTRL 1)
SDLC
:P(CTRLl)
Floppy drsk dnve controller
~ 3 (CTRL 1)
Spare
4 (CTRL 2)
Cascade for CTRL 1
t
5 (CTRL 2)
I Soare
,6(CTRL2; 1
Spare
j 7 (CTRL 2)
1 Spare
Hardware Interrupts
I CTRLl
m
/ Functlan
IRQO
IRQl
IRCX?
IRQ3
IRQ4
1 IRQS
IRC6
IRQ7 IRQB
IR09
IRQlO
IRQll
IRQ12
IRQ13
IRQ14
i Timer Output 0
/ Keyboard
! Interrupt from Controller 2
senal port 2
Send port 1
Parallel port 2
Floppy drsk interrupt
Parallel potl 1
RTC Interrupt
Software redrrected to IRQ2
1 Reserved
j Reserved
Mouse, pomtmg dewce
Coprocessor
Hard dusk controller
/ IRQ15
1 Reserved
l/O Port Addresses
1 Addmo
/ Aulgned devh
1OW-OlF
1 DMA controller 1
I --
-.-..-
020 - 021 Interrupt controller
/
1
I
40 - 05F / Trmerlwunter
1060-06F 1
Kevboard 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
:*ddress
1 OF1
1 OF8 - OFF
Aeslgnsd device
: Reset math coprocessor
Math coorocessor
i 170- 176 1
Hard dtsk controller secondary
160-185
1BF’
lFO-ln
200 - 207
278 - 27F
i Contlguratlon regtsters
/ Conlrguratron register unlock port 1
I Hard disk controller primary
1 Game I/O
~ Printer port 2 (278 and 27F are unused)
1278
2F6 - 2FF
,300.31F
370 - 377
i Confrguratron regtster unlock port
1 Serial port 2
Prototype card
/
Floppy drsk dnve controller
secondary
I
! 378 - 37F
370
360-38F
Parallel printer port 1 (378 and 37F are unused)
i ConfIguratIon register unlock porl2
1SDLC. btsvnchronous wmmumcatron 2
3A0 - 3AF
1 Blsynchronous wmmumcatron 1
1
I
380 - 3BF
3D0 - 3DF
3F0 - 3R
1 Monochrome dtsplay and printer adapter
1 Color/graphtcs monltor adapter
/ Floppy disk drive controller primary
/ 3F8 - 3FF
1 Senal port 1
* These I/O address ports are wnllguratlon registers.
Jumper Settings
The illustration below shows the locations of the jumpers on the
main system board.
memory board
* 25 MHz system only
.
JP7
JP8
JP9
JPlO
JPll
JP12
JP13
JP14
JP15
Miscellaneous jumper settings
Jumper Jumper
number
! ssttlng
JP4
~ ;
1
/
JP5
it
JP6 A’
0
JP7 A’
I 0
I
JP15 j A
B
’ Factory settmg
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
1
your primary adapter
I
Enables the power-on password
Drsables the power-on password
Color monitor IS mstalled
Monochrome monitor IS mstalled
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
Enable the early input/output ready signal
I
Sets a normal mput/output ready slgnal
Equity Series Computers
5/12/92 4060)(2/50 & 486SW25 PLUS-3

EQUITY 486DX2/50 PLUS
EQUITY 486SW25 PLUS
Jumper settings for base memory
Base memory
Jumper JP13 Jumper JP14
640KB A~A’
512KB
,B
IA
,256KB
!B lB
/
* Factory setting
Jumper settings for extended memory
T&d
1 Jumper
memory
! JPB
$v
Jumper Jumper
JPlO
JPll
i Jumper
JP12 !
~4MB
B
0 B
i 6MB
0
A
BB
;B AA
1 9MB
A
!B IB
A
A
I 10MB
A
!A
0 A
,
IA
12MB
A
]B AA
(A
16MB
A
IA A
A
jA
* Factory setting
)oryer settings fir an altemate microprocessor
‘Jumper
number
’ Jumper
eelllng
Functlon
JPl IA
80487SX wwalled
B
80486SX wWalled
JP2
ii*
80467SX mslalled; NMI slgnal
80486SX installed NMI slgnal
1 JP3
iA
I
I
0’
1 60467SX mstallsd FERR stgnal
j 60466SX mstalled; FERR stgnal
* Factory settrig, these lumpers are not used for 60 MHz mtcroprocessor
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
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).
486DW50 & 466SW25 PLUS-4
5/l 2J92
SIMMconfigurations
Bank1 Bank2
Bank 3 Total memory
AMMM 1
,6MB
IMMMM iKKKK
QMB
II4 MM M KKKK
‘KKKK ’
I 10MB
(MMMM MMMM ~
! 12MB
/MMMM MMMM lMMMb.4
I16MB
K=266KB SIMM mtalled
M=l MB SIMM mstalled
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
I I
I lrtors I Pmmm I lJndhP I sa I Drirrnmnl
I
Tnmno. CvhJrr llrdr f&c)
(Wkobi) 1 mnm -(inHI) mmufrtwa
I1 306 4
17 128 I305 10
2615 417 300 615 20 Seagate ST225
and ST4026.
/
Watcm Dqnal WD-93042
3615 617
I 300 1615 30 Saapabz
ST1 38A *
14 1840
18 117
1512 IS40 Ifi? 1
28 j ¶6 15 I17 1488 877 140
I
Equity Series Computers

EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
Hard disk drive type (continued)
Sadorr Rcomp Landing stm Drnanarnd
Tvpono Cylindm Hmk (tic)
WRom) me (al MB) mmulactuar
36 -nserved-
37 a3 116 134
! mn 1682 ~ 202 Conner cP3204F
I38 548 18 138
Imn / 547 81 ~ canMrcP2048
I 39 761 18 39 rme
' I760 I 115 ! CannrCP30104
40 980 1 IO 17
I Malor7OmA
I
~~
1
,ToshbaMK-2024FC
I 41 1022 i5 34
I nori+ ~ 1022 I84 1 CDG942lblO6"
142 I 1022
18 ,I 1'
I Mne 1022 , 89 ( CDG942lblffi
,b3
1024
512 ' ~ Ion i M
~ M~~p0l1~1325.At~l3085, i
Lm%rLANEd.MaxtorXT1O85. (
,&bu,.,,,DR,,)8.j
now 1828
44 828 IO 34
~ 137 TorhbaMK-156F
45 1024 5 17 512
11023 142 1
46 615 8 17 128
j 618 40 /
47 - - --
j- -' 1 user dellred lype
* 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 %-bit interface
wilI override the embedded IDE port and disable it, freeimg
the standard base l/O address and lRQ(s).
Setup
-
When installing a hard disk drive, be sure to consult the
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.
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.
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.
-
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
Equity Series Computers
5/12/92 466DX2/50 & 486SX/25 PLUS-5