Epson Equity 4 Dimensions

EPSON

AMERICA,

INC.

EPSON

Product Support Bulletin

Subject:

Common Questions and Answers for the Epson Equity 4SX/25, 4DX/33

and 4DX2/50 Computers

Date: 04/02/93

Page(s): 1 of 8

PSB No: S-0155

Originator: SLS

GENERAL

Q1.

What an? the Epson Equity 4SX/25, 4DX/33 and 4DX2/50 computers?

The Epson 4SX/25, 4DX/33 and 4DX2/50 represent Epson’s new family of

entry-level computer products. Along with an affordable price, the new

Equity 4 series offers Intel™ i486™ processing power and upgrade

solutions for a wide range of computing applications. In addition to the

performance that these systems offer, users will appreciate the

convenience of a small footprint, complete system integration and pre-

loaded software. Key features include:

Choice of Intel 486SX/25, 486DX/33 or 486DX2/50 processor

Built-in math coprocessor (40X/33 and 4DX2/50); math coprocessor

support in the 4SX/25 model

Intel OverDrive

Support (4SX/25 and 4DX/33)

Zero Insertion Force (ZIF) socket for easy processor upgrades

8KB internal cache (built-in CPU)

Small-footprint case incorporates

- four ISA 16-bit option slots

- two externally accessible drive bays and one internal drive bay

- built-in Super VGA video adapter

- built-in serial, bi-directional parallel, mouse and keyboard ports

- built-in floppy and IDE hard drive controller/interface

Choice of 120MB or 240MB hard disk drive

4MB of RAM; upgradeable to 32MB via SlMMs

PSB No: S-0155

Page: 2 of 8

Q1.

What an? the Epson Equity 4SX/25, 4DX/33 and 4DX2/50 computers?

(continued)

512KB video memory; upgradeable to 1MB providing True Color

support

Alternate VGA feature connector for additional graphics capabilities

System and video BIOS can be relocated in shadow RAM for

increased system performance

ROM based system SETUP

Password security

Virus warning abilities included in BIOS

Bundled with MS-DOS® 5.0*, Microsoft® Windows

3.1 and a mouse

(MS-DOS and Windows are pre-loaded on hard drive models)

MS-DOS 6.0 will be included when available

Q2. what is the target market for this computer?

The Epson Equity 4SX/25, 4DX/33 and 4DX2/50 computers are targeted

at the following markets.

Home office and small-business users seeking maximum performance

at today’s low prices.

Work at home users who need an efficient and cost-effective system

that’s compatible with all their business software.

Businesses in search of a low-cost network node that can handle

current and future applications.

Q3. What interfaces and controllers are integrated on the motherboard?

The Epson Equity 4SX/25, 4DX/33 and 4DX2/50 computers come

standard with a built-in IDE hard disk drive interface, a floppy disk drive

controller, a super VGA video adapter, two serial interfaces, a bi-

directional parallel interface, a PS/2 style mouse port and a PS/2 style

keyboard port all integrated on the main system board (motherboard).

Q4.

PSB No: S-0155

Page: 3 of 8

What levels of password security are provided with the Epson Equity

4SX/25, 4DX/33 and 4DX2/50 computers?

The Equity 4 series of computers offer two levels of password security to

insure that unauthorized users do not change the system’s SETUP

configuration or obtain access to the system.

- Password security to obtain system access

- Password security to access SETUP menus

CPU

Q5.

What microprocessors are being offered with the Epson Equity 4 series

computers?

The Epson Equity 4SX/25 comes standard with an Intel i486SX

microprocessor (CPU) running at 25MHz. The Epson 4DX/33 comes

standard with an Intel i486DX CPU running at 33MHz. The Epson Equity

4DX2/50 comes standard with an Intel DX2/50 CPU running at 50MHz.

Common features of the different microprocessors include backward

compatibility with the 8088, 8086, 80286, and 80386 CPUs and a built-in

8KB cache. For system flexibility, the built-in CPU cache can be disabled

via SETUP.

The i486DX and DX2/50 CPUs contains an on-chip numeric coprocessor

to increase the speed of floating point operations. This coprocessor is

backward compatible with the 387DX and 387SX math coprocessors and

complies to ANSI/IEEE standard 754-1985.

Q6.

What processor upgrades are available in the Epson Equity 4SX/25,

4DX,33 and 4DX2/50 computers?

The Epson Equity 4SX/25 computer can be upgraded by installing an Intel

i487SX or Intel Overdrive CPU in the processor socket. Both of these

CPUs improve system performance by adding a numeric coprocessor to

speed up floating point calculations. The Intel Overdrive CPU doubles

the processor’s internal speed to further increase system performance.

The Epson Equity 4DX/33 computer can be upgraded by installing an Intel

Overdrive CPU in the processor socket. Like the Intel Overdrive CPU for

the 4SX/25, the Intel Overdrive CPU for the 4DX/33 also doubles the

processor’s internal speed to further increase system performance.

Please note that the Equity 4SX/25, 4DX/33 and 4DX2/50 computers do

not support the Weitek math co-processor.

PSB No: S-0155

Page: 4 of 8

BIOS

Q7.

What B/OS comes with the Epson Equity 4SX/25, 4DX/33 and 4DX2/50

computers?

The Equity 4 series computers incorporate an AWARD BIOS that contains

both the system and video BIOS. The AWARD BIOS is contained in a

single EPROM device that is installed in a pluggable socket on the main

system board.

Q8.

How is SETUP accessed and what information is contained in Setup?

To access SETUP, press the “DEL” key after POST (Power On Self-Test)

completes the memory test but before the computer loads the operating

system. There are two pages of setup information.

STATUS PAGE

- System Date and Time

- Floppy Drive Type Selection A: B: (360K, 1.2M, 720K, 1.44M and None)

- Video Type (EGA/VGA, CGA40, CGA80 and Mono)

- Halt on Error selection

(All Errors, No Errors, Keyboard, Diskette or Diskette/Keyboard)

- Cache (Enable/Disable)

- Shadow (System, Video or System/Video)

- Security (Setup Access, System access or Disabled)

Boot Sequence (Drive A,C or C,A)

- Virus Warning (Enabled/Disabled)

- NumLock Boot Status (On/Off)

HDD Drive Type Selection C: D: (Type Number or User-Defined)

OPTIONS PAGE

ISA Command Delay (Normal/Extended)

ISA Wait State (Normal/Extended)

I/O Recovery Time (Enabled/Disabled)

Extended ALE (Enabled/Disabled)

Decouple Refresh (Enabled/Disabled)

COM 1 Select (Enabled/Disabled)

COM2 Select (Enabled/Disabled)

Parallel Port Address

(03BCH, 0378H, 0278H or Disabled)

IDE Select (Enabled/Disabled)

FDC Select (Enabled/Disabled)

256K/384K Relocation (Enabled/Disabled)

DRAM Timing (Fast/Normal)

Video Cacheable (Enabled/Disabled)

System Cacheable (Enabled/Disabled)

PSB No: S-0155

Page: 5 of 8

VIDEO

Q9.

What video adapter comes standard built-in) with the Epson Equity

4SX/25, 4DX/33 and 4DX2/50 computers?

The Equity 4 series computers utilize a Cirrus GD5422 VGA graphics

controller as its built-in video adapter. These computers include 512KB of

video memory which may be upgraded to a full 1MB of memory by

installing pluggable memory chips.

The Cirrus VGA graphics controller is 100% hardware and BIOS-

compatible with IBM® VGA display standards.

Q10. What type of RAM chips are used to upgrade the video memory to a full

1MB on the Equity 4SX/25, 4DX/33 and 4DX2/50 computers?

To increase the Epson Equity 4 series computer’s video memory requires

four pieces of a 256K x 4 bit, 70ns, 20-pin DRAM (Dual In-line Package)

chip. These chips install on the computer’s main logic board in sockets

M5, M6, M7 and M8.

To insure compatibility, we have tested the following DRAM chips and

confirmed that they operate properly when upgrading the video memory:

PSB No: S-0155

Page: 6 of 8

Q11. What video modes are supported by the Epson Equity 4SX/25, 4DX/33

and 4DX2/50 computers?

List below is a table that shows the Epson Equity 4 series computer’s

supported video modes and the memory requirements to obtain each

mode:

Note: An "*"

indicates a Hi-Color mode and an ‘**’ indicates True Color mode.

Q12. What software video drivers are provided with the Epson Equity 4SX/25,

4DX/33 and 4DX2/50 computers?

There are four diskettes included that feature video drivers for many popular

software programs and also include video utilities. The key drivers included are:

Framework II and III, Gem 3.x. Lotus 1-2-3 Rel. 2.x,3.0/Lotus Symphony Rel.

2.0, Ventura Publisher 2.x and 3.0, Windows 3.0 and 3.1, WordPerfect 5.0 & 5.1,

AutoShade v1.x, Autocad R9, R10 and R11, AutoCAD/386 R10, R11 and R12,

PCad 4.x, VersaCAD 386/2D, Microsoft Word 5.0, and Microsoft OS/2 2.0.

The VGA video utilities included are: CLMODE and SETRES. These utilities

are useful when customizing system settings such as video modes or refresh

rates.

PSB No: S-0155

Page: 7 of 8

MEMORY

Q13. What is the standard memory configuration and maximum amount of

system memory that can be used in the Epson Equity 4SX/25, 4DX/33

and 4DX2/50 computers?

The Epson Equity 4 series computers come standard with 4MB of system

memory. This memory is provided by a 4MB SIMM installed in SIMM

socket 0 on the main system board.

There is a total of two SIMM sockets on the main system board. These

sockets accept 1 MB, 4MB or 16MB SIMMs. Optional SlMMs may be

purchased to increase the computer’s memory up to a maximum of 32MB.

NOTE: The SlMMs used must be 70ns or faster, 36-bit, 72-pin, fast page

mode type.

Q14. What an? the valid system memory configurations for the Epson Equity

4SX/25, 4DX/33 and 4DX2/50 computers?

Listed in the table below shows all valid system memory configurations for

the Epson Equity 4 series computers:

SIMM 0

4MB

Total Memory

4MB*

4MB 4MB

4MB

1MB

5MB

1MB 4MB 5MB

4MB

4MB 8MB

16MB 16MB

16MB

1MB

17MB

1MB 16MB 17MB

16MB 4MB 20MB

4MB 16MB 20MB

16MB

32MB

Note “*’

= Factory default memory configuration

PSB No: S-0155

Page: 8 of 8

MASS

STORAGE

Q15.

What factory floppy and hard disk drive configurations are offered with the

Equity 4SX/25, 4DX/33 and 4DX2/50 computers?

The Epson Equity 4SX/25, 4DX/33 and 4DX2/50 computers are available

in three factory configurations. All three configurations come standard

with a 1.44MB floppy disk drive.

Listed below are the factory configurations:

3.5” 1.44MB floppy disk drive

3.5” 1.44MB floppy disk drive/120MB IDE hard disk drive

3.5” 1.44MB floppy disk drive/240MB IDE hard disk drive

PSB No.: S-0062I

Page: 1 of 18

EQUITY 386/33 PLUS

VER PART # ESC TYPE LOC REASON

031892 Y707590802 AMI 27C512 U29 INITIAL RELEASE

061892 201078300 AMI 27C512 U29 Rapid keystrokes on all areas of the

keyboard may cause a shift key

lock and/or keyboard lockup. In

some rare cases, improper

keyboard timing may cause

intermittent system boot failure.

See ECN No: EQ386/33+-001

(2/5/93).

EN EAVOR / EQUITY 4

VER PART # ESC TYPE LOC REASON

1.149A AWAR 27C010 U8 INITIAL RELEASE

EN EAVOR 486C

VER PART # ESC TYPE LOC REASON

053193 1017670 AMI 27C010 U8 INITIAL RELEASE

EL 486 UC

VER PART # ESC TYPE LOC REASON

1.01 451-7010-201 PHOENIX 27C010 U20 INITIAL RELEASE

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