Epson Equity 486DX2-50 PLUS Product Support Bulletin

Product Support Bulletin

Subject: Proper Method for Running Benchmark and Diagnostics Programs

EPSON

Date: 06/04/93
Page(s): 1 of 1

This bulletin describes the proper method for running any benchmark or diagnostics
programs. This applies to any computer system.

In most cases, the computer should be started using an MS-DOS boot diskette
that’s ‘clean’ ­The appropriate executable can then be run, either from diskette or hard drive.

There will be some exceptions to the above rule. In attempting to benchmark or
troubleshoot any add-on that requires a device driver (CD-ROM, local area network,

etc.), obviously the necessary device driver(s) must be loaded. Also, some

programs will require a minimum number of FILES or BUFFERS to be defined in
the CONFIG.SYS file. Such programs will usually display this requirement if they
are run without the necessary CONFIG.SYS file.

For the most consistent results, use the absolute minimal boot configuration that’s

allowed by the hardware being tested.

in other words, one with no CONFIG.SYS or AUTOEXEC.BAT files.

PSB No: S-0158
Originator: MWT

Product Support Bulletin

Subject: Equity Series SIMM Compatibility

EPSON

Date: 12/4/91
Page(s): 1 of 1

Due to the influx of third party SlMMs on the market, there are some that are not

compatible with Epson products. This bulletin is intended to be an aid in ensuring
that only compatible SlMMs are chosen for use in Epson’s Equity Series of
computers.

The SlMMs in question were SEIMENS, CUMULUS and KINGSTON. Installing these

SlMMs in Epson products may cause the following errors:

Parity Check 1
18FFFE 0000 202 Memory Address Error
164 System Options Not
1500 E000 201” DOS RAM Address Error

It was thought that the chips used in these SlMMs were of poor quality.

Epson Portland evaluated the SlMMs in question and found that this was not true.

The problem is caused by the SIMM circuit boards (ITE and TECAP circuit boards)

used to manufacture the SIMM modules. The dimensions of these boards are not
compatible with industry standard SIMM sockets. This may result in incomplete
contact between the SIMM assembly and it’s socket. This is caused by insufficient
size of the contact surfaces in these products. Also enlarged holes in the TECAP

product allow the component pin to pass entirely through the hole without making

contact.

Set

PSB No: S-0136
Originator: JAD

It is recommended that only SIMMS meeting industry standard contact surface

specifications be used in Epson Equity computer products.

Some recommended SlMMs that were tested and found Compatible are:

Toshiba

Matsushita
CDC Enterprises
Samsung

Aculogic

For more information contact Technical Support.