MICRONICS MOTHERBOARD

80386-20 Weitek (09-00008)

This document is for the full-sized (13.8" x 12.025") 80386-20 Weitek

motherboard (p/n 09-00008-xx). It's identifying features are: an LED

between expansion slots 5 and 6; a proprietary memory card slot as the

seventh slot; a bank of eight switches between slot 1 and the keyboard

connector; four ROM sockets; 8-bit slots for #2 and #6; 16-bit slots

for #1, #3, #4, #5, and #8; and a socket for an 80387 math coprocessor

next to the CPU.

The bus speed for this motherboard is fixed at 10MHz. Peripherals which

do not support this higher bus speed may have difficulties running on this

20MHz motherboard.

+=============================+

+ +

+ MOTHERBOARD SWITCH SETTINGS +

+ +

+ * = Default setting +

+=============================+

1 Reserved *On

2 80387 Coprocessor installed On

80387 Coprocessor not installed *Off

3 Reserved *Off

4 Bios relocation enabled *On

Bios relocation disabled Off

5 Reserved *Off

6 Color video adapter *On

Monochrome video adapter Off

7 See Below ---

8 Reserved *Off

If the M100C, or M400C memory card is installed, then switch 7 is

defined as follows:

7 Cache Enabled On

Cache Disabled Off

If the M100, M200, or M300 memory card is installed, then switch 7 is

defined as follows:

7 Reserved *Off

+=============================+

+ +

+ MOTHERBOARD JUMPER SETTINGS +

+ +

+=============================+

J1 External 6-volt battery connector

Pin 1 - Battery Positive

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - Ground

J21 Keylock / Power LED

Pin 1 - Power LED signal

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - Keyboard lock signal

Pin 5 - Ground

J22 External speaker

Pin 1 - Speaker

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - +5 volts

W1 ROM size

Pin 1-2 128KB

Pin 2-3 256KB

W2 Reserved - Not installed

W3 Reserved - always installed

W4 80387 Operation Speed

Pin 1-2 Asynchronous operation for 80387

Pin 2-3 Synchronous operation for 80387

W6 80387 Operation Speed

Installed Asynchronous operation for 80387

Not installed Synchronous operation for 80387

W7 Turbo LED

Pin 1 - Signal

Pin 2 - Ground

W8 Reserved - always installed

W9 Reset switch

Pin 1 - Signal

Pin 2 - Ground

W11 Reserved - Not installed

W12 Reserved - Not installed

+==============+

+ +

+ MEMORY CARDS +

+ +

+==============+

M100 memory card:

=================

The M100 memory card can hold 1MB or 2MB. The first MB is usually soldered

on the board. This is the card that was most commonly used by CompuAdd.

NOTE: All of the memory on the M100 must be static column DRAM (as opposed

to page mode DRAM) in order for the 2M-08, or 4M-08 to operate.

There is a row of nine (9) jumper pins in the lower left corner of the

M100 memory card. They should be positioned as follows:

1MB Pin 2-3, Pin 4-5, Pin 7-8

2MB Pin 1-2, Pin 4-5, Pin 7-8

4MB Pin 1-2, Pin 4-5, Pin 7-8 (with 2M-08)

6MB Pin 1-2, Pin 4-5, Pin 7-8 (with 4M-08)

10MB Pin 1-2, Pin 4-5, Pin 7-8 (with 4M-08)

Recommended memory chips for the second MB

------------------------------------------

Hitachi HM51258P-8 256Kx1 static column DRAM

NMB AAA2800P-07 256Kx1 static column DRAM

NMB AAA2800P-08 256Kx1 static column DRAM

NMB AAA2801P-06 256Kx1 page mode DRAM (see note above)

M200 memory card:

=================

The M200 memory card can hold 4MB or 8MB using 1Mx1 DRAM. The top two rows

of chips make up bank 0, and the bottow two rows make up bank 1.

There is a set of five (5) two-pin jumpers in the lower left corner of the

M200 memory card. They should be set as follows:

W1 W2 W3 W4 W5

4MB ON ON OFF OFF OFF

8MB OFF ON OFF OFF OFF

12MB OFF OFF OFF OFF OFF (with 4M-08)

16MB OFF OFF OFF OFF OFF (with 4M-08)

Recommended memory chips

------------------------

Toshiba TC511000P-85 1Mx1 page mode DRAM

NEC D421000C-80 1Mx1 page mode DRAM

Samsung KM41C1000P-80 1Mx1 page mode DRAM

Motorola MCM511000P-85 1Mx1 page mode DRAM

Siemens HYB511000-85 1Mx1 page mode DRAM

Siemens HYB511000-70 1Mx1 page mode DRAM

Intel P21010-08 1Mx1 page mode DRAM

M300 memory card:

=================

The M300 memory card can hold 1MB, 2MB, or 6MB. Each of the first two MB

is made up of four (4) 256Kx1, and eight (8) 256Kx4 chips. The lower

four rows of chips hold 1Mx1 chips, and must be filled in completely. It

is not possible to partially fill the lower bank of memory.

There is a bank of eight (8) switches in the upper left corner of the

M300 memory card. They should be set as follows:

SW1.1 SW1.2 SW1.3 SW1.4 SW1.5 SW1.6 SW1.7 SW1.8

1MB OFF OFF OFF OFF ON ON OFF ON

2MB OFF OFF ON OFF ON ON OFF ON

6MB OFF ON ON OFF ON ON OFF ON

10MB ON ON ON OFF ON ON OFF ON (with 4M-08)

14MB ON ON ON OFF ON ON OFF ON (with 4M-08)

Recommended memory chips

------------------------

Hyundai HY53C256LS-80 256Kx1 page mode DRAM

NMB AAA2801P-07 256Kx1 page mode DRAM

NMB AAA2801P-08 256Kx1 page mode DRAM

Siemens HYB514256A-80 256Kx4 page mode DRAM

Samsung KM44C256AP-80 256Kx4 page mode DRAM

Toshiba TC511000P-85 1Mx1 page mode DRAM

NEC D421000C-80 1Mx1 page mode DRAM

Motorola MCM511000P-85 1Mx1 page mode DRAM

Siemens HYB511000-85 1Mx1 page mode DRAM

Siemens HYB511000-70 1Mx1 page mode DRAM

Intel P21010-08 1Mx1 page mode DRAM

M100C memory card:

==================

The M100C memory card can hold 1MB or 2MB. It has an Austek cache

controller in the lower left corner of the card. It accommodates either

the 2M-08, or the 4M-08.

NOTE: Static column DRAM (as opposed to page mode DRAM) is recommended when

using either the 2M-08, or the 4M-08.

There are two jumpers on the M100C memory card. W1 is in the upper left

corner, and W3 is in the lower left corner. They should be set as follows:

W1 W3

1MB Pin 1-2 ON

2MB Pin 2-3 ON

4MB Pin 2-3 ON (with 2M-08)

6MB Pin 2-3 ON (with 4M-08)

10MB Pin 2-3 ON (with 4M-08)

Recommended memory chips

------------------------

Hitachi HM51258P-8 256Kx1 static column DRAM

NMB AAA2800P-07 256Kx1 static column DRAM

NMB AAA2800P-08 256Kx1 static column DRAM

Panasonic MN41256A-08 256Kx1 page mode DRAM (see note above)

Sharp LH21256-08 256Kx1 page mode DRAM (see note above)

NMB AAA2801P-06 256Kx1 page mode DRAM (see note above)

NMB AAA2801P-08 256Kx1 page mode DRAM (see note above)

M400C memory card:

==================

The M400C memory card can hold 4MB or 8MB. It has an Austek cache

controller in the lower left corner. The M400C cannot accommodate either

of the memory expansion cards, as it has no connectors.

There are two jumpers on the M400C memory card. W1 is in the upper left

corner, and W3 is in the lower left corner. They should be set as follows:

W1 W3

4MB Pin 1-2 ON

8MB Pin 2-3 ON

Recommended memory chips

------------------------

NEC D421000C-80 1Mx1 page mode DRAM

Motorola MCM511000P-85 1Mx1 page mode DRAM

Siemens HYB511000-70 1Mx1 page mode DRAM

Siemens HYB511000-85 1Mx1 page mode DRAM

Intel P21010-08 1Mx1 page mode DRAM

Samsung KM41C1000P-80 1Mx1 page mode DRAM

2M-08 memory expansion board:

=============================

The 2M-08 provides an additional 2MB, and is compatible with the M100, and

M100C memory cards. It is not compatible with the M200, the M300, or the

M400C. The 2M-08 comes populated, and has no jumpers or switches to set.

4M-08 memory expansion board:

=============================

The 4M-08 provides an additional 4MB (expandable to 8MB) for the M100, M200,

M300, and M100C memory cards. It is not compatible with the M400C. There

is a bank of four (4) switches on the card. The settings differ for each

of the main memory boards.

Recommended memory chips

------------------------

Use the tables above for the 1Mx1 page mode DRAM chips used for the

appropriate main memory card.

With the M100:

--------------

S1 S2 S3 S4

6MB ON OFF OFF OFF

10MB ON OFF ON OFF

With the M200:

--------------

S1 S2 S3 S4

12MB OFF ON OFF OFF

16MB OFF ON ON OFF

With the M300:

--------------

S1 S2 S3 S4

10MB ON ON OFF OFF

14MB ON ON ON OFF

With the M100C:

---------------

S1 S2 S3 S4

6MB ON OFF OFF OFF

10MB ON OFF ON OFF