IBM 5150/5160 - Some Expansion Cards and Options

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IBM Printer Adapter

This card provides one parallel port.

The port is hardwired to I/O base address 378, and interrupt 7.
Only one of these cards may be fitted in the 5150/5160, and can only be fitted if the computer doesn't already have a parallel port at I/O base address 378.

This card will co-exist with the parallel port in an 'IBM Monochrome Display and Printer Adapter' card (MDA). More info.

Click here to see IBM's technical document for the card.

Click on photo for larger view

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IBM Asynchronous Communications Adapter

This card provides one serial port, specifically a serial port of type RS-232.

The shunt block at the top-right corner controls whether the card is the 'primary adapter' or the 'alternate adapter'.
'Primary adapter' corresponds to I/O base address 3F8 and interrupt 4.
'Alternate adapter' corresponds to I/O base address 2F8 and interrupt 3.

Of those, what you would set depends on what existing serial ports exist in the computer.
If this card is the only serial port in the computer, then you would set this card to 'primary adapter'.
If the computer already has a serial port at I/O base address 3F8, and none at 2F8, then you would set this card to 'alternate adapter'.

Per IBM's technical document for the card, J13 needs to be jumpered if this card is fitted to slot 8 in a 5160.

Click here to see IBM's technical document for the card.

Click on photo for larger view

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IBM Game Control Adapter

This card provides one game port.
Only one of these cards may be fitted in the 5150/5160.

Click here to see IBM's technical document for the card.

Click on photo for larger view

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IBM 5.25" Diskette Drive Adapter

Only one of these cards may be fitted in the 5150/5160.

For 360K floppy drives.

Connecting a 1.2M floppy drive will not work (at 1.2M capacity) due to lack of High Density support on this card.

In an IBM 5150/5160, a 1.44M diskette drive connected to this card will not work at 1.44M capacity (due to lack of High Density support on the card), but will work with 720K diskettes. You can even boot from a 720K DOS boot diskette (IBM DOS 3.3 and IBM DOS 6.2 known to work).

Click here to see IBM's technical document for the card.
Click here to see an early version of the card.

Click on photo for larger view

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IBM 64/256KB Memory Expansion Option

This card provides up to 256 KB of conventional (base) RAM, via 4 banks of 64 KB.

Click here to see the layout of the 4 banks on the card.

RAM chips of type 4164 are used, of an access time rating of 200 ns (or less), and of the type where pin 1 is not used (Not Connected). 4164 examples.

It is your choice as to whether you fit 1, 2, 3 or 4 banks of RAM chips, however you need to adjust switches 5/6/7/8 on the card per:

Bank 0 only	: 5=on, 6=off, 7=off, 8=off
Banks 0/1	: 5=off, 6=on, 7=off, 8=off
Banks 0/1/2	: 5=off, 6=off, 7=on, 8=off
Banks 0/1/2/3	: 5=off, 6=off, 7=off, 8=on

Click on photo for larger view

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256KB Memory Expansion Option

This card provides up to 256 KB of conventional (base) RAM, via 4 modules, each module containing a bank of 64 KB.

It is your choice as to whether you fit 1, 2, 3 or 4 modules, however you need to adjust switches 5/6/7/8 on the card per:

Module 0 only	: 5=on, 6=off, 7=off, 8=off
Modules 0/1	: 5=off, 6=on, 7=off, 8=off
Modules 0/1/2	: 5=off, 6=off, 7=on, 8=off
Modules 0/1/2/3	: 5=off, 6=off, 7=off, 8=on

Switches 1/2/3/4 control the starting address of the RAM.
IBM's technical document for the card does not give examples of the setting of those switches. Click here to see the settings.

You can have multiple of these cards in your 5150/5160, providing that none of the RAM on a card has an address conflict with any other RAM (motherboard RAM or expansion card RAM).

Click here to see IBM's technical document for the card.

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Monochrome Display and Printer Adapter (MDA)

This card is designed to connect to IBM's 5151 monitor (MDA).

Connecting this card to a monitor that is not designed to accept MDA video/sync signals may damage the monitor.
The IBM 5153 monitor (CGA) and IBM 5154 monitor (EGA) are in that category (not designed for MDA signals).

When this card is fitted to an IBM 5150 computer (PC) or IBM 5160 computer (XT) as the only video card, the computer's motherboard switches (the 2 video card ones) must be set to: SW1-5 = OFF and SW1-6 = OFF

The included printer port is hardwired to I/O base address 3BC, and interrupt 7.

Click here to see IBM's technical document for the card.

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Color/Graphics Monitor Adapter (CGA)

This card is designed to connect to IBM's 5153 monitor (CGA), via the 9-pin D connector.
Alternatively, a composite monitor can be connected to this card via the RCA jack.

Connecting this card to a monitor that is not designed to accept CGA video/sync signals may damage the monitor.
The IBM 5151 monitor (MDA) is in that category (not designed for CGA signals).

The IBM 5154 monitor (EGA) will accept the CGA video/sync signals from this card.

When this card is fitted to an IBM 5150 computer (PC) or IBM 5160 computer (XT) as the only video card, the computer's motherboard switches (the 2 video card ones) are to be set as follows: SW1-5 = ON and SW1-6 = OFF
Those settings result in an 80 column by 25 row display (at CGA).
If a composite monitor is connected to this card (via the RCA jack), 80 columns may result in text that is difficult to read on that monitor. If that is the case, select the 40 column CGA mode by setting the computer's motherboard switches (the 2 video card ones) to: SW1-3 = OFF and SW1-4 = ON

Click here to see IBM's technical document for the card.

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Enhanced Graphics Adapter (EGA)

This card is primarily designed to connect to IBM's 5154 monitor (EGA), but if reconfigured via the red switch block, is capable of use with the IBM 5151 monitor (MDA) or the IBM 5153 monitor (CGA).

When this card is fitted to an IBM 5150 computer (PC) or IBM 5160 computer (XT) as the only video card, the computer's motherboard switches (the 2 video card ones) must be set to: SW1-5 = ON and SW1-6 = ON
Those same motherboard settings are used even if you reconfigure the card for MDA or CGA operation.

In the photo below, the optional daughter board (plugs into J5) that provides additional video RAM, is not shown.
Also, the switch positions shown on the red switch block suit an EGA monitor.

During the computer's Power On Self Test (POST), the IBM EGA card will perform its own self test (a crude/basic one). If the card finds a problem with itself, the card will cause the speaker to beep the error pattern of 1 long beep followed by 3 short beeps.

Click here to see IBM's technical document for the card.

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Personal Computer Keylock Option

For 5150, 5160, 5161, XT/370 and 3270 PC.

Clips over computer's power switch.
Can only be fitted/removed when the keylock switch is in the ON position.
The key can only be removed when the keylock switch is in the OFF position.

IBM part number 2683177

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