

>>>>>>>>  TEST5046


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TARGET
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This is code to go into ROM U33 on an IBM 5150 (IBM PC) motherboard.
The IBM 5150 has special ROM requirements. See http://www.minuszerodegrees.net/5150/motherboard/5150_u33.htm


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REQUIRED
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1. A speaker attached to your IBM 5150 motherboard.

2. A way of putting the BIN file into a suitable ROM/EPROM/EEPROM.
   The IBM 5150 has special ROM requirements. See http://www.minuszerodegrees.net/5150/motherboard/5150_u33.htm


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BIN FILES
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Per http://www.minuszerodegrees.net/5150/motherboard/5150_u33.htm, if a suitable adapter is used, 16 KB and 32 KB sized ROM/EPROM's can be used on the IBM 5150 motherboard.
Because of that, included here are 16 KB and 32 KB versions of TEST5046_8KB_SIZED.BIN, being TEST5046_16KB_SIZED.BIN and TEST5046_32KB_SIZED.BIN

TEST5046_8KB_SIZED.BIN is for an MCM68766 EPROM, or a 2564 EPROM.
TEST5046_16KB_SIZED.BIN is for a 27C128 EPROM (in a suitable adapter).
TEST5046_32KB_SIZED.BIN is for a 27C256 EPROM (in a suitable adapter) or W27E257 EEPROM (in a suitable adapter).

Again, see http://www.minuszerodegrees.net/5150/motherboard/5150_u33.htm


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WHAT DOES THE CODE DO ?
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Sets up the 8253 and 8255 chips in a way that results in a continuous tone from the speaker.

The tone is about 900 Hz.


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WHAT YOU SHOULD OBSERVE
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A tone heard from the speaker, a tone that never ends.

A partial circuit diagram is in file: TEST5046 - Measurements.png





