IBM RT PC Options Installation page 211

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RT PC 4-Port Asynchronous RS232C
Adapter 6-9
processor options
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RT PC Floating-Point
Accelerator 4-7
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RT PC Personal Computer AT
Coprocessor Option 4-5
static-sensitive devices, handling
switches
address switches 6-10
interrupt level switches 6-10
system unit covers,
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6150
X-8 Options Installation
3-5
installing 3 -14
removing 1-4
system unit covers,
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6151
installing 3-17
removing 1-10
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Numerics
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6150 system units diagram
6151 system unit diagram