Original PC Hardware Reference
Original PC Hardware Reference
Original PC Hardware Reference
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
CD: 12 <strong>Original</strong> <strong>PC</strong> <strong>Hardware</strong> <strong>Reference</strong><br />
Table 3 IBM <strong>PC</strong>/XT Motherboard Switch Settings<br />
Switch Block 1 (<strong>PC</strong> and XT)<br />
Switch 1 IBM <strong>PC</strong> Function (<strong>PC</strong> Only)<br />
Off Boot from Floppy Drives<br />
On Do Not Boot from Floppy Drives<br />
Switch 1 IBM XT Function (XT Only)<br />
Off Normal POST (power on self test)<br />
On Continuous Looping POST<br />
Switch 2 Math Coprocessor (<strong>PC</strong>/XT)<br />
Off Installed<br />
On Not Installed<br />
Switch 3 Switch 4 Installed Motherboard Memory (<strong>PC</strong>/XT)<br />
On On Bank 0 Only<br />
Off On Banks 0 and 1<br />
On Off Banks 0, 1, and 2<br />
Off Off All 4 Banks<br />
Switch 5 Switch 6 Video Adapter Type (<strong>PC</strong>/XT)<br />
Off Off Monochrome (MDA)<br />
Off On Color (CGA)—40×25 mode<br />
On Off Color (CGA)—80×25 mode<br />
On On Any Video Card with Onboard BIOS (EGA/VGA)<br />
Switch 7 Switch 8 Number of Floppy Drives (<strong>PC</strong>/XT)<br />
On On 1 floppy drive<br />
Off On 2 floppy drives<br />
On Off 3 floppy drives<br />
Off Off 4 floppy drives<br />
Table 4 Switch Block 2 (<strong>PC</strong> Only) Memory Settings<br />
Switch Number (Switch Block 2, <strong>PC</strong> Only)<br />
Memory 1 2 3 4 5 6 7 8<br />
16KB On On On On On Off Off Off<br />
32KB On On On On On Off Off Off<br />
48KB On On On On On Off Off Off<br />
64KB On On On On On Off Off Off<br />
96KB Off On On On On Off Off Off<br />
128KB On Off On On On Off Off Off<br />
160KB Off Off On On On Off Off Off<br />
192KB On On Off On On Off Off Off<br />
224KB Off On Off On On Off Off Off<br />
256KB On Off Off On On Off Off Off
Change language