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IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

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System Memory Map <br />

X'OOOOO'<br />

16 TO 64KB<br />

ON SYSTEM<br />

BOARD<br />

I/O CHANNEL<br />

ADDED MEM<br />

MAX 192KB<br />

384K MEMORY <br />

FUTURE <br />

EXPANSION<br />

265KB R/W MEMORY<br />

PRESENT<br />

SYSTEM<br />

MAX MEMORY<br />

FUTURE<br />

EXPANSION<br />

3/4 MEG<br />

MEMORY<br />

ADDRESS<br />

SPACE<br />

128KB<br />

128KB RESERVED<br />

GRAPHIC/DISPLAY<br />

BUFFER<br />

EXPANSION <br />

MEMORY <br />

216KB <br />

256KB ROM<br />

AD 0 R ESS<br />

SPACE<br />

X'FFFFF'<br />

40KB <br />

BASE SYSTEM <br />

ROM <br />

Figure 11. SYSTEM MEMORY MAP<br />

2-25

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