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

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

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Table 9. Functions and Conditions of DIP Switch 2<br />

Pin No. Function ON OFF Factory-set<br />

Condition<br />

1<br />

Not applicable - - ON<br />

2 - - ON<br />

3 AUTO FEED ~ Fixed internally Fixed Not fixed OFF<br />

XT signal Not fixed internally<br />

4 Coding table select N.A. Standard OFF<br />

Parallel Interface Description<br />

(1) Specifications<br />

(a) Data transfer rate: 1000 CPS (max.)<br />

(b) Synchronization: By externally supplied STROBE<br />

pulses.<br />

(c) Handshaking: ACKNLG or BUSY signals.<br />

(d) Logic level: Input data and all interface control signals<br />

are compatible with the TTL level.<br />

~ (2) Connector<br />

Plug: 57-30360 (AMPHENOL)<br />

(3) Connector pin assignment and descriptions of signals.<br />

Connector pin assignment and descriptions of respective<br />

interface signals are provided in Table (10) page 2-74.<br />

2-73

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