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<HTML>
<HEAD>
<!-- Created with AOLpress/2.0 -->
<TITLE>IBM 1620 Simulator Configuration</TITLE>
</HEAD>
<BODY>
<H1 ALIGN=Center>
IBM 1620 Simulator Configuration
</H1>
<P>
The IBM 1620 was introduced in 1960 as a small-scale scientific computer.
For many people, the 1620 was the first computer they ever used.
<P>
Photographs (courtesy of the Technology Museum of Thessaloniki):
<UL>
<LI>
<A HREF="photos/ibm1620.jpg">IBM 1620 Model 2</A>
</UL>
<P>
<TABLE BORDER="2" CELLPADDING="2">
<TR>
<TD><P ALIGN=Left>
<B>Option</B></TD>
<TD><P ALIGN=Left>
<B>Description</B></TD>
<TD><B>Capacity</B></TD>
</TR>
<TR>
<TD><P ALIGN=Left>
CPU and memory</TD>
<TD><P ALIGN=Left>
IBM 1620, Model 1 or Model 2</TD>
<TD>20K - 60K digits</TD>
</TR>
<TR>
<TD><P ALIGN=Left>
CPU special features </TD>
<TD><P ALIGN=Left>
indirect addressing </TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>edit instructions</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>automatic divide</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>modify address</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>Model 2 CPU features</TD>
<TD></TD>
</TR>
<TR>
<TD><P ALIGN=Left>
</TD>
<TD><P ALIGN=Left>
indexing</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>binary capability</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>floating point</TD>
<TD></TD>
</TR>
<TR>
<TD><P ALIGN=Left>
Console</TD>
<TD><P ALIGN=Left>
integrated typewritter</TD>
<TD></TD>
</TR>
<TR>
<TD>Paper tape</TD>
<TD>1621 paper tape reader</TD>
<TD></TD>
</TR>
<TR>
<TD></TD>
<TD>1624 paper tape punch</TD>
<TD></TD>
</TR>
<TR>
<TD><P ALIGN=Left>
Cards</TD>
<TD><P ALIGN=Left>
1622 card reader/punch</TD>
<TD></TD>
</TR>
<TR>
<TD><P ALIGN=Left>
Line printer</TD>
<TD><P ALIGN=Left>
1443 line printer</TD>
<TD></TD>
</TR>
<TR>
<TD>Disk</TD>
<TD>1311 disk pack, 4 drives</TD>
<TD>2M characters</TD>
</TR>
</TABLE>
<P ALIGN=Left>
<HR>
<P>
<I><SMALL>Updated 30-Jan-2007 by Bob Supnik (simh AT trailing-edge DOT com
- anti-spam encoded)</SMALL></I>
</BODY></HTML>