Manufacturer: |
Victor Comptometer Corp., Business Machines Group |
Model Number: |
4900 |
Introduced: |
January, 1976 |
Serial Number: |
Two Units in Museum |
|
#1: 6025-944 [Exhibited Machine] |
|
#2: 5322-494 |
Date of Manufacture: |
#1: Early 1980 [Exhibited Machine] |
|
#2: 1978 |
Manufactured In: |
USA, Chicago, IL |
Original Price: |
$2,195 |
Weight: |
24 Pounds |
Size: |
12 3/8" Wide, 15 1/2" Deep, 6 5/8" High |
Power Requirement: |
115V AC, 50/60 Hz |
Display Technology: |
Dot Matrix (5x7 font) 7-Pin Impact Printer, 120CPS |
Logic Technology: |
First-Generation Rockwell PPS-4 Microprocessor Family |
Digits of Capacity: |
14 |
Decimal Modes: |
Fixed(0 to 9 behind decimal) & Floating (up to 13 behind decimal) |
Arithmetic Logic: |
Arithmetic |
Math Functions: |
Four Function, plus Percent & Square Root |
|
Advanced Math Functions accessed by [PR/F] key |
|
Trig and Inverse Trig |
|
ex, Base 10 & e Logarithm |
|
Reciprocal (1/x), π |
|
Date Calculation |
|
Other as-yet unidentified functions |
Constant: |
Automatic on all four functions |
Memories: |
Two basic memories, w/add & subtract function keys |
|
[=+] and [=-] keys to add/subtract products/quotients to/from memory |
Programmable: |
1720 Program Step Memory
|
|
Conditional Branching (+,-,<,>,=)
|
|
Subroutine Capability
|
|
Tagged and Direct Address Branching
|
|
Direct and Indirect Memory Addressing
|
|
Program List and Trace Functionality
|
Notes: |
Unusual [∩] key for setting roundoff digit position
|