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IBM 1130
The IBM 1130 Computing System, introduced in 1965, was IBM's least expensive computer at that time. A binary 16-bit machine, it was marketed to price-sensitive, computing-intensive technical markets, like education and engineering, succeeding the decimal IBM 1620 in that market segment. Typical installations included a 1 megabyte disk drive that stored the operating system, compilers and object programs, with program source generated and maintained on punched cards. Fortran was the most common programming language used, but several others, including APL, were available.
The 1130 was also used as an intelligent front-end for attaching an IBM 2250 Graphics Display Unit, or as remote job entry (RJE) workstation, connected to a System/360 mainframe.
The total production run of the 1130 has been estimated at 10,000. The 1130 holds a place in computing history because it (and its non-IBM clones) gave many people their first direct interaction with a computer. Its price-performance ratio was good and it notably included inexpensive, removable disk storage, with reliable, easy-to-use software that could be in several high-level languages. The low price (from around $32,000 or $41,000 with disk drive) and well-balanced feature set enabled interactive "open shop" program development.
The IBM 1130 uses the same electronics packaging, called Solid Logic Technology (SLT), that was used in System/360. It has a 16-bit binary architecture, as do later minicomputers like the PDP-11 and Data General Nova.
The address space is 15 bits, limiting the 1130 to 32,768 16-bit words (65,536 bytes) of memory. The 1130 uses magnetic-core memory, which the processor addresses on word boundaries, using direct, indirect, and indexed addressing modes.
IBM implemented five models of the 1131 Central Processing Unit, the primary processing component of the IBM 1130. The Model 1 through Model 5 describe the core memory cycle time, as well as the model's ability to have disk storage. A letter A through D appended to the model number indicates the amount of core memory installed.
IBM 1131 Central Processing Unit weighs about 760/1050 lb (345/477 kg).
The Model 4 was a lower-priced product with a 5.9 μs cycle time. Some purchasers of performance upgrades observed that the field adjustment to achieve the improvement was surprisingly trivial.
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IBM 1130
The IBM 1130 Computing System, introduced in 1965, was IBM's least expensive computer at that time. A binary 16-bit machine, it was marketed to price-sensitive, computing-intensive technical markets, like education and engineering, succeeding the decimal IBM 1620 in that market segment. Typical installations included a 1 megabyte disk drive that stored the operating system, compilers and object programs, with program source generated and maintained on punched cards. Fortran was the most common programming language used, but several others, including APL, were available.
The 1130 was also used as an intelligent front-end for attaching an IBM 2250 Graphics Display Unit, or as remote job entry (RJE) workstation, connected to a System/360 mainframe.
The total production run of the 1130 has been estimated at 10,000. The 1130 holds a place in computing history because it (and its non-IBM clones) gave many people their first direct interaction with a computer. Its price-performance ratio was good and it notably included inexpensive, removable disk storage, with reliable, easy-to-use software that could be in several high-level languages. The low price (from around $32,000 or $41,000 with disk drive) and well-balanced feature set enabled interactive "open shop" program development.
The IBM 1130 uses the same electronics packaging, called Solid Logic Technology (SLT), that was used in System/360. It has a 16-bit binary architecture, as do later minicomputers like the PDP-11 and Data General Nova.
The address space is 15 bits, limiting the 1130 to 32,768 16-bit words (65,536 bytes) of memory. The 1130 uses magnetic-core memory, which the processor addresses on word boundaries, using direct, indirect, and indexed addressing modes.
IBM implemented five models of the 1131 Central Processing Unit, the primary processing component of the IBM 1130. The Model 1 through Model 5 describe the core memory cycle time, as well as the model's ability to have disk storage. A letter A through D appended to the model number indicates the amount of core memory installed.
IBM 1131 Central Processing Unit weighs about 760/1050 lb (345/477 kg).
The Model 4 was a lower-priced product with a 5.9 μs cycle time. Some purchasers of performance upgrades observed that the field adjustment to achieve the improvement was surprisingly trivial.