IBM 4300
The IBM 4300 series of computers were mid-range systems, various models of which were sold from 1979 through 1992. The systems, developed in Germany, were compatible with the System/370 instruction set. They featured modest electrical and cooling requirements, and thus did not require a data center environment.
Each model number was available in various sub-models, such as the 4341 model 1 (or 4341-1) and 4341 model 2 (4341-2).
The 4331 and 4341 ran the DOS/VSE operating system with FBA DASD. I/O used virtual addresses, unlike the System/370 architecture.
4300 systems were also capable of running the VM and MVS operating systems.
The 4381-13 through 4381-24 (announced in 1987) were entry-level machines for the 370/XA architecture. They were positioned between the IBM 9370 and IBM 3090 in performance at the time of announcement.
The 4381-3, 4381-14, 4381-24 and 4381-92 were dual-CPU models. Other models included 1, 2, 11, 12, 13, 21, 22, 23, 90 and 91.
| Model | Announced | Withdrawn | Max Memory | Approximate Performance |
|---|---|---|---|---|
| 4331 | 1979 | 1981 | 8MB | 4 × 370/115 |
| 4341 | 1979 | 1986 | 16MB | 3.2 × 370/138 |
| 4361 | 1983 | 1987 | 12MB | 3 × 4331 |
| 4381 | 1983 | 1992 | 64MB | 9 × 4341 |