Reference manual for the Intel iSBC 220 SMD Disk Controller covering installation, programming, operation, and service information.
The Intel iSBC 220™ SMD Disk Controller is a single‑board controller that connects up to four SMD disk drives to an Intel Multibus™ system. It supports 8‑ or 16‑bit CPUs, 16‑ or 20‑bit addressing, and provides DMA, error detection, and automatic retry features.
The manual includes hardware specifications, board dimensions, power requirements, environmental limits, wiring diagrams, jumper settings, programming information, and service procedures such as diagnostics and component replacement.
| CPU Compatibility | Any Intel mainframe or Multibus‑compatible CPU |
|---|---|
| Bytes per Sector | 128, 256, 512, 1024 |
| Power Requirements | +5 V ±5 % @ 3.25 A max; -5 V ±5 % @ 0.75 A max |
| Physical Dimensions | Width 17.2 cm, Length 30.5 cm, Height 1.3 cm, Weight 0.54 kg |
It requires +5 V ±5 % at up to 3.25 A and -5 V ±5 % at up to 0.75 A.
Any Intel mainframe or Multibus‑compatible CPU, with either 8‑ or 16‑bit data bus and 16‑ or 20‑bit addressing.