IBM 1 Series - Customer Access Panel (CAP) Feature; General Purpose Interface Bus Adapter Feature

Teletypewriter Adapter Feature
The teletypewriter adapter feature card provides a way of attaching a
serial I/O device. This feature provides a logical subset of the Electronic
Industries Association (EIA) RS232-C interface. Full-duplex operation and
initial program load (IPL) are supported by the adapter.
Attachment to a teletypewriter is by a dc-current loop (isolated or
nonisolated). Two other attachment options are offered: a TTL-compatible
interface and an EIA voltage-level interface.
Integrated Digital Input/Output (I/O) Nonisolated Feature
The integrated digital I/O nonisolated feature card contains:
¢ Two 16-point groups of nonisolated digital input/process interrupt
(DI/PI)
« Two 16-point groups of nonisolated digital output (DO)
Each group of DI/PI and DO has a ‘ready’ and a ‘sync’ line for
synchronizing operations with attached devices. The digital points for each
group and their associated ‘ready’ and ‘sync’ lines are available at three
top-card connectors.
Customer Direct Program Control (DPC) Adapter Feature
The direct program control (DPC) adapter feature card supplies a logical
subset of the I/O channel architecture. This feature provides a convenient
means of attaching I/O devices and subsystems to an IBM Series/1
processor, The interface circuits are TTL compatible. The adapter is
designed to perform direct program control functions only. The feature
card can be configured to accommodate 4, 8, or 16 I/O device addresses.
The adapter allows for interrupt vectoring of 16 interrupt sources.
There are 75 signal lines. These include: 18 data bus out, 18 data bus in,
16 interrupt request in, three function bits, four modifier bits, four device
address bits, and 12 control and response lines. The data flow is always 16
bits without parity option or 18 bits with parity option (two parity bits).
User attachment is through three top-card connectors.
Customer Access Panel (CAP) Feature
The customer access panel (CAP) feature provides an assembly for
mounting optional, quick-disconnect-type connectors for I/O equipment.
The assembly can accommodate one timer connector, one teletypewriter
connector, and up to four connectors for either the integrated digital I/O
feature or the customer direct program control (DPC) feature.
The assembly mounts to the standard EIA RS310B rack-mounting screw
holes at the rear of the enclosure frame.
General Purpose Interface Bus Adapter Feature
The IBM Series/1 General Purpose Interface Bus (GPIB) Adapter, RPQ
D02118, provides a 65K-byte cycle-steal interface for attaching up to 14
digital I/O devices to an IBM Series/1 processor. The devices attached via
the GPIB adapter must conform to the requirements described in IEEE
Standard 488-1978.
Introduction 1-3