Host Studio: 3270 & 5250

Host Studio is a high-performance, native 3270 and 5250 terminal emulator engineered for macOS, iOS, iPadOS, and Apple Vision Pro. Connect securely to IBM mainframes (z/OS, z/VM, z/VSE) and IBM i midrange systems (AS/400) with authentic CRT rendering, stream-to-native GUI transformation, IND$FILE dataset transfer, virtual SCS host printing, and enterprise MDM fleet management.

AUTHENTIC 3270 & TN5250E EMULATION

• TN3270 & TN3270E Engine: Full RFC 2355 negotiation, LU pooling, and Screen Models 2, 3, 4, and 5 (27×132).

• TN5250 & TN5250E Engine: Connect to IBM i (AS/400) via RFC 1205 & RFC 4777 with 24×80 and 27×132 displays, Workstation ID allocation, automated bypass sign-on, associated printer binding, System Request, and menus.

• EBCDIC Code Pages: Native mapping for CP037, CP273, CP280, CP284, CP285, CP297, CP500, CP870, CP871, CP930, CP1047, and more.

• CRT Theme Gallery: Green Phosphor, Amber Classic, Crisp Paper White, Cyberpunk, and High Contrast presets with scanlines, OIA status line, and 3279 colors.

STREAM-TO-NATIVE UI CONVERSION

• Instant GUI Mode: Switch between CRT terminal view and modern SwiftUI forms with a single tap.

• Subsystem-Aware Parsing: Automated detection for IBM CICS, z/OS TSO/ISPF, IBM IMS, and z/VSE.

• AS/400 Subfile Grids: Parses IBM i subfiles (WRKACTJOB, WRKSPLF) into interactive tables with option inputs and status indicators.

• Clean Labeled Forms: Strips filler dots and prompt leaders into clean inputs and structured key-value cards.

• Interactive Command Bar: Extends primary command and option prompts (Option ===>, TRANID) into an ergonomic command bar.

• Contextual Action Buttons: Automatically extracts screen PF/PA legends into native action buttons.

BIOMETRIC SECURITY & KEYCHAIN PROTECTION

• Face ID & Touch ID Session Locking: Protect sensitive host bookmarks behind biometric authentication before connecting.

• iCloud Keychain Credential Sync: Sync host credentials securely across your Apple devices via the encrypted Apple Keychain.

• Sanitized Bookmark Sharing: Safely export and share host bookmarks via AirDrop or JSON with credentials automatically stripped.

ENTERPRISE MDM & FLEET MANAGEMENT

• Managed App Configuration: Deploy pre-configured corporate bookmarks, enforce TLS encryption, and lock settings via Apple Business Manager and MDM (Jamf, Microsoft Intune, Workspace ONE).

• Data Loss Prevention (DLP): Restrict host dataset downloads and local file exports via centralized MDM policy.

5250 VIRTUAL SCS PRINTER & SPOOL WORKBENCH

• Real-Time Spool Capture: Emulate a 5250 companion printer (RFC 2877 / RFC 4777) to capture IBM i print jobs in real time.

• Vector PDF Generation: Converts SNA Character String spool data into crisp vector PDFs.

• Spool Job Management: Inspect, export, share, or print host reports wirelessly via AirPrint or macOS CUPS.

IND$FILE MAINFRAME DATASET TRANSFER

• Multi-System Support: High-speed transfers with TSO/E, VM/CMS, and CICS subsystems.

• Structured Field & CUT Modes: Full support for Outbound/Inbound Structured Fields and CUT transfers.

• Flexible Formats: Handles Fixed (F), Variable (V), and Undefined (U) records with configurable LRECL, BLKSIZE, and ASCII/EBCDIC/Binary modes.

APPLE ECOSYSTEM INTEGRATION

• Spotlight Search: Search host bookmarks in system Spotlight for instant launch.

• Siri Voice Shortcuts: Ask Siri to connect to saved host sessions hands-free.

• Tabletop & DuoPosture Console: Ergonomic split layout with tactile keypad and navigation D-pad.

• Barcode & Camera Scanner: Scan physical barcodes and QR codes directly into host input fields.

• Session Safeguards: Prevents accidental disconnects on quit (⌘Q) or window close during active sessions.

ZERO-NETWORK OFFLINE DEMOS

Test drive IBM 3270 and IBM i (AS/400) TN5250E emulation, Native UI conversion, themes, printer spools, and navigation immediately upon launch with built-in dual offline demo sessions.