Flynn v1.9.7

Added

• Zoom box in window title bar per Apple HIG (zoomDocProc)
  • Click to toggle between user-sized window and standard 80x24 grid
  • Sets standard state to default terminal dimensions
  • Sends NAWS update to server on zoom while connected

Changed

• Scrollbar width from 16 to 15 pixels, matching Geomys UI dimensions
• Build system: renamed macplus preset to lite, full is now default
• README: added direct download links, auto-updated in release.sh

Fixed

• BUILD.md examples updated to reflect full as default preset
• BUILD.md: added apt-get install line for Debian/Ubuntu prerequisites

---

Downloads

Edition	Description	Memory
Flynn	Full build — 4 sessions, 192-line scrollback, all features including 256-color	~768KB
Flynn Lite	Recommended — 1 session, 96-line scrollback, most features	~384KB
Flynn Minimal	Bare-bones — 1 session, no scrollback, stripped features	~256KB

See BUILD.md for custom build options.

Flynn v1.9.6

Added

• Finger protocol client (RFC 1288) — File > Finger... (Cmd+F)
  • Query user information on remote hosts via TCP port 79
  • Host, username, and verbose (/W) fields in Finger dialog
  • Finger forwarding: user@host@gateway auto-splits and routes correctly
  • Remembers last finger host/username across launches
  • Status bar shows "finger | [user@]host"
  • Window title includes "(finger)" suffix
  • Per-bookmark protocol selection (Telnet or Finger) in bookmark editor
  • Favorites submenu dispatches finger bookmarks correctly
• Configurable build system with 16 compile-time feature flags
  • 3 build presets: minimal (~256KB), macplus/lite (~384KB), full (~768KB)
  • Every major feature can be toggled: --finger, --color, --glyphs,
    --cp437, --clipboard, --savefile, --bookmarks, --darkmode,
    --dblwidth, --altscreen, --offscreen, --statusbar,
    --cursorstyles, --tabstops
  • Configurable sessions (1-4) and scrollback lines (0-256)
  • SIZE resource (Finder memory partition) dynamically computed from
    enabled features
  • Presets applied first, individual flags override:
    --preset minimal --finger --bookmarks
  • Three-layer guard pattern: CMake source exclusion, header no-op stubs,
    inline #ifdef guards (~163 guard sites across 26 files)
  • FlynnPrefs struct unchanged for cross-build prefs compatibility
• Three release editions: Flynn (full), Flynn Lite (macplus), Flynn Minimal
• Build documentation: docs/BUILD.md with complete flag reference,
  memory costs, presets, and examples
• Direct offscreen memory writes bypass QuickDraw traps for rendering
  (font bitmap cache, direct glyph blit, direct erase/fill)
• Shadow buffer skips unchanged rows via memcmp
• Scroll sync uses memmove instead of CopyBits
• Color GWorld offscreen buffer eliminates flicker on System 7
• Optimized scrollbar arrow scrolling: ScrollRect + offscreen memmove
  renders only 1 row per arrow click instead of full 24-row redraw

Fixed

• Dark mode rendering bugs: white bar at window bottom, status bar
  artifacts, stale offscreen content
• Offscreen buffer reuse: clear pixel data when reusing for different
  window with same dimensions (prevented stale session content bleed)
• Scrollback ring buffer index: corrected formula for partially-filled
  buffers (was sb_head+sb_count+sb_row, now sb_head+sb_row)
• Drain loop data race: process pending TCP data before checking for
  disconnect state transition
• System 7 GWorld rendering stability and artifact fixes
• icl8/ics8 icon polarity for System 7 color displays
• 68000 address error in offscreen_fill_rect

Changed

• Default build uses macplus preset: 1 session, 96-line scrollback, ~384KB
  partition (was 4 sessions, 192-line scrollback, ~768KB)
• Binary size: 91KB minimal, 125KB default, 130KB full
• Release script builds all 3 presets and uploads 6 artifacts per release
• FlynnPrefs v12 (finger_host, finger_user, bookmark_protocol[])
• File menu: Finger... inserted at position 2, items renumbered
• Control menu disabled for finger sessions
• Bookmark edit dialog: protocol popup (Telnet/Finger), dialog enlarged
• Performance and security review: hardening, leak fixes, dead code
  removal, optimizations, and refactoring

---

Downloads

Edition	Description	Memory
Flynn	Full build — 4 sessions, 192-line scrollback, all features including 256-color	~768KB
Flynn Lite	Recommended — 1 session, 96-line scrollback, most features	~384KB
Flynn Minimal	Bare-bones — 1 session, no scrollback, stripped features	~256KB

See BUILD.md for custom build options.

Flynn v1.9.4

Fixed

• Option+Space (Ctrl-Space) not recognized: vkey_to_base table was 48
  entries, Space at vkey 0x31 (49) fell outside it. Extended table to
  include Space, enabling Ctrl-Space (0x00) for tmux prefix and similar
• Option+/ (Ctrl-/) not recognized: added '/' to vkey_to_base table
  with special case since '/' & 0x1F produces wrong value (0x0F instead
  of 0x1F)
• ANSI-BBS disconnect losing goodbye screen: telnet_init() zeroed the
  session's preferred_ttype before the snapshot restore check, so
  bookmark-specific ANSI-BBS sessions saw the global pref (e.g. xterm)
  and incorrectly restored the pre-clear snapshot. Now saves the
  session's terminal type before reset

Flynn v1.9.3

Added

• 13 new Unicode glyph mappings: flower/florette dingbats (U+273E-2741),
  snowflake (U+2744), sparkles (U+2728), flower emoji (🌸🌺🌼🌟💫),
  plus 2 new QuickDraw primitives (flower, snowflake)
• OSC 4 palette color query (rgb:RRRR/GGGG/BBBB replies from 256-color
  palette), OSC 10/11 default fg/bg color queries (dark_mode-aware),
  OSC 12/112 cursor color set/reset (no-op on monochrome XOR cursor)
• Hierarchical submenus: Options menu now uses Font and Terminal Type
  submenus (20 items → 5), fixing menu scrolling off-screen on Mac Plus.
  File menu uses Favorites submenu for bookmark entries
• Backspace mode toggle: DEL (0x7F) default for xterm/VT220, BS (0x08)
  for ANSI-BBS. Auto-switches when changing terminal type; manual override
  in Options menu ("Backspace Sends BS" checkmark)
• Send Ctrl-H and Send Ctrl-X items in Control menu
• Prefs v8→v9 migration for backspace_bs field

Fixed

• Dark mode shutter effect on monochrome: EraseRect (white) → draw →
  InvertRect caused visible white flash per row. Now renders directly
  with PaintRect (black bg) + srcBic/patBic (white drawing)
• BBS goodbye screen not displayed on disconnect: drain remaining TCP
  data before closing on TIME_WAIT; skip snapshot restore for ANSI-BBS
  terminal type to preserve goodbye screen
• DNS lookup failure after prefs migration: backspace_bs field was inserted
  before dns_server in the FlynnPrefs struct, shifting all subsequent fields
  by 1 byte. DNS server "1.1.1.1" became ".1.1.1" (invalid), and username
  lost its first character. Fixed validation to reject leading-dot IPs and
  reset dns_server in migration
• Backspace mode not auto-enabled when connecting with ANSI-BBS terminal
  type via bookmark or new session (only worked from Options menu)

Changed

• Bookmarks renamed to Favorites throughout UI (menus, dialogs, labels)
• Terminal Type menu reordered: xterm, xterm-256color, VT100, VT220,
  ANSI-BBS (display order decoupled from internal storage indices)
• Connection status window widened from 240→320px, hostname truncation
  40→50 chars to accommodate longer hostnames
• Performance: hot path optimizations in terminal parser and draw routines
• Security: bounds checking on terminal response buffer flush
• Dead code removal: ~50 lines removed, unused functions and defines cleaned up
• Defensive improvements: conn_send() rejects zero-length writes, removed
  unused idle_skip field from Connection struct

Flynn v1.9.2

Added

• CP437/ANSI-BBS terminal emulation for bulletin board systems
  • Full 256-entry CP437 lookup table mapping each byte to ASCII, Mac Roman,
    or QuickDraw glyph rendering
  • cp437_mode bypasses UTF-8 decoder for raw byte rendering, essential for
    BBS art using 0x80-0x9F range (C1 control code collision in UTF-8 mode)
  • ANSI-BBS terminal type in TTYPE negotiation, settings, preferences menu,
    and connect dialog — follows BBS community convention (ansi-bbs = CP437)
• True SGR attribute rendering
  • Italic (SGR 3) via TextFace(italic)
  • Strikethrough (SGR 9) via horizontal line at cell mid-height
  • Dim (SGR 2) halves foreground RGB on color systems
  • Blink (SGR 5/6) promotes background to bright colors (DOS-style)
• Bold-to-bright color promotion: SGR 1;30-37m promotes to bright colors
  (indices 8-15), matching standard ANSI/BBS behavior
• UTF-8 CP437 fallback for BBSes that send raw CP437 bytes despite
  xterm-256color TTYPE negotiation
• 57 new QuickDraw glyph primitives: double-line box drawing, mixed
  junctions, smileys, Greek/math symbols (160+ total primitives)
• 18 fractional block element glyphs (U+2581-U+258F, U+2594-U+2595)
• 60 sextant characters (U+1FB00-U+1FB3B) as 2x3 grid patterns
• DNS-over-TCP fallback for NAT environments
• Rendering diagnostic script (scripts/render-test.sh)

Fixed

• DNS resolution through NAT: Snow's DaynaPORT rewrites UDP source IPs,
  causing Flynn to reject valid DNS responses. Removed redundant source IP
  validation (txn_id match already authenticates responses)
• Backspace sends BS (0x08) instead of DEL (0x7F) for BBS compatibility
  (Linux telnetd accepts both; BBSes universally expect BS)
• Bytes 0xF8-0xFF silently dropped by UTF-8 parser — now route to CP437
• Legacy Computing chars (U+1FB00-U+1FBFF) produced double '??' instead
  of single '?' (they are single-width, not wide)

Changed

• Glyph count: 103 → 160+ QuickDraw primitives
• Dead code removal: 25 cases from boxdraw_to_dec() superseded by glyph
  tables, 3 cases from unicode_symbol_to_macroman(), dead block element
  fallback block (~50 lines, ~700 bytes recovered)
• Performance: eliminated double cell fetch in draw_row() (~80K cycles/redraw
  saved on 68000), replaced dark shade MULU with shift operation
• New source files: cp437.c, cp437.h

Flynn v1.9.0

Added

• 256-color support on System 7 with Color QuickDraw
  • Full 256-color palette: 16 ANSI colors + 216 color cube + 24 grayscale
  • Truecolor (24-bit) SGR sequences downgraded to nearest 256-color match
  • Palette Manager rendering via PmForeColor/PmBackColor for performance
  • Color windows with NewCWindow/NewPalette on System 7, standard NewWindow on System 6
  • Runtime detection via SysEnvirons() hasColorQD — zero impact on System 6
  • Per-cell foreground and background colors stored in CellColor arrays
  • ATTR_HAS_COLOR (bit 6) flag for fast skip of default-colored cells
  • Color-aware dark mode: swaps default fg/bg, skips InvertRect on color systems
  • New source files: color.c, color.h
  • Memory: +52KB per session on System 7 color, zero on System 6 monochrome
• 38 new QuickDraw primitive glyphs (103 total, up from 65):
  • Outline triangles: △ ▽ ▷ ◁ (U+25B3, U+25BD, U+25B7, U+25C1)
  • Small filled triangles: ▸ ◂ (U+25B8, U+25C2)
  • Diamonds: ◆ ◇ (U+25C6, U+25C7)
  • Half-circle variants: ◐ ◑ ◒ ◓ (U+25D0-U+25D3)
  • Fisheye circle: ◉ (U+25C9)
  • Six-pointed star: ✶ (U+2736)
  • Circled operators: ⊙ ⊕ ⊖ ⊗ (U+2299, U+2295-U+2297)
  • Superscript digits: ⁰¹²³⁴⁵⁶⁷⁸⁹ (U+2070, U+00B9, U+00B2, U+00B3, U+2074-U+2079)
  • Subscript digits: ₀₁₂₃₄₅₆₇₈₉ (U+2080-U+2089)
  • Superscripts/subscripts rendered at 60% font size with scaled positioning

Fixed

• Terminal type not saved between sessions — Connect dialog now persists
  the last-used terminal type (xterm, VT220, VT100, xterm-256color)
• Cursor XOR artifacts on color systems — arrow key editing on System 7
  caused stale inverse highlights because CSI cursor movement didn't mark
  rows dirty. Now tracks cursor position changes and marks affected rows
• Disconnect screen preservation — screen buffer snapshotted on full
  clear (ESC[2J) and restored on disconnect, instead of wiping to blank
• Session not cleaned up on bookmark connect failure — now properly
  destroys session if TCP connect fails after window was created
• Replaced all sprintf with snprintf across 15 call sites
  (defense-in-depth buffer overflow protection)
• Added bounds check to TTYPE/TSPEED subnegotiation buffer in telnet.c

Changed

• Glyph emoji base relocated from 0x60 to 0x80 to accommodate expanded
  primitive range (0x00-0x66)
• Lazy allocation of alt-screen and scrollback color arrays — deferred
  until first use, saving up to 38.5KB/session on System 7
• Screen snapshot moved from shared static to per-session Terminal struct
  for multi-session correctness; only triggers on full-screen clear
  instead of every data receive (~1.5ms/receive saved on 68000)
• Color default restore deferred to end of row instead of per-run,
  reducing redundant RGBForeColor/RGBBackColor traps by 10-15%
• Removed idle polling skip counter — eliminates 8.5ms average added
  latency on keystroke echo
• Single-session fast path in event loop — skips save/load state cycling
  when only one session is open
• Idle WaitNextEvent timeout reduced from 500ms to 167ms when disconnected
• SIZE resource increased from 640KB/512KB to 768KB/640KB for 4-session
  color headroom
• Removed ~450 lines of dead code: deleted dnr.c/dnr.h (superseded by
  dns.c), 14 unused functions, 4 unused defines, deduplicated
  ATTR_HAS_COLOR definition
• Build size: ~103KB (down from ~110KB after dead code removal)
• Memory per session: ~79KB System 6 mono, ~92KB System 7 color (initial),
  ~130KB fully loaded with alt screen and scrollback color

Flynn v1.8.1

Fixed

• Add icon family resources (icl4, icl8, ics#, ics4, ics8) for System 7
  Finder compatibility — custom Flynn icon now displays correctly instead
  of generic application icon

Flynn v1.8.0

Added

• System 7 improvements (all conditional, System 6 behavior unchanged):
  • MultiFinder suspend/resume: proper app4Evt handling, cursor blink stops
    when backgrounded, WaitNextEvent sleep increases to 60 ticks when suspended
  • Required Apple Events: kAEOpenApplication, kAEQuitApplication handlers
    for System 7 compliance (Finder can request clean quit)
  • StandardPutFile: modern System 7 save dialog for Save Contents, falls back
    to SFPutFile on System 6
  • Notification Manager: flashes Apple menu diamond when a session disconnects
    while Flynn is in the background
  • Machine type in About dialog: shows "Running on Macintosh Plus" (or SE,
    II, IIci, etc.) via Gestalt

Changed

• About dialog simplified per Apple HIG: condensed to app name/version,
  machine type, copyright, and GitHub link

Flynn v1.7.1

Added

• Save Contents... (Cmd+S): save terminal scrollback and screen buffer to a
  plain text file via SFPutFile dialog. Creates TEXT/ttxt files readable by
  TeachText. Default filename is the connection hostname.
• New savefile.c/savefile.h module for file save functionality

Changed

• File menu reorganized per Apple HIG:
  • "Save Contents..." (Cmd+S) in its own section
  • "Bookmarks..." (Cmd+B) leads the bookmark section
  • Recent bookmarks listed under Bookmarks
  • "Add Bookmark..." (renamed from "Save as Bookmark...") moved after recents
  • Separators between file operations, save, and bookmark management
• Cmd+S reassigned from "Save as Bookmark" to "Save Contents" (standard HIG
  convention for Cmd+S = save to file)
• "Add Bookmark..." is now a dynamic menu item, enabling proper bookmark
  section grouping with Bookmarks... as the section leader

Flynn v1.7.0

Changed

• Major codebase refactor: main.c reduced from 3,478 to ~494 lines (86% reduction)
• Extracted dialogs.c: all dialog handling (connect, bookmarks, about, disconnect)
• Extracted menus.c: menu management with per-menu dispatch handlers
• Extracted input.c: keyboard/mouse handling with data-driven key mapping tables
• Extracted clipboard.c: copy/paste/select all operations
• Extracted macutil.c: shared utilities (c2pstr, sprintfp, set_wtitlef, clear_window_bg)
• Extended session.c: font presets, ttype/font string helpers, window resize, init from prefs
• Collapsed identical telnet option handlers with fallthrough in telnet.c
• Extracted conn_resolve_host() from conn_connect() in connection.c
• Split handle_menu() into per-menu handlers (handle_file_menu, handle_edit_menu, etc.)
• Data-driven key mapping replaces if/else chain in handle_key_down()
• Total compiled LOC reduced from 12,027 to 10,036 (17% reduction)

Fixed

• Remote disconnect preserves terminal screen content (was wiped by terminal_reset)
• Window repaint after disconnect alert restores terminal content in all modes

Removed

• Dead conn_open_dialog() from connection.c
• 6 unused TCP wrapper functions from tcp.c (~256 lines)