The ISR still fills the ring buffer (mandatory for 115200 baud), but the
app now polls ReadComm directly via a PeekMessage loop instead of waiting
for WM_COMMNOTIFY. Blink uses GetTickCount instead of WM_TIMER. This
eliminates all Windows message overhead from the data path while keeping
the message loop alive for keyboard, paint, and scrollbar.
Removed from KPCOMM.PAS: NotifyWndProc, hidden notification window,
RegisterClass/CreateWindow, EnableCommNotification, SetCommEventMask,
DoCommEvent, Process*Notify methods, OnComm/CommEvent/RThreshold/
SThreshold properties, modem shadow state (CTS/DSR/CD).
Removed from KPANSI.PAS: WM_TIMER handler, SetTimer/KillTimer, replaced
with public TickBlink method using GetTickCount at 500ms intervals.
Removed from drv/isr.c: checkNotify function and its call from
isrDispatch. Removed from drv/commdrv.c: pfnPostMessage, all
rxNotifySent/txNotifySent edge-trigger bookkeeping, gutted
enableNotification to a no-op API-compat stub. Removed from
drv/commdrv.h: rxNotifySent/txNotifySent fields (shifts struct layout),
PostMessageProcT typedef, pfnPostMessage extern.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Scott Duensing
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