Remove BeginUpdate/EndUpdate batching from TKPAnsi entirely -- Write now
renders immediately via FlipToScreen after every ParseData call. Remove
FPendingScroll (caused rendering deadlock: EndUpdate refused to call
FlipToScreen while FPendingScroll > 0, but only FlipToScreen cleared it).
DoScrollUp simplified to set FAllDirty directly.
CommEvent drain loop retained (required by edge-triggered CN_RECEIVE) but
each chunk renders immediately -- no deferred batching. Edge-triggered
notifications verified starvation-free at all levels: ISR, driver, KPCOMM
dispatch, terminal rendering, and keyboard output path.
Add comprehensive variable comments to all project files: TKPAnsi (44
fields), TKPComm (23 fields), TMainForm (9 fields), PortStateT, and
driver globals.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Resolve GPFs in both USER.EXE and COMMTASK.DLL by correcting RETF
sizes for SETCOM and GETDCB, confirmed by disassembling CyberCom.DRV.
Add stock-compatible ComDEB structure so third-party code (ProComm
COMMTASK.DLL) can safely access internal fields at known offsets per
Microsoft KB Q101417.
COMM.DRV changes:
- SETCOM (ord 2): RETF 4, takes DCB FAR * only (not commId + DCB*)
- GETDCB (ord 15): RETF 2, takes commId, returns DCB FAR * in DX:AX
- Add 40-byte ComDebT matching stock COMM.DRV internal layout
(evtWord at +0, MSR shadow at +35, queue counts at +8/+18)
- cevt returns pointer to ComDebT for third-party compatibility
- Sync ComDEB fields in ISR dispatch, reccom, sndcom, cflush, setque
- Move WEP to ordinal 16, add ordinal 101 stub (match stock/CyberCom)
- Default DBG_ENABLED to 0 (set to 1 to re-enable debug logging)
VBX control fixes:
- Fix SETBREAK/CLRBREAK constants (use numeric 8/9, not undefined macros)
- Fix serialEnableNotify return type (BOOL, not int16_t)
- Fix mscomm.h to work with RC compiler (#ifndef RC_INVOKED)
- Fix vbapi.h USHORT typedef and MODEL.flWndStyle type
- Add vbapi.lib dependency to makefile
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
