Scott Duensing
d68405550d
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>
90 lines
2.8 KiB
Makefile
90 lines
2.8 KiB
Makefile
# makefile - MSComm VBX control for MSVC 1.52
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#
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# Build: nmake
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# Clean: nmake clean
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#
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# Prerequisites:
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# - MSVC 1.52 (cl, link, rc in PATH)
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# - VBAPI.LIB (from VBX CDK, or generate with: implib vbapi.lib vbapi.def)
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#
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# High-speed serial note:
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# The stock Windows 3.1 COMM.DRV enables the 16550 FIFO for receive only,
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# with a trigger level of 14 (leaving only 2 bytes of headroom). This causes
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# overruns at baud rates above 9600 under load. For reliable operation at
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# 57600 or 115200, install CyberCom V1.1.0.0P -- a freeware drop-in
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# replacement included in ..\drivers\CYBERCOM.DRV. It enables both RX and TX
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# FIFOs with a trigger level of 8, dramatically reducing interrupt overhead.
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#
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# Install:
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# 1. Copy ..\drivers\CYBERCOM.DRV to \WINDOWS\SYSTEM
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# 2. Edit SYSTEM.INI [boot] section: comm.drv=cybercom.drv
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# 3. Add to [386Enh] section: COM1FIFO=1 (for each port in use)
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# 4. Restart Windows
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#
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# CyberCom is free for non-commercial use. (C) CyberSoft Corp 1993
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CC = cl
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LINK = link
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RC = rc
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# Compiler flags:
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# -c Compile only
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# -W3 Warning level 3
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# -ASw Small model, SS!=DS (Windows DLL)
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# -Gsw No stack probes, Windows prolog/epilog
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# -Ow Safe optimizations for Windows
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# -Zp2 Pack structures on 2-byte boundaries
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# -Ze Enable Microsoft extensions
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CFLAGS = -c -W3 -ASw -Gsw -Ow -Zp2 -Ze
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# Linker flags:
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# /NOD No default libraries
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# /NOE No extended dictionary search
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# /AL:16 Segment alignment 16
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LFLAGS = /NOD /NOE /AL:16
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# Libraries
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# sdllcew Small model DLL C runtime (emulated math, Windows)
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# libw Windows API import library
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# commdlg Common dialog import library
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# vbapi VB API import library
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LIBS = sdllcew libw commdlg vbapi
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# Output
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TARGET = mscomm.vbx
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# Objects
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OBJS = mscomm.obj serial.obj
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# -----------------------------------------------------------------------
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# Build rules
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# -----------------------------------------------------------------------
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all: $(TARGET)
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$(TARGET): $(OBJS) mscomm.def mscomm.res vbapi.lib
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$(LINK) $(LFLAGS) $(OBJS), $(TARGET),,$(LIBS), mscomm.def
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$(RC) mscomm.res $(TARGET)
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mscomm.obj: mscomm.c mscomm.h vbapi.h serial.h
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$(CC) $(CFLAGS) mscomm.c
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serial.obj: serial.c serial.h
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$(CC) $(CFLAGS) serial.c
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mscomm.res: mscomm.rc mscomm.h mscomm.bmp
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$(RC) -r mscomm.rc
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# -----------------------------------------------------------------------
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# Generate VBAPI.LIB from vbapi.def if not present
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# -----------------------------------------------------------------------
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vbapi.lib: vbapi.def
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implib vbapi.lib vbapi.def
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# -----------------------------------------------------------------------
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# Clean
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# -----------------------------------------------------------------------
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clean:
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-del *.obj
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-del *.res
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-del *.vbx
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-del *.map
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