# makefile - MSComm VBX control for MSVC 1.52
#
# Build: nmake
# Clean: nmake clean
#
# Prerequisites:
#   - MSVC 1.52 (cl, link, rc in PATH)
#   - VBAPI.LIB (from VBX CDK, or generate with: implib vbapi.lib vbapi.def)
#
# High-speed serial note:
#   The stock Windows 3.1 COMM.DRV enables the 16550 FIFO for receive only,
#   with a trigger level of 14 (leaving only 2 bytes of headroom). This causes
#   overruns at baud rates above 9600 under load. For reliable operation at
#   57600 or 115200, install CyberCom V1.1.0.0P -- a freeware drop-in
#   replacement included in ..\drivers\CYBERCOM.DRV. It enables both RX and TX
#   FIFOs with a trigger level of 8, dramatically reducing interrupt overhead.
#
#   Install:
#     1. Copy ..\drivers\CYBERCOM.DRV to \WINDOWS\SYSTEM
#     2. Edit SYSTEM.INI [boot] section: comm.drv=cybercom.drv
#     3. Add to [386Enh] section: COM1FIFO=1 (for each port in use)
#     4. Restart Windows
#
#   CyberCom is free for non-commercial use. (C) CyberSoft Corp 1993

CC      = cl
LINK    = link
RC      = rc

# Compiler flags:
#   -c      Compile only
#   -W3     Warning level 3
#   -ASw    Small model, SS!=DS (Windows DLL)
#   -Gsw    No stack probes, Windows prolog/epilog
#   -Ow     Safe optimizations for Windows
#   -Zp2    Pack structures on 2-byte boundaries
#   -Ze     Enable Microsoft extensions
CFLAGS  = -c -W3 -ASw -Gsw -Ow -Zp2 -Ze

# Linker flags:
#   /NOD    No default libraries
#   /NOE    No extended dictionary search
#   /AL:16  Segment alignment 16
LFLAGS  = /NOD /NOE /AL:16

# Libraries
#   sdllcew  Small model DLL C runtime (emulated math, Windows)
#   libw     Windows API import library
#   commdlg  Common dialog import library
#   vbapi    VB API import library
LIBS    = sdllcew libw commdlg vbapi

# Output
TARGET  = mscomm.vbx

# Objects
OBJS    = mscomm.obj serial.obj

# -----------------------------------------------------------------------
# Build rules
# -----------------------------------------------------------------------
all: $(TARGET)

$(TARGET): $(OBJS) mscomm.def mscomm.res vbapi.lib
	$(LINK) $(LFLAGS) $(OBJS), $(TARGET),,$(LIBS), mscomm.def
	$(RC) mscomm.res $(TARGET)

mscomm.obj: mscomm.c mscomm.h vbapi.h serial.h
	$(CC) $(CFLAGS) mscomm.c

serial.obj: serial.c serial.h
	$(CC) $(CFLAGS) serial.c

mscomm.res: mscomm.rc mscomm.h mscomm.bmp
	$(RC) -r mscomm.rc

# -----------------------------------------------------------------------
# Generate VBAPI.LIB from vbapi.def if not present
# -----------------------------------------------------------------------
vbapi.lib: vbapi.def
	implib vbapi.lib vbapi.def

# -----------------------------------------------------------------------
# Clean
# -----------------------------------------------------------------------
clean:
	-del *.obj
	-del *.res
	-del *.vbx
	-del *.map