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ntvcm.cxx
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ntvcm.cxx
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// NT Virtual CP/M Machine
// This app runs CP/M 2.2 .com programs on Windows, MacOS, Linux, and DOS (real-mode 8086 using WATCOM compiler)
// Written by David Lee in late 2022
// Notes: -- Only the subset of CP/M 2.2 required to run the apps I tested is implemented.
// -- asm.com, load.com, and Turbo Pascal 1.00 & 3.01A are rested.
// -- Also tested with Wordstar Release 4 and mbasic.com BASIC-80 Ref 5.21.
// -- Also tested with Aztec C 1.06. compiler, assembler, linker, and generated apps work.
// -- Also tested with MBasic.
// -- Use tinst.com to configure Turbo Pascal 1.00 for vT100 and 3.01A for ANSI to get the screen to work.
// -- pip.com runs for simple file copies. Not tested for other modes, which probably fail.
// -- Tested with AlgolM, Janus ADA, CB80, Turbo Modula 2, Multiplan, Microsoft Fortran, MT Pascal, JRT Pascal, and more.
// -- Can be run in 8080 or Z80 modes (the latter is required for Turbo Pascal).
// -- Optionally detects if an ESC character is output, and switches to 80,24 mode.
// -- Uses x80.?xx for 8080 and Z80 emulation
// -- Not tested for other CP/M apps, which means they probably don't work. If they fail, it's probably
// not the CPU emulation (that's pretty well tested). It's probably the CP/M emulation in this file.
// To build on Windows debug and release:
// cl /nologo /openmp ntvcm.cxx x80.cxx /Oti2 /Ob2 /Qpar /Fa /EHac /Zi /DDEBUG /D_AMD64_ /link user32.lib ntdll.lib /OPT:REF
// cl /nologo /openmp ntvcm.cxx x80.cxx /Oti2 /Ob2 /Qpar /Fa /EHac /Zi /DNDEBUG /D_AMD64_ /link user32.lib ntdll.lib /OPT:REF
// To build on Linux debug and release:
// g++ -ggdb -Ofast -fopenmp -fno-builtin -D DEBUG -I . ntvcm.cxx x80.cxx -lssl -lcrypto -o ntvcm
// g++ -ggdb -Ofast -fopenmp -fno-builtin -D NDEBUG -I . ntvcm.cxx x80.cxx -lssl -lcrypto -o ntvcm
// To build on Windows with mingw64 & g++: (performance is >10% faster than the Microsoft compiler)
// g++ -Ofast -ggdb -fopenmp -D _MSC_VER ntvcm.cxx x80.cxx -I ../djl -D DEBUG -o ntvcm.exe -static -lwininet
// g++ -Ofast -ggdb -fopenmp -D _MSC_VER ntvcm.cxx x80.cxx -I ../djl -D NDEBUG -o ntvcm.exe -static -lwininet
// To build on Windows targeting DOS:
// I used Open Watcom C/C++ x86 16-bit Compile and Link Utility Version 2.0 beta Oct 9 2023 02:19:55 (64-bit)
// https://github.com/open-watcom/open-watcom-v2/releases/tag/Current-build
// wcl -q -zp=1 -ml -obmr -oh -ei -oi -s -0 -xs -j -oe=128 -ol+ -ot ntvcm.cxx x80.cxx -bcl=DOS -k8192 /I. /DWATCOM /DNDEBUG
// helpful: https://open-watcom.github.io/open-watcom-v2-wikidocs/clib.html
// Note: openmp, wininet, ssl, crypto, and djl_rssrdr.hxx are only required for RSS support.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vector>
#include <cstring>
#include <assert.h>
#include <ctype.h>
#include <sys/stat.h>
#include <djl_os.hxx>
#include <djltrace.hxx>
#include <djl_con.hxx>
#include <djl_cycle.hxx>
// On non-Windows platforms djl_rssrdr.hxx has a dependency on:
// httplib.h from https://github.com/yhirose/cpp-httplib
// openssl headers and libraries
#ifdef NTVCM_RSS_SUPPORT
#include <djl_rssrdr.hxx>
CRssFeed g_rssFeed;
#endif //NTVCM_RSS_SUPPORT
#include "x80.hxx"
#include "ntvcm.h" // get bdos extensions
// CP/M constants for memory addresses where OS-global state is stored
#define FCB_ARG1_OFFSET 0x5c
#define FCB_ARG2_OFFSET 0x6c
#define COMMAND_TAIL_LEN_OFFSET 0x80
#define COMMAND_TAIL_OFFSET 0x81
#define DEFAULT_DMA_OFFSET 0x80 // read arguments before doing I/O because it's the same address
// The BDOS invocation function that ships with M80 incorrectly assumes the BIOS_JUMP_TABLE low byte (minus 3) is 0.
// The BDOS_ENTRY address must be one byte beyond free memory for the app.
// So 260 bytes must be reserved: 256 for page-aligned BIOS and 4 bytes for the BDOS stub.
const uint8_t BDOS_ENTRY_LO = 0xfc;
const uint8_t BDOS_ENTRY_HI = 0xfe;
const uint16_t BDOS_ENTRY = ( ( BDOS_ENTRY_HI << 8 ) | BDOS_ENTRY_LO );
const uint8_t BIOS_JUMP_TABLE_LO = 0x00;
const uint8_t BIOS_JUMP_TABLE_HI = 0xff;
const uint16_t BIOS_JUMP_TABLE = ( ( BIOS_JUMP_TABLE_HI << 8 ) | BIOS_JUMP_TABLE_LO );
const uint16_t BIOS_FUNCTIONS = 0xff40; // 17 1-byte hooks
const uint16_t BIOS_FUNCTION_COUNT = 17;
const uint8_t DPB_OFFSET_LO = 0x60; // lo part of DPB
const uint8_t DPB_OFFSET_HI = 0xff; // where the Disk Parameter Block resides for BDOS 31.
const uint16_t DPB_OFFSET = ( ( DPB_OFFSET_HI << 8 ) | DPB_OFFSET_LO );
#define CPM_FILENAME_LEN ( 8 + 3 + 1 + 1 ) // name + type + dot + null
// cr = current record = ( file pointer % 16k ) / 128
// ex = current extent = ( file pointer % 512k ) / 16k
// s2 = extent high = ( file pointer / 512k )
struct FCB
{
uint8_t dr; // 00 0 = default drive, 1 = A ... 16 = P
uint8_t f[8]; // 01 file name. uppercase ascii or spaces
uint8_t t[3]; // 09 file type. uppercase ascii or spaces
uint8_t ex; // 12 extent 0..31 during I/O
uint8_t s1; // 13 reserved for CP/M
uint8_t s2; // 14 reserved for CP/M. extent high byte
uint8_t rc; // 15 record count for extent ex. 0..127
uint8_t dImage[16]; // 16 second half of directory entry OR rename new name
uint8_t cr; // 32 current record to read or write in sequential file operations
uint8_t r0; // 33 low byte of random I/O offset. Also for Compute File Size.
uint8_t r1; // 34 high byte of random I/O offset. Also for Compute File Size.
uint8_t r2; // 35 overflow of r0 and r1 (unused in CP/M 2.2)
// r0 and r1 are a 16-bit count of 128 byte records
uint16_t GetRandomIOOffset() { return ( (uint16_t) this->r1 << 8 ) | this->r0; }
void SetRandomIOOffset( uint16_t o )
{
this->r0 = ( 0xff & o );
this->r1 = ( ( o & 0xff00 ) >> 8 );
// unused in cp/m 2.2 this->r2 = 0;
} //SetRandomIOOffset
void SetRecordCount( FILE * fp )
{
// set rc to file size in 128 byte records if < 16k, else 128
uint32_t file_size = portable_filelen( fp );
if ( file_size >= ( 16 * 1024 ) ) // CP/M 2.2 does this and Whitesmith C's A80.COM and LNK.COM depend on it
this->rc = 128;
else
{
uint32_t tail_size = ( file_size % ( 16 * 1024 ) ); // won't matter because of 16k check above
this->rc = (uint8_t) ( tail_size / 128 );
if ( 0 != ( tail_size % 128 ) )
this->rc++;
}
} //SetRecordCount
void UpdateSequentialOffset( uint32_t offset )
{
cr = (uint8_t) ( ( offset % ( (uint32_t) 16 * 1024 ) ) / (uint32_t) 128 );
ex = (uint8_t) ( ( offset % ( (uint32_t) 512 * 1024 ) ) / ( (uint32_t) 16 * 1024 ) );
s2 = (uint8_t) ( offset / ( (uint32_t) 512 * 1024 ) );
#ifdef WATCOM
tracer.Trace( " new offset: %u, s2 %u, ex %u, cr %u\n", (uint16_t) offset, (uint16_t) s2, (uint16_t) ex, (uint16_t) cr );
#else
tracer.Trace( " new offset: %u, s2 %u, ex %u, cr %u\n", offset, s2, ex, cr );
#endif
} //UpdateSequentialOffset
uint32_t GetSequentialOffset()
{
uint32_t curr = (uint32_t) cr * 128;
curr += ( (uint32_t) ex * ( (uint32_t) 16 * 1024 ) );
curr += ( (uint32_t) s2 * ( (uint32_t) 512 * 1024 ) );
return curr;
} //GetSequentialOffset
void Trace( bool justArg = false ) // justArg is the first 16 bytes at app startup
{
tracer.Trace( " FCB at address %04x:\n", (uint32_t) ( (uint8_t * ) this - memory ) );
tracer.Trace( " drive: %#x == %c\n", dr, ( 0 == dr ) ? 'A' : 'A' + dr - 1 );
tracer.Trace( " filename: '%c%c%c%c%c%c%c%c'\n", 0x7f & f[0], 0x7f & f[1], 0x7f & f[2], 0x7f & f[3],
0x7f & f[4], 0x7f & f[5], 0x7f & f[6], 0x7f & f[7] );
tracer.Trace( " filetype: '%c%c%c'\n", 0x7f & t[0], 0x7f & t[1], 0x7f & t[2] );
tracer.Trace( " R S A: %d %d %d\n", 0 != ( 0x80 & t[0] ), 0 != ( 0x80 & t[1] ), 0 != ( 0x80 & t[2] ) );
tracer.Trace( " ex: %d\n", ex );
tracer.Trace( " s1: %u\n", s1 );
tracer.Trace( " s2: %u\n", s2 );
tracer.Trace( " rc: %u\n", rc );
if ( !justArg )
{
tracer.Trace( " cr: %u\n", cr );
tracer.Trace( " r0: %u\n", r0 );
tracer.Trace( " r1: %u\n", r1 );
tracer.Trace( " r2: %u\n", r2 );
}
} //Trace
};
// this struct is used to cache FILE * objects to avoid open/close for each file access
struct FileEntry
{
char acName[ CPM_FILENAME_LEN ];
FILE * fp;
};
struct CPMTime // non-standard time structure
{
uint16_t hour;
uint16_t minute;
uint16_t second;
uint16_t millisecond;
};
#pragma pack( push, 1 )
struct DiskParameterBlock // for BDOS 31. https://www.seasip.info/Cpm/format22.html
{
uint16_t spt; // Number of 128-byte records per track
uint8_t bsh; // Block shift. 3 => 1k, 4 => 2k, 5 => 4k....
uint8_t blm; // Block mask. 7 => 1k, 0Fh => 2k, 1Fh => 4k...
uint8_t exm; // Extent mask, see later
uint16_t dsm; // (no. of blocks on the disc)-1
uint16_t drm; // (no. of directory entries)-1
uint8_t al0; // Directory allocation bitmap, first byte
uint8_t al1; // Directory allocation bitmap, second byte
uint16_t cks; // Checksum vector size, 0 for a fixed disc
uint16_t off; // Offset, number of reserved tracks
};
#pragma pack(pop)
CDJLTrace tracer;
ConsoleConfiguration g_consoleConfig;
static bool g_haltExecuted = false;
static bool g_emulationEnded = false;
static bool g_exitCodeSet = false;
static uint16_t g_exitCode = 0;
static uint8_t * g_DMA = memory + DEFAULT_DMA_OFFSET;
static vector<FileEntry> g_fileEntries;
static bool g_forceConsole = false;
static bool g_forceLowercase = false;
static bool g_backspaceToDel = false;
static bool g_kayproToCP437 = false;
static size_t g_fileInputOffset = 0;
static vector<char> g_fileInputText;
static bool g_sleepOnKbdLoop = true;
enum terminal_escape { termVT100, termVT52, termKayproII };
static terminal_escape g_termEscape = termVT100;
void dump_memory( const char * pname = "ntvcm.dmp" )
{
FILE * fp = fopen( pname, "wb" );
if ( !fp )
{
printf( "can't create dump file, error %d = %s\n", errno, strerror( errno ) );
return;
}
for ( uint32_t i = 0; i < 65536; i += 128 ) // write in small blocks so it works on DOS too
fwrite( & memory[ i ], 1, 128, fp );
fclose( fp );
} //dump_memory
#ifdef WATCOM
#include <dos.h>
uint32_t DosTimeInMS()
{
struct dostime_t tNow;
_dos_gettime( &tNow );
uint32_t t = (uint32_t) tNow.hour * 60 * 60 * 100;
t += (uint32_t) tNow.minute * 60 * 100;
t += (uint32_t) tNow.second * 100;
t += (uint32_t) tNow.hsecond;
return t * 10;
} //DosTimeInMS
#endif //WATCOM
int ends_with( const char * str, const char * end )
{
size_t len = strlen( str );
size_t lenend = strlen( end );
if ( len < lenend )
return false;
return ( 0 == _stricmp( str + len - lenend, end ) );
} //ends_with
bool IsAFolder( const char * pc )
{
struct stat file_stat;
int result = stat( pc, &file_stat );
return ( ( 0 == result ) && ( 0 != ( S_IFDIR & file_stat.st_mode ) ) );
} //IsAFolder
bool ValidCPMFilename( char * pc )
{
if ( !strcmp( pc, "." ) )
return false;
if ( !strcmp( pc, ".." ) )
return false;
const char * pcinvalid = "<>,;:=?[]%|()/\\";
for ( size_t i = 0; i < strlen( pcinvalid ); i++ )
if ( strchr( pc, pcinvalid[i] ) )
return false;
size_t len = strlen( pc );
if ( len > 12 )
return false;
char * pcdot = strchr( pc, '.' );
if ( !pcdot && ( len > 8 ) )
return false;
if ( pcdot && ( ( pcdot - pc ) > 8 ) )
return false;
return true;
} //ValidCPMFilename
#ifdef _MSC_VER
static HANDLE g_hFindFirst = INVALID_HANDLE_VALUE;
void CloseFindFirst()
{
if ( INVALID_HANDLE_VALUE != g_hFindFirst )
{
FindClose( g_hFindFirst );
g_hFindFirst = INVALID_HANDLE_VALUE;
}
} //CloseFindFirst
#elif defined( WATCOM )
static bool g_FindActive = false;
static struct find_t g_FindFirst;
void CloseFindFirst()
{
if ( g_FindActive )
{
g_FindActive = false;
_dos_findclose( & g_FindFirst );
}
} //CloseFindFirst
#else
#include <dirent.h>
static DIR * g_FindFirst = 0;
struct LINUX_FIND_DATA
{
char cFileName[ MAX_PATH ];
};
void CloseFindFirst()
{
if ( 0 != g_FindFirst )
{
closedir( g_FindFirst );
g_FindFirst = 0;
}
} //CloseFindFirst
void ExtractFilename( const char * filename, char * name, char * ext )
{
bool pastdot = false;
const char * p = filename;
int extlen = 0;
int namelen = 0;
while ( *p )
{
if ( '.' == *p )
pastdot = true;
else
{
if ( pastdot )
ext[ extlen++ ] = *p;
else
name[ namelen++ ] = *p;
}
p++;
}
assert( namelen <= 8 );
assert( extlen <= 3 );
name[ namelen ] = 0;
ext[ extlen ] = 0;
} //ExtractFilename
bool IsCPMPatternMatch( const char * pattern, const char * name )
{
bool match = true;
int o_pattern = 0, o_name = 0;
while ( pattern[ o_pattern ] || name[ o_name ] )
{
char cp = pattern[ o_pattern ];
char cn = name[ o_name ];
if ( ( '?' != cp ) && ( cp != cn ) )
{
tracer.Trace( " not a pattern match at offsets %d / %d\n", o_pattern, o_name );
match = false;
break;
}
if ( cp )
o_pattern++;
if ( cn )
o_name++;
}
return match;
} //IsCPMPatternMatch
bool FindNextFileLinux( const char * pattern, DIR * pdir, LINUX_FIND_DATA & fd )
{
do
{
struct dirent * pent = readdir( pdir );
if ( 0 == pent )
return false;
// ignore files CP/M just wouldn't understand
if ( !ValidCPMFilename( pent->d_name ) || IsAFolder( pent->d_name ) )
continue;
tracer.Trace( " FindNextFileLinux is matching '%s' with '%s'\n", pattern, pent->d_name );
bool match = true;
if ( strcmp( pattern, "????????.???" ) )
{
// cp/m patterns contain '?' (match anything including nothing), ' ' (match nothing), or literal characters
char acName[ 9 ], acExt[ 4 ];
char acPatternName[ 9 ], acPatternExt[ 4 ];
ExtractFilename( pattern, acPatternName, acPatternExt );
ExtractFilename( pent->d_name, acName, acExt );
tracer.Trace( " extracted pattern name '%s' ext '%s', file name '%s', ext '%s'\n", acPatternName, acPatternExt, acName, acExt );
match = IsCPMPatternMatch( acPatternName, acName );
if ( match )
match = IsCPMPatternMatch( acPatternExt, acExt );
}
if ( !match )
continue;
strcpy( fd.cFileName, pent->d_name );
return true;
} while ( true );
return false;
} //FindNextFileLinux
DIR * FindFirstFileLinux( const char * pattern, LINUX_FIND_DATA & fd )
{
DIR * pdir = opendir( "." );
tracer.Trace( " opendir returned %p, errno %d = %s\n", pdir, errno, strerror( errno ) );
if ( 0 == pdir )
return 0;
bool found = FindNextFileLinux( pattern, pdir, fd );
if ( !found )
{
closedir( pdir );
return 0;
}
return pdir;
} //FindFirstFileLinux
#endif
void ParseFoundFile( char * pfile )
{
tracer.Trace( " ParseFoundFile '%s'\n", pfile );
memset( g_DMA, 0, 128 );
memset( g_DMA + 1, ' ', 11 );
size_t len = strlen( pfile );
assert( len <= 12 ); // 8.3 only
_strupr( pfile );
for ( size_t i = 0; i < len; i++ )
{
if ( '.' == pfile[ i ] )
{
for ( size_t e = 0; e < 3; e++ )
{
if ( 0 == pfile[ i + 1 + e ] )
break;
g_DMA[ 8 + e + 1 ] = pfile[ i + 1 + e ];
}
break;
}
g_DMA[ i + 1 ] = pfile[ i ];
}
tracer.Trace( " search for first/next found '%c%c%c%c%c%c%c%c%c%c%c'\n",
g_DMA[1], g_DMA[2], g_DMA[3], g_DMA[4], g_DMA[5], g_DMA[6], g_DMA[7], g_DMA[8],
g_DMA[9], g_DMA[10], g_DMA[11] );
} //ParseFoundFile
bool parse_FCB_Filename( FCB * pfcb, char * pcFilename )
{
char * orig = pcFilename;
// note: the high bits are used for file attributes. Mask them away
for ( int i = 0; i < 8; i++ )
{
if ( ' ' == ( 0x7f & pfcb->f[ i ] ) )
break;
*pcFilename++ = ( 0x7f & pfcb->f[ i ] );
}
if ( ' ' != pfcb->t[0] )
{
*pcFilename++ = '.';
for ( int i = 0; i < 3; i++ )
{
if ( ' ' == ( 0x7f & pfcb->t[ i ] ) )
break;
*pcFilename++ = ( 0x7f & pfcb->t[ i ] );
}
}
*pcFilename = 0;
// CP/M assumes all filenames are uppercase. Linux users generally use all lowercase filenames
if ( g_forceLowercase )
_strlwr( orig );
return ( pcFilename != orig );
} //parse_FCB_Filename
const char * low_address_names[] =
{
"warm boot",
"warm boot (bios) low",
"warm boot (bios) high",
"tty",
"default drive",
"bdos call",
"bdos low",
"bdos high",
};
void x80_hard_exit( const char * pcerror, uint8_t arg1, uint8_t arg2 )
{
//dump_memory( "ntvcm_hard_exit.dmp" );
g_consoleConfig.RestoreConsole( false );
tracer.Trace( pcerror, arg1, arg2 );
printf( pcerror, arg1, arg2 );
tracer.Trace( " %s\n", build_string() );
printf( " %s\n", build_string() );
exit( 1 );
} //x80_hard_exit
#pragma warning(disable: 4100)
void x80_invoke_out( uint8_t x)
{
} //x80_invoke_out
void x80_invoke_in( uint8_t x)
{
} //x80_invoke_in
void x80_invoke_halt()
{
tracer.Trace( "cpu_halt\n" );
g_haltExecuted = true;
g_emulationEnded = true;
} //x80_invoke_halt
FILE * RemoveFileEntry( char * name )
{
for ( size_t i = 0; i < g_fileEntries.size(); i++ )
{
if ( !strcmp( name, g_fileEntries[ i ].acName ) )
{
FILE * fp = g_fileEntries[ i ].fp;
tracer.Trace( " removing file entry '%s'\n", name );
g_fileEntries.erase( g_fileEntries.begin() + i );
return fp;
}
}
tracer.Trace( "ERROR: could not remove file entry for '%s'\n", name );
return 0;
} //RemoveFileEntry
FILE * FindFileEntry( char * name )
{
for ( size_t i = 0; i < g_fileEntries.size(); i++ )
{
if ( !strcmp( name, g_fileEntries[ i ].acName ) )
{
//tracer.Trace( " found file entry '%s': %p\n", name, g_fileEntries[ i ].fp );
tracer.Trace( " found file entry '%s'\n", name );
return g_fileEntries[ i ].fp;
}
}
tracer.Trace( " could not find an open file entry for '%s'; that might be OK\n", name );
return 0;
} //FindFileEntry
const char * bdos_functions[] =
{
"system reset",
"console input",
"console output",
"reader input",
"punch output",
"list output",
"direct console i/o",
"get i/o byte",
"set i/o byte",
"print string",
"read console buffer",
"get console status",
"return version number",
"reset disk system",
"select disk",
"open file",
"close file",
"search for first",
"search for next",
"delete file",
"read sequential",
"write sequential",
"make file",
"rename file",
"return login vector",
"return current disk",
"set dma address",
"get addr(alloc)",
"write protect disk",
"get read-only vector",
"set file attributes",
"get addr(disk parms)",
"get/set user code",
"read random",
"write random",
"compute file size",
"set random record",
"reset drive",
"write random with zero fill",
};
const char * get_bdos_function( uint8_t id )
{
if ( id < _countof( bdos_functions ) )
return bdos_functions[ id ];
if ( BDOS_GET_TIME == id )
return "get time";
if ( BDOS_SLEEP == id )
return "sleep";
if ( BDOS_INITIALIZE_RSS_FEED == id )
return "initialize rss feed";
if ( BDOS_FETCH_RSS_ITEM == id )
return "fetch rss item";
if ( BDOS_RAND == id )
return "rand";
if ( BDOS_ENABLE_INSTRUCTION_TRACING == id )
return "enable/disable instruction tracing";
if ( BDOS_GET_PUT_PROGRAM_RETURN_CODE == id )
return "get/put program return code";
if ( 45 == id )
return "non - cp/m 2.2: set action on hardware error";
return "unknown";
} //get_bdos_function
const char * get_bios_function( uint16_t id )
{
// the ids are shifted by 3 since I put code start at 0, not -3
id *= 3;
if ( 0 == id )
return "cold start";
if ( 3 == id )
return "warm boot (reload command processor)";
if ( 6 == id )
return "console status";
if ( 9 == id )
return "console input";
if ( 12 == id )
return "console output";
if ( 15 == id )
return "list: printer output";
if ( 18 == id )
return "punch: paper tape punch output";
if ( 21 == id )
return "reader: paper tape reader input";
if ( 24 == id )
return "home: move dic head to track 0";
if ( 27 == id )
return "seldsk: select disc drive";
if ( 30 == id )
return "settrk: set track number";
if ( 33 == id )
return "setsec: set sector number";
if ( 36 == id )
return "setdma: set dma address";
if ( 39 == id )
return "read: read a sector";
if ( 42 == id )
return "write: write a sector";
if ( 45 == id )
return "listst: status of list device";
if ( 48 == id )
return "sectran: sector translation for skewing";
return "unknown";
} //get_bios_function
char kaypro_to_cp437( uint8_t c )
{
#if defined( _MSC_VER ) || defined( WATCOM )
#pragma warning(disable: 4310)
// these are mostly box-drawing characters
if ( 0xb0 == c )
return (char) 0xcd;
if ( 0xd0 == c )
return (char) 0xc9;
if ( 0xd5 == c )
return (char) 0xba;
if ( 0xdf == c )
return (char) 0xbb;
if ( 0x85 == c )
return (char) 0xc8;
if ( 0x8c == c )
return (char) 0xcd;
if ( 0x8a == c )
return (char) 0xbc;
if ( 0xbc == c )
return (char) 0xdf;
if ( 0xbf == c )
return (char) 0xdb;
#else // for linux, use ascii-art
if ( 0xb0 == c || 0x8c == c )
return '-';
if ( 0xd0 == c || 0xdf == c || 0x85 == c || 0x8a == c )
return '+';
if ( 0xd5 == c )
return '|';
if ( 0xbc == c || 0xbf == c )
return '*';
#endif
if ( c >= 0x80 )
tracer.Trace( "untranslated kaypro high character %u == %02x\n", c, c );
return c;
} //kaypro_to_cp437
#ifdef WATCOM
void append( char * pc, size_t len, char c )
{
pc[ len ] = c;
pc[ len + 1 ] = 0;
} //append
void match_vt100( char * pc, size_t len )
{
static bool text_positive = true;
assert( 0x1b == pc[ 0 ] );
if ( len > 1 )
{
char last = pc[ len - 1 ];
if ( '[' == pc[ 1 ] )
{
if ( ( 'H' == last ) && ( strchr( pc, ';' ) ) ) // set cursor position
{
// rows and columns: vt-100 is 1-based, WATCOM library functions are 1-based. DOS is 0-based.
uint8_t row = atoi( pc + 2 );
char * pcol = strchr( pc, ';' ) + 1;
uint8_t col = atoi( pcol );
if ( 0 == row )
row = 1;
if ( 0 == col )
col = 1;
//tracer.Trace( " vt100: setting text position to %u, %u\n", row, col );
_settextposition( row, col );
}
else if ( 'm' == last ) // other display attributes
{
char * pnext = pc + 2;
while ( pnext && ( 'm' != *pnext ) )
{
uint8_t val = atoi( pnext );
if ( 0 == val ) // reset all attributes
{
//tracer.Trace( "vt100 reset text attributes\n" );
_settextcolor( 7 );
_setbkcolor( 0 );
text_positive = true;
}
else if ( 1 == val ) // bright / bold
{
//tracer.Trace( "vt100 text bright\n" );
grcolor tc = _gettextcolor();
if ( tc < 8 )
{
tc += 8;
_settextcolor( tc );
}
}
else if ( 2 == val ) // dim
{
//tracer.Trace( "vt100 text dim\n" );
grcolor tc = _gettextcolor();
if ( tc >= 8 )
{
tc -= 8;
_settextcolor( tc );
}
}
else if ( 3 == val || 23 == val ) // italic on/off
{
// no such feature
}
else if ( 4 == val || 24 == val ) // underline on/off
{
// no such feature
}
else if ( 5 == val || 25 == val ) // blink / unblink cursor
{
// yuck
}
else if ( 7 == val ) // reverse
{
//tracer.Trace( "vt100 text reverse\n" );
if ( text_positive )
{
long bk = _getbkcolor();
grcolor tc = _gettextcolor();
_settextcolor( bk );
_setbkcolor( tc );
text_positive = false;
//tracer.Trace( " reverse colors bk %u text %u\n", tc, bk );
}
}
else if ( 22 == val ) // turn off bold and dim/faint
{
//tracer.Trace( "vt100 normal text\n" );
grcolor tc = _gettextcolor();
_setbkcolor( 0 );
if ( tc >= 8 )
{
tc -= 8;
_setbkcolor( tc );
}
}
else if ( 27 == val ) // positive
{
//tracer.Trace( "vt100 text positive\n" );
if ( !text_positive )
{
long bk = _getbkcolor();
grcolor tc = _gettextcolor();
_settextcolor( bk );
_setbkcolor( tc );
text_positive = true;
//tracer.Trace( " positive colors bk %u text %u\n", tc, bk );
}
}
else if ( 31 == val ) // red
_settextcolor( 4 );
else if ( 32 == val ) // green
_settextcolor( 2 );
else if ( 33 == val ) // yellow
_settextcolor( 6 );
else if ( 34 == val ) // blue
_settextcolor( 1 );
else if ( 35 == val ) // magenta
_settextcolor( 5 );
else if ( 36 == val ) // cyan
_settextcolor( 3 );
else if ( 37 == val ) // white
_settextcolor( 7 );
else
tracer.Trace( " vt100 ignoring display attribute ^[%um\n", val );
pnext = strchr( pnext, ';' );
if ( pnext )
pnext++;
}
}
else if ( 'M' == last ) // delete n lines from the buffer at the current line (scroll up what's above)
{
short n = atoi( pc + 2 );
if ( n > 0 )
{
short x, y, dx, dy;
_gettextwindow( &x, &y, &dx, &dy );
//tracer.Trace( "original text window: %u %u %u %d\n", x, y, dx, dy );
struct rccoord pos = _gettextposition();
//tracer.Trace( "current row, col %u, %u\n", pos.row, pos.col );
//tracer.Trace( "deleting line by scrolling up %d rows at row %d\n", n, pos.row );
_settextwindow( pos.row, 1, 24, 80 ); // temporary view for the scroll
_scrolltextwindow( n );
_settextwindow( x, y, dx, dy ); // restore to the whole window
_settextposition( pos.row, pos.col ); // restore as the scroll moves this
}
}
else if ( !strcmp( pc + 1, "[H" ) ) // home cursor
{
//tracer.Trace( " vt100: home cursor\n" );
_settextposition( 1, 1 );
}
else if ( !strcmp( pc + 1, "[0K" ) || !strcmp( pc + 1, "[K" ) ) // clear line from cursor to right
{
struct rccoord pos = _gettextposition();
int to_clear = 81 - pos.col;
//tracer.Trace( " vt100: clear line from cursor to right, position %u, %u, to_clear %u\n", pos.row, pos.col, to_clear );
char ac[ 81 ];
memset( ac, ' ', to_clear );
ac[ to_clear ] = 0;
_outtext( ac );
_settextposition( pos.row, pos.col ); // restore the cursor position
}
else if ( !strcmp( pc + 1, "[2J" ) ) // erase screen and home cursor
{
//tracer.Trace( " vt100: erase and home cursor\n" );
_clearscreen( _GCLEARSCREEN );
_settextposition( 1, 1 );
}
else if ( !strcmp( pc + 1, "[J" ) ) // erase from current line down to bottom of screen
{
struct rccoord pos = _gettextposition();
short x, y, dx, dy;
_gettextwindow( &x, &y, &dx, &dy );
_settextwindow( pos.row, 1, 24, 80 ); // temporary view for the clear
_clearscreen( _GWINDOW );
_settextwindow( x, y, dx, dy ); // restore to the whole window
_settextposition( pos.row, pos.col ); // restore cursor position
}
else if ( 'L' == last ) // insert n lines at the current line (scroll down what's below)
{
short n = atoi( pc + 2 );
if ( n > 0 )
{
short x, y, dx, dy;
_gettextwindow( &x, &y, &dx, &dy );
struct rccoord pos = _gettextposition();
//tracer.Trace( "current row, col %u, %u\n", pos.row, pos.col );
//tracer.Trace( "inserting line by scrolling down %d rows at row %d\n", n, pos.row );
_settextwindow( pos.row, 1, 24, 80 ); // temporary view for the scroll
_scrolltextwindow( -n );
_settextwindow( x, y, dx, dy ); // restore to the whole window
_settextposition( pos.row, pos.col ); // restore as the scroll moves this
}
}
else if ( 'k' == last )
{
tracer.Trace( " vt100: unhandled K, full string '%s'\n", pc + 1 );
}
else if ( '?' == pc[ 2 ] && 'h' == last ) // cursor commands
{
uint8_t cmd = atoi( pc + 3 );
if ( 7 == cmd ) // enable text wrap mode
_wrapon( _GWRAPON );
else if ( 25 == cmd ) // show cursor
_settextcursor( 0x607 );
else
tracer.Trace( " vt100: unhandled h cursor command %u\n", cmd );
}
else if ( '?' == pc[ 2 ] && 'l' == last ) // cursor commands
{
uint8_t cmd = atoi( pc + 3 );
if ( 7 == cmd ) // reset text wrap mode
_wrapon( _GWRAPOFF );
else if ( 25 == cmd ) // hide cursor
_settextcursor( 0x2000 );
else
tracer.Trace( " vt100: unhandled l cursor command %u\n", cmd );
}
else if ( tolower( last ) >= 'a' && tolower( last ) <= 'z' )
{
tracer.Trace( " vt100: unhandled termination char %c, full string '%s'\n", last, pc + 1 );
_outtext( pc );
}
else
{
//tracer.Trace( " no vt100 match as of yet; waiting for more characters\n" );
return;
}
}
else if ( '<' == pc[ 1 ] ) // enter ANSI mode
{
// (already there)
}
else if ( 'A' == pc[ 1 ] ) // cursor up
{