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/****************************************************************************
** **
** SysStart.c - Startet Exec MIT Betriebssystem **
** **
*****************************************************************************
** **
** Modification History **
** -------------------- **
** **
** 24-Feb-91 CHW Created this file from Start.S **
** 29-Jun-20 CHW Aufgeräumt, öffnet jetzt Screen damit's mit UAE läuft **
** **
****************************************************************************/
#include <proto/exec.h>
#include <exec/io.h>
#include <exec/memory.h>
#include <exec/execbase.h>
#include <proto/graphics.h>
#include <proto/intuition.h>
#include <graphics/gfxbase.h>
#include <hardware/custom.h>
#include <hardware/dmabits.h>
#include <hardware/intbits.h>
//#include <resources/cia.h>
#include <string.h> /* z.B. für __builtin_memcpy */
#include <dos.h>
#include <chlib.h>
char ident[] = "$VER: SysStart 5.0 by Christian A. Weber (" __DATE__ ")";
char CLI_Template[] = "CS=CHIPSIZE/N,FS=FASTSIZE/N,MOD/K,PRI/N";
char CLI_Help[] = "Usage: SysStart [CHIPSIZE kbytes] [FASTSIZE kbytes] [MOD name] [PRI pri]";
extern __regargs void Exit(LONG);
extern void RawPrintfFunc(char *, ...);
extern struct ExecBase *SysBase;
extern struct GfxBase *GfxBase;
extern BPTR StdErr; /* Standard Error output stream */
extern struct Custom far volatile custom;
extern void __asm __far InitExec(
register __d0 LONG, register __d1 LONG,
register __d2 LONG, register __d3 LONG,
register __a0 void *,register __a1 void *,
register __a2 void *,register __a3 void *);
struct
{
LONG *ChipSizePtr;
LONG *FastSizePtr;
char *ModName;
LONG *PriPtr;
} argv;
UBYTE *chipbase; /* Startadresse des CHIP-RAMs für Exec */
ULONG chipsize; /* Grösse des CHIP-RAMs für Exec */
UBYTE *fastbase; /* Startadresse des FAST-RAMs für Exec */
ULONG fastsize; /* Grösse des FAST-RAMs für Exec */
struct Screen *screen; /* Wir öffnen einen Customscreen um Picasso- oder UAE-Screenmodes abzuschalten */
UWORD dmaconsave, intenasave;
ULONG attnflags, vblankfreq, sysbplcon0;
BYTE oldtaskpri;
/***************************************************************************/
/* Alles freigeben, back to DOS */
__saveds void ExitRoutine(void)
{
int i;
custom.color[0] = 0x173; /* Grünlich */
RawPrintfFunc("SysStart: ExitRoutine()\r\n");
printf("done.\n");
WaitBlit();
//DisownBlitter();
custom.cop1lc = (ULONG)GfxBase->copinit; /* Bild wieder einschalten */
custom.dmacon = 0x7FFF;
custom.dmacon = dmaconsave | DMAF_SETCLR; /* Original dmacon zurückholen */
custom.intena = 0x7FFF;
custom.intena = intenasave | INTF_SETCLR; /* Dito mit intena */
for(i=0; i<8; ++i)
custom.spr[i].dataa = custom.spr[i].datab = 0;
RemakeDisplay();
SetTaskPri(SysBase->ThisTask, oldtaskpri);
if (screen)
{
CloseScreen(screen);
screen = NULL;
}
if (fastbase)
{
FreeMem(fastbase, fastsize);
fastbase = NULL;
}
if (chipbase)
{
FreeMem(chipbase, chipsize);
chipbase = NULL;
}
CloseIntLib();
CloseGfxLib();
Exit(RETURN_OK);
}
/***************************************************************************/
/* Hauptprogramm */
LONG Main(LONG arglen, char *argline)
{
char *module = "MainPrg";
LONG taskpri = 0;
OpenGfxLib();
OpenIntLib();
printf("\n%s\n", ident+6);
AllocMem(0x40000000,0); /* Flushlibs */
AllocMem(0x40000000,0);
if (argv.ChipSizePtr)
{
chipsize = *argv.ChipSizePtr << 10; /* KBytes to Bytes */
if(chipsize < 100000)
{
Puts("CHIP size must be > 100K, please try again!");
return RETURN_ERROR;
}
}
else
{
chipsize = (AvailMem(MEMF_CHIP|MEMF_LARGEST) - 30000) & ~0xff;
if(chipsize > 1000000)
chipsize = (3*chipsize)/4;
}
if (argv.FastSizePtr)
{
fastsize = *argv.FastSizePtr << 10;
}
else
{
fastsize = (AvailMem(MEMF_FAST|MEMF_LARGEST) - 50000) & ~0xff;
if(fastsize > 1000000)
fastsize = (3*fastsize)/4;
}
if (argv.ModName)
module = argv.ModName;
if (argv.PriPtr)
taskpri = *argv.PriPtr;
if (!(screen = OpenScreenTags(NULL, SA_Width,320, SA_Height,200, SA_Depth,1, SA_Type,CUSTOMSCREEN, TAG_DONE)))
{
Puts("Can't open screen!");
ExitRoutine();
}
if (chipbase = AllocMem(chipsize, MEMF_CHIP|MEMF_CLEAR))
{
printf("Chip RAM: $%08lx (%luK)\n", chipbase, chipsize >> 10);
if (fastbase = AllocMem(fastsize, MEMF_FAST|MEMF_CLEAR))
{
printf("Fast RAM: $%08lx (%luK)\n", fastbase, fastsize >> 10);
}
else
{
fastsize = 0;
Puts("Not enough FAST RAM available");
}
//OwnBlitter();
WaitBlit();
oldtaskpri = SetTaskPri(SysBase->ThisTask,taskpri);
/* System-Status für MyExec merken/retten etc. */
dmaconsave = custom.dmaconr; // &~DMAF_SPRITE;
intenasave = custom.intenar; // &~INTF_INTEN;
attnflags = SysBase->AttnFlags;
vblankfreq = SysBase->VBlankFrequency;
sysbplcon0 = GfxBase->system_bplcon0;
custom.color[0] = 0xF00; /* Bildschirm rot */
RawPrintfFunc("\n%s: Running %s ...\r\n", ident+6, module);
InitExec( attnflags, /* D0 */
sysbplcon0, /* D1 */
vblankfreq, /* D2 */
(LONG)module, /* D3 : MainPrg-Name */
chipbase, /* A0 : CHIP-Startadresse */
chipbase+chipsize, /* A1 : CHIP-Grösse */
fastbase, /* A2 : FAST-Startadresse */
fastbase+fastsize /* A3 : FAST-Endadresse */
);
ExitRoutine();
/* not reached */
}
else printf("Can't get %luK CHIP RAM!\n",chipsize/1024);
return RETURN_WARN;
}
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