Sweden-Number/msdos/devices.c

169 lines
4.5 KiB
C

/*
* DOS devices
*
* Copyright 1999 Ove Kåven
*/
#include <stdlib.h>
#include <string.h>
#include "wine/winbase16.h"
#include "msdos.h"
#include "miscemu.h"
#include "debug.h"
#include "pshpack1.h"
typedef struct {
DOS_DEVICE_HEADER hdr;
BYTE ljmp1;
RMCBPROC strategy;
BYTE ljmp2;
RMCBPROC interrupt;
} WINEDEV;
#include "poppack.h"
DOS_LISTOFLISTS * DOS_LOL;
DWORD DOS_LOLSeg;
#define NONEXT ((DWORD)-1)
#define ATTR_STDIN 0x0001
#define ATTR_STDOUT 0x0002
#define ATTR_NUL 0x0004
#define ATTR_CLOCK 0x0008
#define ATTR_FASTCON 0x0010
#define ATTR_REMOVABLE 0x0800
#define ATTR_NONIBM 0x2000 /* block devices */
#define ATTR_UNTILBUSY 0x2000 /* char devices */
#define ATTR_IOCTL 0x4000
#define ATTR_CHAR 0x8000
#define LJMP 0x9a
static void nul_strategy(CONTEXT*ctx)
{
}
static void nul_interrupt(CONTEXT*ctx)
{
}
static void con_strategy(CONTEXT*ctx)
{
}
static void con_interrupt(CONTEXT*ctx)
{
}
#define STRATEGY_OFS sizeof(DOS_DEVICE_HEADER)
#define INTERRUPT_OFS STRATEGY_OFS+5
static DOS_DEVICE_HEADER dev_nul_hdr={
NONEXT,
ATTR_CHAR|ATTR_NUL,
STRATEGY_OFS,INTERRUPT_OFS,
"NUL "
};
static WINEDEV devs={
{NONEXT,
ATTR_CHAR|ATTR_STDIN|ATTR_STDOUT|ATTR_FASTCON,
STRATEGY_OFS,INTERRUPT_OFS,
"CON "},
LJMP,con_strategy,
LJMP,con_interrupt
};
#define nr_devs (sizeof(devs)/sizeof(WINEDEV))
static void InitListOfLists()
{
/*
Output of DOS 6.22:
0133:0020 6A 13-33 01 CC 00 33 01 59 00 j.3...3.Y.
0133:0030 70 00 00 00 72 02 00 02-6D 00 33 01 00 00 2E 05 p...r...m.3.....
0133:0040 00 00 FC 04 00 00 03 08-92 21 11 E0 04 80 C6 0D .........!......
0133:0050 CC 0D 4E 55 4C 20 20 20-20 20 00 00 00 00 00 00 ..NUL ......
0133:0060 00 4B BA C1 06 14 00 00-00 03 01 00 04 70 CE FF .K...........p..
0133:0070 FF 00 00 00 00 00 00 00-00 01 00 00 0D 05 00 00 ................
0133:0080 00 FF FF 00 00 00 00 FE-00 00 F8 03 FF 9F 70 02 ..............p.
0133:0090 D0 44 C8 FD D4 44 C8 FD-D4 44 C8 FD D0 44 C8 FD .D...D...D...D..
0133:00A0 D0 44 C8 FD D0 44 .D...D
*/
DOS_LOL->CX_Int21_5e01 = 0x0;
DOS_LOL->LRU_count_FCB_cache = 0x0;
DOS_LOL->LRU_count_FCB_open = 0x0;
DOS_LOL->OEM_func_handler = -1; /* not available */
DOS_LOL->INT21_offset = 0x0;
DOS_LOL->sharing_retry_count = 3;
DOS_LOL->sharing_retry_delay = 1;
DOS_LOL->ptr_disk_buf = 0x0;
DOS_LOL->offs_unread_CON = 0x0;
DOS_LOL->seg_first_MCB = 0x0;
DOS_LOL->ptr_first_DPB = 0x0;
DOS_LOL->ptr_first_SysFileTable = 0x0;
DOS_LOL->ptr_clock_dev_hdr = 0x0;
DOS_LOL->ptr_CON_dev_hdr = 0x0;
DOS_LOL->max_byte_per_sec = 512;
DOS_LOL->ptr_disk_buf_info = 0x0;
DOS_LOL->ptr_array_CDS = 0x0;
DOS_LOL->ptr_sys_FCB = 0x0;
DOS_LOL->nr_protect_FCB = 0x0;
DOS_LOL->nr_block_dev = 0x0;
DOS_LOL->nr_avail_drive_letters = 26; /* A - Z */
DOS_LOL->nr_drives_JOINed = 0x0;
DOS_LOL->ptr_spec_prg_names = 0x0;
DOS_LOL->ptr_SETVER_prg_list = 0x0; /* no SETVER list */
DOS_LOL->DOS_HIGH_A20_func_offs = 0x0;
DOS_LOL->PSP_last_exec = 0x0;
DOS_LOL->BUFFERS_val = 99; /* maximum: 99 */
DOS_LOL->BUFFERS_nr_lookahead = 8; /* maximum: 8 */
DOS_LOL->boot_drive = 3; /* C: */
DOS_LOL->flag_DWORD_moves = 0x01; /* i386+ */
DOS_LOL->size_extended_mem = 0xf000; /* very high value */
}
void DOSDEV_InstallDOSDevices(void)
{
WINEDEV *dev;
DOS_DEVICE_HEADER *pdev;
UINT16 seg;
int n;
WORD ofs = sizeof(DOS_LISTOFLISTS)-sizeof(DOS_DEVICE_HEADER);
/* allocate DOS data segment or something */
DOS_LOLSeg = GlobalDOSAlloc16(ofs+sizeof(WINEDEV)+sizeof(devs));
seg = HIWORD(DOS_LOLSeg);
DOS_LOL = PTR_SEG_OFF_TO_LIN(LOWORD(DOS_LOLSeg), 0);
InitListOfLists();
/* copy first device (NUL) */
pdev = &(DOS_LOL->NUL_dev);
memcpy(pdev,&dev_nul_hdr,sizeof(DOS_DEVICE_HEADER));
pdev->strategy += ofs;
pdev->interrupt += ofs;
/* set up dev so we can copy over the rest */
dev = (WINEDEV*)(((char*)DOS_LOL)+ofs);
dev[0].ljmp1 = LJMP;
dev[0].strategy = (RMCBPROC)DPMI_AllocInternalRMCB(nul_strategy);
dev[0].ljmp2 = LJMP;
dev[0].interrupt = (RMCBPROC)DPMI_AllocInternalRMCB(nul_interrupt);
dev++;
ofs += sizeof(WINEDEV);
memcpy(dev,&devs,sizeof(devs));
for (n=0; n<nr_devs; n++) {
pdev->next_dev = PTR_SEG_OFF_TO_SEGPTR(seg, ofs);
dev[n].hdr.strategy += ofs;
dev[n].hdr.interrupt += ofs;
dev[n].strategy = (RMCBPROC)DPMI_AllocInternalRMCB(dev[n].strategy);
dev[n].interrupt = (RMCBPROC)DPMI_AllocInternalRMCB(dev[n].interrupt);
ofs += sizeof(WINEDEV);
pdev = &(dev[n].hdr);
}
}