78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
|
#include "helper.h"
|
||
|
|
|
||
|
|
uint16_t *nextLine(uint16_t *p) {
|
||
|
|
uintptr_t v = (uintptr_t)p;
|
||
|
|
return (uint16_t *)(v + (160 - ((v - 0xb8000) % 160)));
|
||
|
|
}
|
||
|
|
|
||
|
|
void V8086Int(uint8_t interrupt, union V86Regs_t *regs) {
|
||
|
|
// Edit the v8086 code with the interrupt
|
||
|
|
// Writing 4 bytes to ensure proper code
|
||
|
|
*(uint32_t*)v86Interrupt = 0x30CD00CD | (interrupt << 8);
|
||
|
|
FARPTR v86_entry = i386LinearToFp(v86Interrupt);
|
||
|
|
enter_v86(0x8000, 0xFF00, FP_SEG(v86_entry), FP_OFF(v86_entry), regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
void SetVideo25Lines() {
|
||
|
|
union V86Regs_t regs;
|
||
|
|
regs.w.ax = 0x1114; // 80x25 mode
|
||
|
|
regs.w.bx = 0x0000;
|
||
|
|
V8086Int(0x10, ®s);
|
||
|
|
}
|
||
|
|
void SetVideo50Lines() {
|
||
|
|
union V86Regs_t regs;
|
||
|
|
regs.w.ax = 0x1112; // 80x50 mode
|
||
|
|
regs.w.bx = 0x0000;
|
||
|
|
V8086Int(0x10, ®s);
|
||
|
|
}
|
||
|
|
void SetCursorDisabled() {
|
||
|
|
union V86Regs_t regs;
|
||
|
|
regs.w.ax = 0x0100; // set cursor
|
||
|
|
regs.w.cx = 0x3F00; // disabled
|
||
|
|
V8086Int(0x10, ®s);
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t OpenVol(VOLINFO *vi) {
|
||
|
|
uint8_t *diskReadBuf = (uint8_t *)0x20000;
|
||
|
|
uint8_t pactive, ptype;
|
||
|
|
uint32_t pstart, psize;
|
||
|
|
pstart = DFS_GetPtnStart(0, diskReadBuf, 0, &pactive, &ptype, &psize);
|
||
|
|
return DFS_GetVolInfo(0, diskReadBuf, pstart, vi);
|
||
|
|
}
|
||
|
|
uint32_t OpenDir(uint8_t *path, VOLINFO *vi, DIRINFO *di) {
|
||
|
|
uint8_t *diskReadBuf = (uint8_t *)0x20000;
|
||
|
|
di->scratch = diskReadBuf;
|
||
|
|
return DFS_OpenDir(vi, path, di);
|
||
|
|
}
|
||
|
|
|
||
|
|
void File83ToPath(char *src, char *path) {
|
||
|
|
uint8_t tmp, trailingSpace;
|
||
|
|
for (trailingSpace=0, tmp = 0; tmp < 8 && src[tmp]; tmp++) {
|
||
|
|
path[tmp] = src[tmp];
|
||
|
|
if (src[tmp] == ' ') trailingSpace++;
|
||
|
|
else trailingSpace = 0;
|
||
|
|
}
|
||
|
|
tmp -= trailingSpace;
|
||
|
|
path[tmp++] = '.';
|
||
|
|
for (int i = 8; i < 11 && src[i]; i++, tmp++) {
|
||
|
|
path[tmp] = src[i];
|
||
|
|
}
|
||
|
|
path[tmp] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void GetFileList(DIRENT *entries, int32_t *entCount, VOLINFO *vi, DIRINFO *di) {
|
||
|
|
uint8_t *diskReadBuf = (uint8_t *)0x20000;
|
||
|
|
DIRENT de;
|
||
|
|
int32_t fileCount = 0;
|
||
|
|
while (!DFS_GetNext(vi, di, &de)) {
|
||
|
|
if (de.name[0]) {
|
||
|
|
uint8_t *d = (uint8_t*)&entries[fileCount];
|
||
|
|
uint8_t *s = (uint8_t*)&de;
|
||
|
|
for (int i = 0; i < sizeof(DIRENT); i++)
|
||
|
|
d[i] = s[i];
|
||
|
|
fileCount++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*entCount = fileCount;
|
||
|
|
}
|