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emul/8086: add BLK support

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This commit is contained in:
Virgil Dupras 2020-10-24 23:20:20 -04:00
parent de9103942d
commit 885e7db054
3 changed files with 48 additions and 5 deletions
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7
emul/8086/Makefile
View File

@ -7,11 +7,8 @@ BLKFS = $(CDIR)/blkfs
.PHONY: all
all: $(TARGETS)
forth: forth.c forth.bin $(OBJS)
$(CC) -DFBIN_PATH=\"`pwd`/forth.bin\" forth.c $(OBJS) -lncurses -o $@
emul.o: emul.c $(BLKFS)
$(CC) -DFBIN_PATH=\"`pwd`/forth.bin\" -DBLKFS_PATH=\"`pwd`/$(BLKFS)\" -c -o emul.o emul.c
forth: forth.c forth.bin $(OBJS) $(BLKFS)
$(CC) -DFBIN_PATH=\"`pwd`/forth.bin\" -DBLKFS_PATH=\"`pwd`/$(BLKFS)\" forth.c $(OBJS) -lncurses -o $@
forth.bin: xcomp.fs $(STAGE)
$(CDIR)/stage < xcomp.fs > $@

39
emul/8086/forth.c
View File

@ -9,12 +9,16 @@
#ifndef FBIN_PATH
#error FBIN_PATH needed
#endif
#ifndef BLKFS_PATH
#error BLKFS_PATH needed
#endif
extern uint8_t byteregtable[8];
extern union _bytewordregs_ regs;
extern INTHOOK INTHOOKS[0x100];
static FILE *fp;
static FILE *blkfp;
static int retcode = 0;
WINDOW *bw, *dw, *w;
@ -22,6 +26,8 @@ WINDOW *bw, *dw, *w;
INT 1: EMIT. AL = char to spit
INT 2: KEY. AL = char read
INT 3: AT-XY. AL = x, BL = y
INT 4: BLKREAD. AX = blkid, BX = dest addr
INT 5: BLKWRITE. AX = blkid, BX = src addr
*/
void int1() {
@ -46,12 +52,45 @@ void int3() {
wmove(w, regs.byteregs[regbl], regs.byteregs[regal]);
}
void int4() {
uint16_t blkid = getreg16(regax);
uint16_t dest = getreg16(regbx);
fseek(blkfp, blkid*1024, SEEK_SET);
for (int i=0; i<1024; i++) {
write86(dest+i, getc(blkfp));
}
}
void int5() {
uint16_t blkid = getreg16(regax);
uint16_t dest = getreg16(regbx);
fseek(blkfp, blkid*1024, SEEK_SET);
for (int i=0; i<1024; i++) {
putc(read86(dest+i), blkfp);
}
}
int main(int argc, char *argv[])
{
INTHOOKS[1] = int1;
INTHOOKS[2] = int2;
INTHOOKS[3] = int3;
INTHOOKS[4] = int4;
INTHOOKS[5] = int5;
reset86();
fprintf(stderr, "Using blkfs %s\n", BLKFS_PATH);
blkfp = fopen(BLKFS_PATH, "r+");
if (!blkfp) {
fprintf(stderr, "Can't open\n");
return 1;
}
fseek(blkfp, 0, SEEK_END);
if (ftell(blkfp) < 100 * 1024) {
fclose(blkfp);
fprintf(stderr, "emul/blkfs too small, something's wrong, aborting.\n");
return 1;
}
fseek(blkfp, 0, SEEK_SET);
// initialize memory
FILE *bfp = fopen(FBIN_PATH, "r");
if (!bfp) {

7
emul/8086/xcomp.fs
View File

@ -9,8 +9,15 @@ CODE (emit) AX POPx, 1 INT, ;CODE
CODE (key) 2 INT, AH 0 MOVri, AX PUSHx, ;CODE
: COLS 80 ; : LINES 25 ;
CODE AT-XY ( x y ) BX POPx, AX POPx, 3 INT, ;CODE
CODE _ BX POPx, AX POPx, 4 INT, ;CODE
: EFS@ BLK( _ ;
CODE _ BX POPx, AX POPx, 5 INT, ;CODE
: EFS! BLK( _ ;
380 LOAD ( xcomp core high )
(entry) _ ( Update LATEST ) PC ORG @ 8 + !
," BLK$ "
," ' EFS@ BLK@* ! "
," ' EFS! BLK!* ! "
EOT,
ORG @ 256 /MOD 2 PC! 2 PC!
H@ 256 /MOD 2 PC! 2 PC!