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tools/emul/shell: allow the growing of fsdev

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This commit is contained in:
Virgil Dupras 2019-06-03 08:42:08 -04:00
parent f511289a3a
commit ecbb77072e
1 changed files with 10 additions and 2 deletions
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12
tools/emul/shell/shell.c
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@ -26,6 +26,7 @@
*/
//#define DEBUG
#define MAX_FSDEV_SIZE 0x20000
// in sync with shell.asm
#define RAMSTART 0x4000
@ -37,7 +38,7 @@
static Z80Context cpu;
static uint8_t mem[0xffff] = {0};
static uint8_t fsdev[0x20000] = {0};
static uint8_t fsdev[MAX_FSDEV_SIZE] = {0};
static uint32_t fsdev_size = 0;
static uint32_t fsdev_ptr = 0;
static int running;
@ -58,7 +59,10 @@ static uint8_t io_read(int unused, uint16_t addr)
#endif
return fsdev[fsdev_ptr++];
} else {
fprintf(stderr, "Out of bounds FSDEV read at %d\n", fsdev_ptr);
// don't warn when ==, we're not out of bounds, just at the edge.
if (fsdev_ptr > fsdev_size) {
fprintf(stderr, "Out of bounds FSDEV read at %d\n", fsdev_ptr);
}
return 0;
}
} else if (addr == FS_SEEKL_PORT) {
@ -85,6 +89,10 @@ static void io_write(int unused, uint16_t addr, uint8_t val)
} else if (addr == FS_DATA_PORT) {
if (fsdev_ptr < fsdev_size) {
fsdev[fsdev_ptr++] = val;
} else if ((fsdev_ptr == fsdev_size) && (fsdev_ptr < MAX_FSDEV_SIZE)) {
// We're at the end of fsdev, grow it
fsdev[fsdev_ptr++] = val;
fsdev_size++;
} else {
fprintf(stderr, "Out of bounds FSDEV write at %d\n", fsdev_ptr);
}