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mii_emu
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Removed dead code from mii.c 

Keyboard uses a FIFO for a while

Signed-off-by: Michel Pollet <buserror@gmail.com>
This commit is contained in:
Michel Pollet 2023-10-28 06:26:25 +01:00
parent 5d0abefadf
commit 2f2cf15576
1 changed files with 7 additions and 43 deletions
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50
src/mii.c
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@ -416,45 +416,19 @@ mii_access_keyboard(
switch (addr) {
case SWKBD:
if (!write) {
/* If fifo not empty, peek at the next key to process, it already
* has the 0x80 bit on -- otherwise, return 0 */
res = true;
#if 1
*byte = mii_bank_peek(main, SWKBD);
#else
if (mii_key_fifo_isempty(&mii->keys))
*byte = 0;
else
*byte = mii_key_fifo_read_at(&mii->keys, 0).key;
#endif
}
break;
case SWAKD:
case SWAKD: {
res = true;
#if 1
{
uint8_t r = mii_bank_peek(main, SWAKD);
if (!write)
*byte = r;
r &= 0x7f;
mii_bank_poke(main, SWAKD, r);
mii_bank_poke(main, SWKBD, r);
}
#else
// if (write) {
/* clear latch, and replace it immediately with the new key
* if there's one in the FIFO */
if (!mii_key_fifo_isempty(&mii->keys)) {
mii_key_t k = mii_key_fifo_read(&mii->keys);
mii_bank_poke(main, SWAKD, k.key);
} else
mii_bank_poke(main, SWAKD,
mii_bank_peek(main, SWAKD) & ~0x80);
// } else
uint8_t r = mii_bank_peek(main, SWAKD);
if (!write)
*byte = mii_bank_peek(main, SWAKD);
#endif
break;
*byte = r;
r &= 0x7f;
mii_bank_poke(main, SWAKD, r);
mii_bank_poke(main, SWKBD, r);
} break;
case 0xc061 ... 0xc063: // Push Button 0, 1, 2 (Apple Keys)
res = true;
if (!write)
@ -473,16 +447,6 @@ mii_keypress(
key |= 0x80;
mii_bank_poke(main, SWAKD, key);
mii_bank_poke(main, SWKBD, key);
#if 0
mii_key_t k = {
.key = key | 0x80,
};
if (!mii_key_fifo_isfull(&mii->keys))
mii_key_fifo_write(&mii->keys, k);
else {
printf("%s key fifo full\n", __func__);
}
#endif
}