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Fixed handshaking in XT & Amstrad keyboards - no more stuck keys.

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This commit is contained in:
TomW 2014-01-03 16:16:23 +00:00
commit 61d987e4f2
2 changed files with 12 additions and 8 deletions
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10
src/keyboard_amstrad.c
View file

@ -22,6 +22,7 @@ struct
{
int wantirq;
uint8_t key_waiting;
uint8_t pa;
uint8_t pb;
} keyboard_amstrad;
@ -37,13 +38,14 @@ void keyboard_amstrad_poll()
if (keyboard_amstrad.wantirq)
{
keyboard_amstrad.wantirq = 0;
keyboard_amstrad.pa = keyboard_amstrad.key_waiting;
picint(2);
pclog("keyboard_amstrad : take IRQ\n");
}
if (key_queue_start != key_queue_end)
if (key_queue_start != key_queue_end && !keyboard_amstrad.pa)
{
keyboard_amstrad.pa = key_queue[key_queue_start];
pclog("Reading %02X from the key queue at %i\n", keyboard_amstrad.pa, key_queue_start);
keyboard_amstrad.key_waiting = key_queue[key_queue_start];
pclog("Reading %02X from the key queue at %i\n", keyboard_amstrad.key_waiting, key_queue_start);
key_queue_start = (key_queue_start + 1) & 0xf;
keyboard_amstrad.wantirq = 1;
}
@ -120,7 +122,7 @@ uint8_t keyboard_amstrad_read(uint16_t port, void *priv)
}
else
{
keyboard_amstrad.pa = key_queue[key_queue_start];
keyboard_amstrad.key_waiting = key_queue[key_queue_start];
key_queue_start = (key_queue_start + 1) & 0xf;
keyboard_amstrad.wantirq = 1;
}

10
src/keyboard_xt.c
View file

@ -20,6 +20,7 @@
struct
{
int wantirq;
uint8_t key_waiting;
uint8_t pa;
uint8_t pb;
@ -34,13 +35,14 @@ void keyboard_xt_poll()
if (keyboard_xt.wantirq)
{
keyboard_xt.wantirq = 0;
keyboard_xt.pa = keyboard_xt.key_waiting;
picint(2);
pclog("keyboard_xt : take IRQ\n");
}
if (key_queue_start != key_queue_end)
if (key_queue_start != key_queue_end && !keyboard_xt.pa)
{
keyboard_xt.pa = key_queue[key_queue_start];
pclog("Reading %02X from the key queue at %i\n", keyboard_xt.pa, key_queue_start);
keyboard_xt.key_waiting = key_queue[key_queue_start];
pclog("Reading %02X from the key queue at %i\n", keyboard_xt.key_waiting, key_queue_start);
key_queue_start = (key_queue_start + 1) & 0xf;
keyboard_xt.wantirq = 1;
}
@ -112,7 +114,7 @@ uint8_t keyboard_xt_read(uint16_t port, void *priv)
}
else
{
keyboard_xt.pa = key_queue[key_queue_start];
keyboard_xt.key_waiting = key_queue[key_queue_start];
key_queue_start = (key_queue_start + 1) & 0xf;
keyboard_xt.wantirq = 1;
}