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Some PIA character handling logic cleanup

This commit is contained in:
Daniel Loffgren 2018-12-29 12:14:49 -08:00
parent 25ea3d4d01
commit b11e9b89a3
1 changed files with 19 additions and 18 deletions
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37
src/pia.c
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@ -131,15 +131,21 @@ uint8_t keyboardReadReadyCallback(struct _v6502_memory *memory, uint16_t offset,
return 0xbf;
}
// Already have something waiting for the keyboardReadCharacterCallback
if (context->buf) {
return KEYBOARD_READY;
}
int c;
if (context->suspended) {
printf("Keyboard readiness register ($D011) trap read.\n");
printf("Press a key for input to keyboard register ($D010): ");
fflush(stdout);
crmode();
c = wgetch(context->screen);
printf("%c\r\n", c);
}
else {
int x, y;
@ -148,15 +154,9 @@ uint8_t keyboardReadReadyCallback(struct _v6502_memory *memory, uint16_t offset,
attroff(A_REVERSE);
wprintw(context->screen, " ");
wmove(context->screen, y, x);
}
int c = wgetch(context->screen);
if (context->suspended) {
printf("%c\r\n", c);
}
else {
int x, y;
getyx(context->screen, y, x);
c = wgetch(context->screen);
wmove(context->screen, 0, getmaxx(context->screen) - 1);
attron(A_REVERSE);
wprintw(context->screen, "!");
@ -164,17 +164,15 @@ uint8_t keyboardReadReadyCallback(struct _v6502_memory *memory, uint16_t offset,
wmove(context->screen, y, x);
}
if (c == '`') {
context->signalled++;
return KEYBOARD_NOTREADY;
switch (c) {
case '`':
context->signalled++;
case ERR:
return KEYBOARD_NOTREADY;
default:
context->buf = asciiCharFromCursesKey(c);
return KEYBOARD_READY;
}
if (c != ERR) {
context->buf = asciiCharFromCursesKey(c);
return KEYBOARD_READY;
}
return KEYBOARD_NOTREADY;
}
uint8_t keyboardReadCharacterCallback(struct _v6502_memory *memory, uint16_t offset, int trap, a1pia *context) {
@ -188,9 +186,12 @@ uint8_t keyboardReadCharacterCallback(struct _v6502_memory *memory, uint16_t off
if (context->buf) {
uint8_t a = a1CharFromAsciiChar(context->buf);
// Only pop the character off the buffer if this is a trapped read
if (trap) {
context->buf = '\0';
}
return a;
}