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Fix a 17 year old bug: paddle were not properly handled, funny I never got issues before Twin Dragons with that!

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Though Twin Dragon way of writing to 4016 is nasty! ;P
This commit is contained in:
Godzil 2019-12-06 12:34:11 +00:00
parent d37ad746b1
commit 1d6afc5473
2 changed files with 25 additions and 30 deletions
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4
src/include/paddle.h
View File

@ -12,8 +12,8 @@
typedef struct Paddle_
{
uint8_t Bit;
uint8_t LastWrite;
uint8_t bitPos;
uint8_t strobeState;
} Paddle;
uint8_t ReadPaddle(Paddle *pdl);

51
src/paddle.c
View File

@ -6,99 +6,94 @@
* Copyright (c) 2002-2019 986-Studio.
*
*/
#include <stdio.h>
#include <os_dependent.h>
#include "paddle.h"
void InitPaddle(Paddle *pdl)
{
pdl->Bit = 1;
pdl->LastWrite = 0;
pdl->bitPos = 1;
pdl->strobeState = 0;
}
void WritePaddle(Paddle *pdl, uint8_t val)
{
if ((pdl->LastWrite == 1) && (val == 0))
{
InitPaddle(pdl);
}
pdl->LastWrite = val;
pdl->strobeState = val & 1;
pdl->bitPos = 1;
}
uint8_t ReadPaddle(Paddle *pdl)
{
switch (pdl->Bit++)
{
uint8_t ret = 0x40;
switch (pdl->bitPos)
{
case 1:
if (getKeyStatus('O'))
{
return 0x41;
ret = 0x41;
}
break;
case 2:
if (getKeyStatus('P'))
{
return 0x41;
ret = 0x41;
}
break;
case 3:
if (getKeyStatus('I'))
{
return 0x41;
ret = 0x41;
}
break;
case 4:
if (getKeyStatus('U'))
{
return 0x41;
ret = 0x41;
}
break;
case 5:
if (getKeyStatus('W'))
{
return 0x41;
ret = 0x41;
}
break;
case 6:
if (getKeyStatus('S'))
{
return 0x41;
ret = 0x41;
}
break;
case 7:
if (getKeyStatus('A'))
{
return 0x41;
ret = 0x41;
}
break;
case 8:
if (getKeyStatus('D'))
{
return 0x41;
ret = 0x41;
}
break;
case 20:
return 0x40;
case 24:
pdl->Bit = 1;
return 0x40;
default:
return 0x40;
ret = 0x41;
}
return 0x40;
if ((pdl->strobeState == 0) && (pdl->bitPos <= 9))
{
pdl->bitPos++;
}
return ret;
}