static int
readblock(CBM_FILE fd, unsigned char *p, unsigned int length)
{
unsigned char c1;
unsigned char c2;
SETSTATEDEBUG(DebugByteCount = 0);
for (; length < 0x100; length++)
{
SETSTATEDEBUG(DebugByteCount += 2);
if (pp_read(fd, &c1, &c2))
{
SETSTATEDEBUG(DebugByteCount = -1);
return 1;
}
*p++ = c1; length++;
if (length < 0x100)
*p++ = c2;
}
SETSTATEDEBUG(DebugByteCount = -1);
// perform end-handshake
pp_read(fd, &c1, &c2);
SETSTATEDEBUG((void)0);
return 0;
}
static int read_block(unsigned char tr, unsigned char se, unsigned char *block)
{
int i;
unsigned char status;
pp_write(fd_cbm, tr, se);
#ifndef USE_CBM_IEC_WAIT
arch_usleep(20000);
#endif
pp_read(fd_cbm, &status, &status);
for(i=0; i<BLOCKSIZE; i+=2) pp_read(fd_cbm, &block[i], &block[i+1]);
return status;
}
static int
read2byte(CBM_FILE fd, unsigned char *c1, unsigned char *c2)
{
int ret;
SETSTATEDEBUG(DebugByteCount = -12801);
ret = pp_read(fd, c1, c2);
SETSTATEDEBUG(DebugByteCount = -1);
return ret;
}
static int read_gcr_block(unsigned char *se, unsigned char *gcrbuf)
{
int i;
unsigned char s;
pp_read(fd_cbm, &s, &s);
*se = s;
pp_read(fd_cbm, &s, &s);
if(s) {
return s;
}
for(i = 0; i < GCRBUFSIZE; i += 2) {
pp_read(fd_cbm, &gcrbuf[i], &gcrbuf[i+1]);
}
return 0;
}
static int
read1byte(CBM_FILE fd, unsigned char *c1)
{
unsigned char dummy;
int ret;
SETSTATEDEBUG(DebugByteCount = -6401);
ret = pp_read(fd, c1, &dummy);
SETSTATEDEBUG(DebugByteCount = -1);
return ret;
}
/* read_n redirects USB reads to the external reader if required */
static void read_n(unsigned char *data, int size)
{
int i;
if (opencbm_plugin_pp_dc_read_n)
{
opencbm_plugin_pp_dc_read_n(fd_cbm, data, size);
return;
}
for(i=0;i<size/2;i++,data+=2)
pp_read(fd_cbm, data, data+1);
}
static int write_block(unsigned char tr, unsigned char se, const unsigned char *blk, int size, int read_status)
{
int i = 0;
unsigned char status;
pp_write(fd_cbm, tr, se);
if(size % 2) {
pp_write(fd_cbm, *blk, *blk);
i = 1;
}
for(; i<size; i+=2) pp_write(fd_cbm, blk[i], blk[i+1]);
#ifndef USE_CBM_IEC_WAIT
if(size == BLOCKSIZE) {
arch_usleep(20000);
}
#endif
pp_read(fd_cbm, &status, &status);
return status;
}
