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AltairZ80: Add CTS command to M2SIO device

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This commit is contained in:
Patrick Linstruth 2023-07-30 09:23:44 -04:00
parent cf47a20fd4
commit 9247b96b37
2 changed files with 7 additions and 1 deletions
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8
AltairZ80/s100_2sio.c
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@ -230,6 +230,8 @@ static TMXR m2sio1_tmxr = { /* multiplexer descriptor */
#define UNIT_M2SIO_DTR (1 << UNIT_V_M2SIO_DTR)
#define UNIT_V_M2SIO_DCD (UNIT_V_UF + 2) /* Force DCD active low */
#define UNIT_M2SIO_DCD (1 << UNIT_V_M2SIO_DCD)
#define UNIT_V_M2SIO_CTS (UNIT_V_UF + 3) /* Force CTS active low */
#define UNIT_M2SIO_CTS (1 << UNIT_V_M2SIO_CTS)
static MTAB m2sio_mod[] = {
{ MTAB_XTD|MTAB_VDV, 0, "IOBASE", "IOBASE",
@ -246,6 +248,10 @@ static MTAB m2sio_mod[] = {
"Force DCD active low" },
{ UNIT_M2SIO_DCD, 0, "NODCD", "NODCD", NULL, NULL, NULL,
"DCD follows status line (default)" },
{ UNIT_M2SIO_CTS, UNIT_M2SIO_CTS, "CTS", "CTS", NULL, NULL, NULL,
"Force CTS active low" },
{ UNIT_M2SIO_CTS, 0, "NOCTS", "NOCTS", NULL, NULL, NULL,
"CTS follows status line (default)" },
{ MTAB_XTD|MTAB_VDV|MTAB_VALR, 0, "BAUD", "BAUD", &m2sio_set_baud, &m2sio_show_baud,
NULL, "Set baud rate (default=9600)" },
{ 0 }
@ -440,7 +446,7 @@ static t_stat m2sio_svc(UNIT *uptr)
tmxr_set_get_modem_bits(xptr->tmln, 0, 0, &s);
stb = xptr->stb;
xptr->stb &= ~M2SIO_CTS;
xptr->stb |= (s & TMXR_MDM_CTS) ? 0 : M2SIO_CTS; /* Active Low */
xptr->stb |= ((s & TMXR_MDM_CTS) || (uptr->flags & UNIT_M2SIO_CTS)) ? 0 : M2SIO_CTS; /* Active Low */
if ((stb ^ xptr->stb) & M2SIO_CTS) {
sim_debug(STATUS_MSG, uptr->dptr, "CTS state changed to %s.\n", (xptr->stb & M2SIO_CTS) ? "LOW" : "HIGH");
}

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doc/altairz80_doc.docx
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