| /* mp-s.c: SWTP MP-S serial I/O card emulator | |
| Copyright (c) 2005-2011, William Beech | |
| Permission is hereby granted, free of charge, to any person obtaining a | |
| copy of this software and associated documentation files (the "Software"), | |
| to deal in the Software without restriction, including without limitation | |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| and/or sell copies of the Software, and to permit persons to whom the | |
| Software is furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in | |
| all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| Willaim Beech BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
| IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| Except as contained in this notice, the name of William A. Beech shall not | |
| be used in advertising or otherwise to promote the sale, use or other dealings | |
| in this Software without prior written authorization from William A. Beech. | |
| These functions support a simulated SWTP MP-S interface card. | |
| The card contains one M6850 ACIA. The ACIA implements one complete | |
| serial port. It provides 7 or 8-bit ASCII RS-232 interface to Terminals | |
| or 20 mA current loop interface to a model 33 or 37 Teletype. It is not | |
| compatible with baudot Teletypes. Baud rates from 110 to 1200 are | |
| switch selectable from S! on the MP-S. The ACIA ports appear at all | |
| 4 addresses. This fact is used by SWTBUG to determine the presence of the | |
| MP-S vice MP-C serial card. The ACIA interrupt request line can be connected | |
| to the IRQ or NMI interrupt lines by a jumper on the MP-S. | |
| All I/O is via either programmed I/O or interrupt controlled I/O. | |
| It has a status port and a data port. A write to the status port | |
| can select some options for the device (0x03 will reset the port). | |
| A read of the status port gets the port status: | |
| +---+---+---+---+---+---+---+---+ | |
| | I | P | O | F |CTS|DCD|TXE|RXF| | |
| +---+---+---+---+---+---+---+---+ | |
| RXF - A 1 in this bit position means a character has been received | |
| on the data port and is ready to be read. | |
| TXE - A 1 in this bit means the port is ready to receive a character | |
| on the data port and transmit it out over the serial line. | |
| A read to the data port gets the buffered character, a write | |
| to the data port writes the character to the device. | |
| */ | |
| #include <stdio.h> | |
| #include <ctype.h> | |
| #include "swtp_defs.h" | |
| #define UNIT_V_TTY (UNIT_V_UF) // TTY or ANSI mode | |
| #define UNIT_TTY (1 << UNIT_V_TTY) | |
| /* local global variables */ | |
| int32 ptr_stopioe = 0; // stop on error | |
| int32 ptp_stopioe = 0; // stop on error | |
| int32 odata; | |
| int32 status; | |
| int32 ptp_flag = 0; | |
| int32 ptr_flag = 0; | |
| /* function prototypes */ | |
| t_stat sio_svc (UNIT *uptr); | |
| t_stat ptr_svc (UNIT *uptr); | |
| t_stat ptp_svc (UNIT *uptr); | |
| t_stat sio_reset (DEVICE *dptr); | |
| t_stat ptr_reset (DEVICE *dptr); | |
| t_stat ptp_reset (DEVICE *dptr); | |
| int32 sio0s(int32 io, int32 data); | |
| int32 sio0d(int32 io, int32 data); | |
| int32 sio1s(int32 io, int32 data); | |
| int32 sio1d(int32 io, int32 data); | |
| /* sio data structures | |
| sio_dev SIO device descriptor | |
| sio_unit SIO unit descriptor | |
| sio_reg SIO register list | |
| sio_mod SIO modifiers list */ | |
| UNIT sio_unit = { UDATA (&sio_svc, 0, 0), KBD_POLL_WAIT | |
| }; | |
| REG sio_reg[] = { | |
| { ORDATA (DATA, sio_unit.buf, 8) }, | |
| { ORDATA (STAT, sio_unit.u3, 8) }, | |
| { NULL } | |
| }; | |
| MTAB sio_mod[] = { | |
| { UNIT_TTY, UNIT_TTY, "TTY", "TTY", NULL }, | |
| { UNIT_TTY, 0, "ANSI", "ANSI", NULL }, | |
| { 0 } | |
| }; | |
| DEVICE sio_dev = { | |
| "MP-S", &sio_unit, sio_reg, sio_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &sio_reset, | |
| NULL, NULL, NULL | |
| }; | |
| /* paper tape reader data structures | |
| ptr_dev PTR device descriptor | |
| ptr_unit PTR unit descriptor | |
| ptr_reg PTR register list | |
| ptr_mod PTR modifiers list */ | |
| UNIT ptr_unit = { UDATA (&ptr_svc, UNIT_SEQ + UNIT_ATTABLE, 0), KBD_POLL_WAIT | |
| }; | |
| DEVICE ptr_dev = { | |
| "PTR", &ptr_unit, NULL, NULL, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &ptr_reset, | |
| NULL, NULL, NULL | |
| }; | |
| /* paper tape punch data structures | |
| ptp_dev PTP device descriptor | |
| ptp_unit PTP unit descriptor | |
| ptp_reg PTP register list | |
| ptp_mod PTP modifiers list */ | |
| UNIT ptp_unit = { UDATA (&ptp_svc, UNIT_SEQ + UNIT_ATTABLE, 0), KBD_POLL_WAIT | |
| }; | |
| DEVICE ptp_dev = { | |
| "PTP", &ptp_unit, NULL, NULL, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &ptp_reset, | |
| NULL, NULL, NULL | |
| }; | |
| /* console input service routine */ | |
| int32 sio_svc (UNIT *uptr) | |
| { | |
| int32 temp; | |
| sim_activate (&sio_unit, sio_unit.wait); // continue poll | |
| if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) | |
| return temp; // no char or error? | |
| sio_unit.buf = temp & 0xFF; // Save char | |
| sio_unit.u3 |= 0x01; // Set RXF flag | |
| /* Do any special character handling here */ | |
| sio_unit.pos++; // step character count | |
| return SCPE_OK; | |
| } | |
| /* paper tape reader input service routine */ | |
| int32 ptr_svc (UNIT *uptr) | |
| { | |
| int32 temp; | |
| sim_activate (&ptr_unit, ptr_unit.wait); // continue poll | |
| if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) | |
| return temp; // no char or error? | |
| ptr_unit.buf = temp & 0xFF; // Save char | |
| ptr_unit.u3 |= 0x01; // Set RXF flag | |
| /* Do any special character handling here */ | |
| ptr_unit.pos++; // step character count | |
| return SCPE_OK; | |
| } | |
| /* paper tape punch output service routine */ | |
| int32 ptp_svc (UNIT *uptr) | |
| { | |
| return SCPE_OK; | |
| } | |
| /* Reset console */ | |
| int32 sio_reset (DEVICE *dptr) | |
| { | |
| sio_unit.buf = 0; // Data buffer | |
| sio_unit.u3 = 0x02; // Status buffer | |
| sim_activate (&sio_unit, sio_unit.wait); // activate unit | |
| return SCPE_OK; | |
| } | |
| /* Reset paper tape reader */ | |
| int32 ptr_reset (DEVICE *dptr) | |
| { | |
| ptr_unit.buf = 0; | |
| ptr_unit.u3 = 0x02; | |
| sim_activate (&ptr_unit, ptr_unit.wait); // activate unit | |
| // sim_cancel (&ptr_unit); // deactivate unit | |
| return SCPE_OK; | |
| } | |
| /* Reset paper tape punch */ | |
| int32 ptp_reset (DEVICE *dptr) | |
| { | |
| ptp_unit.buf = 0; | |
| ptp_unit.u3 = 0x02; | |
| sim_activate (&ptp_unit, ptp_unit.wait); // activate unit | |
| // sim_cancel (&ptp_unit); // deactivate unit | |
| return SCPE_OK; | |
| } | |
| /* I/O instruction handlers, called from the MP-B2 module when a | |
| read or write occur to addresses 0x8004-0x8007. */ | |
| int32 sio0s(int32 io, int32 data) | |
| { | |
| if (io == 0) { // control register read | |
| if (ptr_flag) { // reader enabled? | |
| if ((ptr_unit.flags & UNIT_ATT) == 0) { // attached? | |
| ptr_unit.u3 &= 0xFE; // no, clear RXF flag | |
| ptr_flag = 0; // clear reader flag | |
| printf("Reader not attached to file\n"); | |
| } else { // attached | |
| if (feof(ptr_unit.fileref)) { // EOF | |
| ptr_unit.u3 &= 0xFE; // clear RXF flag | |
| ptr_flag = 0; // clear reader flag | |
| } else // not EOF | |
| ptr_unit.u3 |= 0x01; // set ready | |
| } | |
| return (status = ptr_unit.u3); // return ptr status | |
| } else { | |
| return (status = sio_unit.u3); // return console status | |
| } | |
| } else { // control register write | |
| if (data == 0x03) { // reset port! | |
| sio_unit.u3 = 0x02; // reset console | |
| sio_unit.buf = 0; | |
| sio_unit.pos = 0; | |
| ptr_unit.u3 = 0x02; // reset reader | |
| ptr_unit.buf = 0; | |
| ptr_unit.pos = 0; | |
| ptp_unit.u3 = 0x02; // reset punch | |
| ptp_unit.buf = 0; | |
| ptp_unit.pos = 0; | |
| } | |
| return (status = 0); // invalid io | |
| } | |
| } | |
| int32 sio0d(int32 io, int32 data) | |
| { | |
| if (io == 0) { // data register read | |
| if (ptr_flag) { // RDR enabled? | |
| if ((ptr_unit.flags & UNIT_ATT) == 0) // attached? | |
| return 0; // no, done | |
| // printf("ptr_unit.u3=%02X\n", ptr_unit.u3); | |
| if ((ptr_unit.u3 & 0x01) == 0) { // yes, more data? | |
| // printf("Returning old %02X\n", odata); // no, return previous byte | |
| return (odata & 0xFF); | |
| } | |
| if ((odata = getc(ptr_unit.fileref)) == EOF) { // end of file? | |
| // printf("Got EOF\n"); | |
| ptr_unit.u3 &= 0xFE; // clear RXF flag | |
| return (odata = 0); // no data | |
| } | |
| // printf("Returning new %02X\n", odata); | |
| ptr_unit.pos++; // step character count | |
| ptr_unit.u3 &= 0xFE; // clear RXF flag | |
| return (odata & 0xFF); // return character | |
| } else { | |
| sio_unit.u3 &= 0xFE; // clear RXF flag | |
| return (odata = sio_unit.buf); // return next char | |
| } | |
| } else { // data register write | |
| if (isprint(data) || data == '\r' || data == '\n') { // printable? | |
| sim_putchar(data); // print character on console | |
| if (ptp_flag && ptp_unit.flags & UNIT_ATT) { // PTP enabled & attached? | |
| putc(data, ptp_unit.fileref); | |
| ptp_unit.pos++; // step character counter | |
| } | |
| } else { // DC1-DC4 control Reader/Punch | |
| switch (data) { | |
| case 0x11: // PTR on | |
| ptr_flag = 1; | |
| ptr_unit.u3 |= 0x01; | |
| // printf("Reader on\n"); | |
| break; | |
| case 0x12: // PTP on | |
| ptp_flag = 1; | |
| ptp_unit.u3 |= 0x02; | |
| // printf("Punch on\n"); | |
| break; | |
| case 0x13: // PTR off | |
| ptr_flag = 0; | |
| // printf("Reader off-%d bytes read\n", ptr_unit.pos); | |
| break; | |
| case 0x14: // PTP off | |
| ptp_flag = 0; | |
| // printf("Punch off-%d bytes written\n", ptp_unit.pos); | |
| break; | |
| default: // ignore all other characters | |
| break; | |
| } | |
| } | |
| } | |
| return (odata = 0); | |
| } | |
| /* because each port appears at 2 addresses and this fact is used | |
| to determine if it is a MP-C or MP-S repeatedly in the SWTBUG | |
| monitor, this code assures that reads of the high ports return | |
| the same data as was read the last time on the low ports. | |
| */ | |
| int32 sio1s(int32 io, int32 data) | |
| { | |
| return status; | |
| } | |
| int32 sio1d(int32 io, int32 data) | |
| { | |
| return odata; | |
| } | |
| /* end of mp-s.c */ |