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9e3d414ef2
This update to the Altair8800 simulator includes: Adds MITS hard disk controller device Adds FarmTek FDC+ disk controller device (1.5MB) Adds iCOM 3712/3812 disk controller device Adds Processor Technology VDM1 video device Fixes boot bug in TARBELL and VFII devices TARBELL returns 0xff for DMA status if 1011 Fixes DAZZLER vertical blank status timing Adds DDT command to control DDT-style output Improves MEMORY dump display
132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/* s100_po.c: MITS Altair 8800 Programmed Output
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Copyright (c) 2025 Patrick A. Linstruth
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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PETER SCHORN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of Patrick Linstruth shall not
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be used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from Patrick Linstruth.
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History:
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07-Nov-2025 Initial version
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*/
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#include "sim_defs.h"
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#include "s100_bus.h"
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#include "s100_po.h"
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#define DEVICE_NAME "PO"
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static int32 poc = TRUE; /* Power On Clear */
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static int32 PO = 0; /* programmed output register */
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static t_stat po_reset (DEVICE *dptr);
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static int32 po_io (const int32 addr, const int32 rw, const int32 data);
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static t_stat po_show_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
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static const char* po_description(DEVICE *dptr) {
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return "Front Panel";
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}
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static UNIT po_unit = {
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UDATA (NULL, UNIT_PO_VERBOSE, 0)
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};
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static REG po_reg[] = {
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{ HRDATAD (PO, PO, 8, "Programmed Output") },
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{ NULL }
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};
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static MTAB po_mod[] = {
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{ UNIT_PO_VERBOSE, UNIT_PO_VERBOSE, "VERBOSE", "VERBOSE", NULL, NULL,
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NULL, "Enable verbose messages" },
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{ UNIT_PO_VERBOSE, 0, "QUIET", "QUIET", NULL, NULL,
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NULL, "Disable verbose messages" },
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{ 0 }
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};
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/* Debug Flags */
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static DEBTAB po_dt[] = {
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{ NULL, 0 }
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};
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DEVICE po_dev = {
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DEVICE_NAME, &po_unit, po_reg, po_mod,
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1, ADDRRADIX, ADDRWIDTH, 1, DATARADIX, DATAWIDTH,
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NULL, NULL, &po_reset,
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NULL, NULL, NULL,
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NULL, (DEV_DISABLE | DEV_DIS), 0,
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po_dt, NULL, NULL, &po_show_help, NULL, NULL, &po_description
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};
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static t_stat po_reset(DEVICE *dptr) {
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if (dptr->flags & DEV_DIS) { /* Disable Device */
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s100_bus_remio_out(0xff, 1, &po_io);
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poc = TRUE;
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}
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else {
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if (poc) {
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s100_bus_addio_out(0xff, 1, &po_io, DEVICE_NAME);
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poc = FALSE;
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}
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}
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return SCPE_OK;
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}
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static int32 po_io(const int32 addr, const int32 rw, const int32 data)
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{
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if (rw == S100_IO_WRITE) {
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PO = data & DATAMASK;
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if (po_unit.flags & UNIT_PO_VERBOSE) {
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sim_printf("\n[PO %02X]\n", (~data) & DATAMASK); /* IMSAI FP is Inverted */
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}
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}
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return 0x0ff;
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}
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static t_stat po_show_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr)
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{
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fprintf (st, "\nProgrammed Output (%s)\n", dptr->name);
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fprint_set_help (st, dptr);
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fprint_show_help (st, dptr);
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fprint_reg_help (st, dptr);
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fprintf(st, "\n");
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fprintf(st, "The IMSAI front panel has a Programmed Output port (FFh) with LED indicators.\n");
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fprintf(st, "The Altair does not have this feature. The %s device adds this feature to the\n", dptr->name);
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fprintf(st, "simulator. When the device is enabled, any OUT instruction to I/O port FF\n");
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fprintf(st, "will display '[PO XX]' on the console. Note that the value displayed will be\n");
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fprintf(st, "inverted to match the functionality of the IMSAI.\n");
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fprintf(st, "\n");
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fprintf(st, "SET PO QUIET will suppress the Programmed Output messages.\n");
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return SCPE_OK;
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}
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