This change adds support for printing to an attached text file via the
Centronics port of a simulated PORTS feature card. A new device named
"LPT" has been added. See "help lpt" for documentation.
Additionally, there has been a fix to a bug in the SCSI tape boot
implementation and a very minor bug fix to the Rev 3 MMU.
After adding the sim_clock_precalibrate_commands, the PC was not zero
at the sim> prompt after loading altairz80.
Set CPU_S to zero in cpu_reset to address this issue.
This corrects an error that caused SIO reject when SIO occured before
a pending seek interrupt on a different device.
- Move the interrupt pending test from sigma_io.c into each device.
- Make the sigma_dp.c test a special case that looks for pending
seek interrupts.
While working on the AltairZ80 documentation, I found some problems
with the SOL20 registers and fixed some formatting issues.
Added static and "vdm1_" prefix to "charset" variable in s100_vdm1.c
This PR adds support for the Processor Technology VDM-1 display adapter and Sol-20 computer system. The VDM-1 was integrated into the Sol-20 but has been separated out into its own device.
This PR adds the following devices to the AltairZ80 simulator:
VDM1 - Processor Technology VDM-1 display adapter
SOL20 - Processor Technology SOL20 with SOLOS ROMs
SOL20K - SOL20 Keyboard (callback from VDM1)
SOL20T - SOL20 Tape (reads/writes cassette file images)
SOL20S - SOL20 Serial Port (TMXR capable)
SOL20P - SOL20 Printer Port (TMXR capable)
Used to initialize SCP timers to prevent problems during simulator startup
when THROTTLE is being used.
/*
* This sequence of instructions is a mix that mimics
* a resonable instruction set that is a close estimate
* to the calibrated result.
*/
static const char *cpu_clock_precalibrate_commands[] = {
"-m 100 LXI H,200H",
"-m 103 MVI B,0",
"-m 105 DCR B",
"-m 106 MOV M,B",
"-m 107 INX H",
"-m 108 JNZ 0105H",
"-m 10B JMP 0100H",
"PC 100",
NULL};
- Builds x86 and x64 regular snapshots.
x64: Mon Wed Fri
x86: Tue Thu Sat
ARM: Mon Thu Sun (ARM not enabled)
- Builds x64 on closed pull request, Release
- Manual trigger allows selection of ref, platform,
architecture, config, disposition
- Releases and daily snapshots are deployed automagically
- VS Project 2022 files updated for ARM, but not setup for
cross-builds (BuildROMs) or tested on ARM (no hardware)
- Fix makefile tests for cygwin
Proper initialization of the ADCS6 unit data structure depended on the
ADCS6 device being enabled. In cases where the ADCS6 unit was not
enabled, non-debug builds may crash on some host platforms depending on
compiler/memory layout.
This is to prevent confusion when questions come in.
Plus, a little advertising never hurts.
The version output will now include "Open SIMH", and the version
number will be '4.1.*' rather than '4.0.*'.
Start of support for PiDP10 front panel.
Moved interrupt checking from check_irq_level to clear_interrupt.
Pending interrupts now saved in IOB_PI.
Cleanup of KL10 Timer interrupts.
Minor code cleanup.
