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Josh's Altair/IMSAI Replacement (JAIR) is a single board computer (SBC) for the S100 bus. I created this device to assist a friend with getting IMP and CBBS working on his JAIR. Without having a JAIR myself, AltairZ80 to the rescue! The following devices are added: JAIR - The main JAIR board I/O and ROM JAIRS0 - Serial Port 0 (COM1) JAIRS1 - Serial Port 1 (COM2) JAIRP - Parallel Port This was a bit challenging because the JAIR uses an on-board SD card with FAT file system to hold its BIOS and CP/M disk images. The ATTACH command is used to mount SD card images to the simulator. The simulator emulates the SD card interface for read/writing SD card sectors. These images are easily mounted on a Mac making moving files around easy. I do not know about Windows. These same images can be written to an SD card and used with real JAIR hardware, which may be useful for JAIR owners. The serial and parallel ports fully support TMXR. Host serial ports and sockets may be attached to these devices. I am working on a GitHub repository containing an SD card image and init script that will boot CP/M 2.2 on the JAIR simulator. Is this device one that should be added to AltairZ80?
Open SIMH machine simulator
This is the codebase of SIMH, a framework and collection of computer system simulators.
SIMH was created by Bob Supnik, originally at Digital Equipment Corporation, and extended by contributions of many other people. It is now an open source project, licensed under an MIT open source license (see LICENSE.txt for the specific wording). The project gatekeepers are the members of the SIMH Steering Group. We welcome and encourage contributions from all. Contributions will be covered by the project license.
The Open SIMH code base was taken from a code base maintained by Mark Pizzolato as of 12 May 2022. From that point onward there is no connection between that source and the Open SIMH code base. A detailed listing of features as of that point may be found in SIMH-V4-status.
PLEASE NOTE
Do not contribute material taken from github.com/simh/simh unless you are the author of the material in question.
