iAltair 4+

Vintage computing made easy

Peter Schorn

    • 4.8 • 10 Ratings
    • Free



iAltair pretends to be a MITS Altair 8800 computer. It allows you to get the feeling of really old software such as the CP/M 2 operating system. The system is fully self contained and does not allow you to remotely add any code but you can try out Basic to run Eliza.

What’s New

Version 2.2

• Improved scrolling behavior
• Support for entry of escape character

Ratings and Reviews

4.8 out of 5
10 Ratings

10 Ratings

jc8765asty ,

how do I run Eliza?

sorry, but how can I run Eliza? thanks

Tcr50 ,

Crashes in ios 6

It worked fine until this latest update. Now it crashes just after launch, before even selecting a CP/M version.

nhaquer ,

My first computer

The Altair 8800 from MITS of Albuquerque, NM, was my first computer. It came as a kit and was initially called a "minicomputer" in 1975. It had 256 BYTES of memory, which would not be enough to store this review. The front panel (the icon has the 8080B) had 2 rows of switches and 2 rows of LED's. In simple terms the top row of switches controlled the address and data registers (memory) and the buttom the cpu (run, single step, input/output, write/read, etc).

After building the 8080, there was no operating system, no basic, no nothing. You would create your very simple "program" by flipping those switches and hoping to get a reaction, such as adding some binary numbers together. Eventually BASIC would become available along with 1k memory board. I had hooked this up to an ASR33 teletype machine and was able to finaly save and load programs using paper tape punched with holes.

It would be another year before a floppy was added, and you had to write your own assembler programs to make them work. When Gary Kidall released CP/M, it still required a lot of hours to get it to work and you had to "roll your own" BIOS (Basic Input / Output System) or "drivers" to get anything to work.

The first Apple computer would become available about a year and half later and also came in a kit. But it had BASIC built in and only had to be hooked up to a TV screen to make it work.

Interacting with CP/M was done on a paper printing terminal rather then "glass" dispaly. Eventually I got an ADM display.

When I first saw this I was hoping for a real simulator with functioning switches and controls, but, alas (as Jerry Pournellle would often say) it accomplished its goal of taking me down memory lane.

App Privacy

The developer, Peter Schorn, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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