This App tests the system’s RAM. It runs on systems with at least 64k bytes of RAM and the ability to page out ROM by writing to port 0x38.
If there is more than 64k of RAM, only the primary 64k is tested.
Currently, there is not a version of this program for the Z180 processor.
Version 2 of this App tests to see if the ROM is not being paged out, thus helping to identify issues with the paging circuitry.
Version 1 is a better choice if you want a test program that can be left running, continuously testing the RAM.
| Recommended for Z80 processors |
| Requirements: Small Computer Monitor (SCM) v1.0 or later Z80 processor |
| SCM_MemTest_v2.0_Z80.hex (code starts at 8000) |
| Version 2.0 (2022-07-27) |
| Source code |
| SCM_MemTest_v2.0_Z80.asm |
| Version 2.0 (2022-07-27) |
Below is an example of the terminal output when loading and running the App.
Small Computer Monitor - RC2014 * <<< send hex file here >>> *Ready * *g8000 Z80 64k memory test v2.0 by Stephen C Cousins Upper 32k RAM: Pass Lower 32k RAM: Pass ROM page out test: Pass *
Small Computer Central 