How do I check that the OHRRPGCE has enough conventional memory to work correctly?
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This article only applies to the DOS/QuickBasic 16-bit version. It is not relevant for the current 32/64 bit Windows/Linux/Mac/etc versions
Got to an MS-DOS prompt, and type MEM. You will see output something like this:
C:\>mem Memory Type Total Used Free ---------------- -------- -------- -------- Conventional 640K 10K 630K Upper 128K 8K 120K Reserved 256K 256K 0K Extended (XMS) 16,384K 8,292K 8,092K ---------------- -------- -------- -------- Total memory 17,408K 8,566K 8,842K Total under 1 MB 768K 18K 750K Total Expanded (EMS) 2,048K (2,097,152 bytes) Free Expanded (EMS) 2,048K (2,097,152 bytes) Largest executable program size 630K (645,168 bytes) Largest free upper memory block 117K (120,160 bytes) FreeDOS is resident in the high memory area.
Look for the line that says Largest executable program size. If it is smaller than about 552K then you will not be able to use the DOS version of the OHRRPGCE.
You should probably be using the Windows version instead.