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Bank 0: | 256 KB sized, | addressed 00000 to 0FFFF hex | ( 0 KB to 256 KB) (socketed) |
Bank 1: | 256 KB sized, | addressed 40000 to 7FFFF hex | (256 KB to 512 KB) (socketed) |
Bank 2: | 64 KB sized, | addressed 80000 to 907FF hex | (512 KB to 578 KB) (socketed) |
Bank 3: | 64 KB sized, | addressed 90800 to 9FFFF hex | (578 KB to 640 KB) (socketed) |
• | Some video cards will not work with this PC (and XT) version of the Supersoft/Landmark ROM. - My IBM MDA card works. - My IBM CGA card works. - My IBM EGA card will display, but poorly. - My unbranded clone MDA card works. - My unbranded clone CGA card works. - None of my VGA cards work. More information here. |
• | The SYSTEM MEMORY TO A0000 test will fail if less than 640 KB of RAM is fitted (motherboard and/or expansion card). This is irrespective of what the SW1 switches are set to. |
• | The KEYBOARD CONTROLLER test will fail if no XT-class keyboard is connected to the 5160 motherboard. |
• | The FLOPPY CONTROLLER test requires that a floppy controller card is fitted to the 5160 motherboard. For this test, the card does not need any drives connected to it. |
• | The FLOPPY READ test takes about 1.5 minutes to fail. Be patient. |
• | The NONMASKABLE INTERRUPT test will fail if the math coprocessor (8087) is absent and you have switch 2 on SW1 in the wrong position for that (off). |
• | The SLOW REFRESH TO A0000 test takes a few minutes to go through 640 KB of RAM. |
• | This is the same diagnostic ROM used for the IBM 5150. It suits the 5150, 5155 and 5160. |
• | An example output is shown at here. |
• | On this 256KB-640KB motherboard, the 16K CRITICAL MEMORY REGION test needs only motherboard bank 0 to be populated. |
• | On this 256KB-640KB motherboard, the MEMORY REFRESH test needs only motherboard bank 0 to be populated. |
• | Make sure that SW1 is set according to how banks of motherboard RAM that you have populated, noting that per above, a total of 640 KB of RAM is required for the SYSTEM MEMORY TO A0000 test. |
• | References to chips are for the corresponding chip on a 5150 motherboard. For example, the second test displays U33 SUPERSOFT ROM CHECKSUM even though the Supersoft/Landmark ROM is in socket U18 (not the quoted U33) |
• | Ignore the boxes labelled, "PC SW1" and "PC SW2". They are for when the ROM is used in an IBM 5150 (IBM PC). |
• | The term 'KEYBOARD CONTROLLER' is misleading. Unlike the IBM 5170, the IBM 5160 does not have a keyboard controller chip. Discrete components are used instead. |
• | There is nothing in the manual that indicates that codes are sent to port 80h. |
• | The Supersoft/Landmark ROM even generates a display if there is no RAM on the motherboard. More information here. |