27 lines
1.1 KiB
Plaintext
27 lines
1.1 KiB
Plaintext
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AST RESEARCH TECHNICAL BULLETIN TB-0177 6-4-86
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REX.SYS MEMORY ALLOCATION AND IBM XT MODEL 516089
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While testing was being conducted on the Model 516089 (new) IBM
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PC-XT, a possible discrepancy was observed with REX.SYS (Extended
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Memory Emulator). Two identical XT's with the same
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configurations were used. Both XT's had subdirectories
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containing the REMM.SYS and REX.SYS files. Both XT's contained
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CONFIG.SYS files with the proper paths specified to REMM.SYS and
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REX.SYS.
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One XT worked properly and allocated the specified amount of
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memory to REX.SYS.
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The second XT is where the discrepancy was noticed. When REX.SYS
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is invoked from a subdirectory, regardless of how much memory is
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allocated to REX.SYS, it will only accept 64K bytes of extended
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memory emulation (REX). However, when REX.SYS is invoked from
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the root directory, the amount of memory allocated is equal to
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the amount specified.
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If this problem is encountered, it is suggested to put REMM.SYS
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and REX.SYS in the root directory.
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