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16 lines
804 B
Plaintext
16 lines
804 B
Plaintext
Loader uses CBIOS Disk I/O prior to CBOOT/WBOOT being run. As a
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result, DIOBUF is not properly initialized. At present, it is
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initialized to $7C00 which will work unless the location of the
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physical disk buffer in HBIOS ever changes!
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The clock drivers supplied with BPBIOS (LDDS, LDP2D, and LDNZT)
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load into ZSYS user memory. If the user segment is not at the
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same location as the original BPBIOS ($E900), then the clock
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driver will just overlay other code. At present, the N config
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is OK because it does not relocate the user segment, but the T
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config fails because it uses a user segment at $E700. Note that
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this does not affect ZSDOS2 variants because they do not require
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a loadable clock driver.
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BPBIOS needs to assign disk units dynamically via discovery of disk type
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