Alto Hardware Manual
APPENDIX G
- SUMMARY
OF
KNOWN
FEATURESIBUGS·
IN
RELEASED MICROCODE VERSIONS
Alto I version
23:
VERS
instruction:
BITBLT
instruction:
Alto
II version
2:
VERS
instruction:
BITBLT
instruction:
RDRAM
instruction:
DEXCH
instruction:
SIT
instruction:
ACSOURCE
function:
Alto I version
24:
No
known bugs.
Alto
II version
3:
SIT
instruction:
returns engineering number
0,
microcode version
1.
doesn't work reliably
if
some ram-related task is running
(e.g., the Trident disk).
returns engineering number
2,
microcode version
O.
doesn't
work
reliably
if
some ram-related task is running
(e.g.,
the Trident disk). Expects L to be zeroed by the
caller.
does not
work.
reliably when the Ethernet interface
is
active.
does not work at
all.
TIMEMASK
is
7700B
but should be
7774B.
Fails to store
into
ITQUAN.
does not
work
precisely
as
documented.
McCreight
if
you really need to know.
Fails
to
store into ITQUAN.
Consult
71
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