22 May
2020
22 May
'20
6:52 p.m.
You know, reading about this made me dig out the info I had on the Character Oriented
Windows ("COW") library. I was reading some of the docs and it occurred to me
that it operated much like Windows (probably Windows 1), but what I couldn't find were
any "sample" programs or tools to build a program based on the COW library. Does
anyone have/know of a sample program that used the library? Was there an SDK for it or was
it used only for Microsoft's products?
Just looking for something new/interesting to learn about. Thanks!
Rich
?On 5/22/20, 11:35 AM, "cctalk on behalf of Chuck Guzis via cctalk"
<cctalk-bounces at classiccmp.org on behalf of cctalk at classiccmp.org> wrote:
A quick look at the code indicates to me that the Intel translator
CONV86 may well have done the translation in "strict" mode. Of course,
there were other translators, but some of the stuff rings a bell.
For example, the 8080 instruction
INX B
gets translated to
SAHF
INC BX
LAHF
all done because the 8080 16-bit instruction does not affect the zero
and carry flags, but the 8086 instruction INC, does. So there's very
likely a large amount (my experience was at least >30%) of cruft in the
code.
--Chuck