Sorry, I missed the first part of this thread. Is this MBasic for DOS?
If so, don't you need **genuine** boot ROMs to make MBasic work properly?
Leonard
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Monday, April 06, 2015 8:17 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:6702] CP/M Mbasic 5.21
Todd,
That is really weird. I get the same results here.
Funny thing is when I do a
PRINT E * 4
I get 4
but when I do
PRINT 4 * E
I get the same floating point number you do.... Hmmm
I wonder if it has to do with the type of variable? Could it be assuming that 4 is an integer and E is a floating point variable? But when you do E * 4, it assumes 4 is now a floating point constant?
Either way, looks like this 5.21 BASIC has a bug...
Cheers,
Josh
Date: Mon, 6 Apr 2015 12:24:23 -0700
From: litte...@gmail.com
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:6691] CP/M Mbasic 5.21
I've been messing around with Josh's 8080 board.
I XMODEM'd a basic program written in NorthStar Basic
over to Josh's board to play with. After making a few
corrections for the different versions of Basic. It almost
runs...
It's been awhile since I've wrote a basic program, but I
just don't understand why the CP/M ver of basic does this;
ALTAIR/IMSAI CPU CARD. 61K CP/M 2.2
WBOOT
a>MBASIC
BASIC-80 Rev. 5.21
[CP/M Version]
Copyright 1977-1981 (C) by Microsoft
Created: 28-Jul-81
31800 Bytes free
Ok
E=1
Ok
PRINT 4 * E
-2.41704E-35
Ok
Z=10
Ok
PRINT 4 * Z
-2.41704E-34
Ok
In my mind 4 * E should equal one
and 7 * Z should equal ten.
Why am I getting -2.xxxxEyy ?????
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