Re: VM02 Beta 1

[David Schmenk <dschmenk@YUCH.gmail.com>]

John B. Matthews wrote:
> In article <EYEzk.346$as4.143@nlpi069.nbdc.sbc.com>,
>  David Schmenk <dschmenk@YUCH.gmail.com> wrote:
>
> > John B. Matthews wrote:
> [...]
> > > I get similar results on KEGSMAC or KEGS-OSX, which emulate a //e 80 
> > > column card (ctrl-Q -> 40-columns, ctrl-R -> 80 columns, ctrl-U -> quit, 
> > > etc.) I see LDA #26 in vm02.s under VM_WARMINIT, which does clear line 
> > > on the //e 80 column firmware.
> > >
> > > I see my MACHID ($BF98) is $B3 (%10110011), suggesting a 128K //e with 
> > > 80 columns and clock.
> > >
> > > 110 * (Bit 3 off) BITS 7,6-  00=II  01=II+   10=IIe   11=/// EMULATION
> > > 111 * (Bit 3 on)  BITS 7,6-  00=NA  01=NA    10=//c   11=NA
> > > 112 *             BITS 5,4-  00=NA  01=48K   10=64K   11=128K
> > > 113 *             BIT  3  -  Modifier for MACHID Bits 7,6.
> > > 114 *             BIT  2  -  RESERVED FOR FUTURE DEFINITION.
> > > 115 *             BIT  1=1-  80 Column card
> > > 116 *             BIT  0=1-  Recognizable Clock Card
> > >
> > > I'll poke around in io.s to see if anything jumps out.
> > That's it.  The #26 is part of the control sequence for the Videx card: 
> > Ctrl-Z 1.  Then a backspace in case it shows up.  Then the next control 
> > code, #21, is for the IIe/IIc 80 column card.
>
> D'oh! Your code is correct. I was confounding the execution of Hello 
> with the subsequent vm warm start after Hello exits.

Soon I will move that code into the IOCTL_DISABLE or IOCTL_DEACTIVATE 
clause of the console device driver (see the code just above in vm02.s). 
 I don't like it cluttering up my warm init code :-)

Dave...