When I boot AppleWin (1.20.0) while emulating an Apple //e (regular, not enhanced) and try to access hi-res page 2:
]CALL -151
*C050
*C057
*C055
It seems to always stay on hi-res page 1 instead. When I boot a program that does HGR2 and loads a picture into $4000, I also notice that it doesn't display it, but stays on page 1 instead.
If I switch to emulating an enhanced Apple //e, it works fine.
If I switch to emulating an Apple ][+, it works fine.
That suggests that something is amiss in the $C055 softswitch for the Apple //e emulation?
On Monday, September 3, 2012 8:18:17 AM UTC-5, Hot Rod wrote:
> Hello,
> When I boot AppleWin (1.20.0) while emulating an Apple //e (regular, not enhanced) and try to access hi-res page 2:
> ]CALL -151
> *C050
> *C057
> *C055
> It seems to always stay on hi-res page 1 instead. When I boot a program that does HGR2 and loads a picture into $4000, I also notice that it doesn't display it, but stays on page 1 instead.
> If I switch to emulating an enhanced Apple //e, it works fine.
> If I switch to emulating an Apple ][+, it works fine.
> That suggests that something is amiss in the $C055 softswitch for the Apple //e emulation?
On Monday, September 3, 2012 9:54:52 AM UTC-5, BLuRry wrote:
> Is it misinterpreting the 80store switch? What if you explicitly set 80store off (c000:0) before trying to flip to page2?
> -B
I tried that, and it doesn't seem to have any effect; still doesn't flip to page2.
Hot Rod <hotrod.app...@gmail.com> wrote:
> On Monday, September 3, 2012 9:54:52 AM UTC-5, BLuRry wrote:
>> Is it misinterpreting the 80store switch? What if you explicitly set
>> 80store off (c000:0) before trying to flip to page2?
>> -B
> I tried that, and it doesn't seem to have any effect; still doesn't flip to page2.
I always go into 40-column mode by PRINTing CHR$(21) before doing an HGR2
in AppleSoft. Otherwise, it doesn't switch.
Unfortunately, I've never taken the time to determine exactly why. ;-(
Hot Rod <hotrod.app...@gmail.com> wrote:
> On Sunday, September 16, 2012 2:31:57 PM UTC-5, TomCh wrote:
>> On Tuesday, 4 September 2012 03:51:34 UTC+1, Hot Rod wrote:
>>> On Monday, September 3, 2012 9:08:56 PM UTC-5, Michael J. Mahon wrote:
>>>> I always go into 40-column mode by PRINTing CHR$(21) before doing an HGR2
>>>> in AppleSoft. Otherwise, it doesn't switch.
>>>> Unfortunately, I've never taken the time to determine exactly why. ;-(
>>> That doesn't work either (with AppleWin emulating a //e). Still
>>> doesn't switch to page2. I just use Enhanced //e or ][+ emulation for now instead.
>> In //e mode, I see a flash of HGR page2 before it switches back to page1.
>> But this works:
>> ]CALL -151
>> *300: AD 50 C0 AD 57 C0 AD 55 C0 4C 9 3
>> So it must be something in the firmware that is switching back to page1.
>> Tom
> That's interesting. Running that code does indeed get to page 2. > However, if I just access the softswitch addresses directly from monitor:
> ]CALL -151
> *C050
> *C057
> *C055
> It does not display page 2 when emulating an Apple //e. This does work
> when emulating a ][+ or enhanced //e.
> Kinda odd.
If you're in 80-column mode, any output to the screen (like a prompt) will
twitch 80store.
> > > That doesn't work either (with AppleWin emulating a //e). Still doesn't switch to page2. I just use Enhanced //e or ][+ emulation for now instead.
> > In //e mode, I see a flash of HGR page2 before it switches back to page1.
> > But this works:
> > ]CALL -151
> > *300: AD 50 C0 AD 57 C0 AD 55 C0 4C 9 3
> > So it must be something in the firmware that is switching back to page1.
> > Tom
> That's interesting. Running that code does indeed get to page 2. However, if I just access the softswitch addresses directly from monitor:
> ]CALL -151
> *C050
> *C057
> *C055
> It does not display page 2 when emulating an Apple //e. This does work when emulating a ][+ or enhanced //e.
> Kinda odd.
Just set a BP on $C054... there must be something in the firmware ($C100..$CFFF) that accesses this during the CIN / COUT (and other) routines.
ie:
]CALL-151
F7 to enter AppleWin's debugger
>BPM c054
>g
*C055<CR>
This hits 3 times at $CB45: STA SW.LOWSCR
Interestingly, just pressing RETURN from the monitor doesn't trigger this BP.
Also:
*C054<CR>
This hits at $FDBB: LDA (MON.A1L),Y ; Y=0
Then once at $CB45
On Monday, September 3, 2012 6:18:17 AM UTC-7, Hot Rod wrote:
> When I boot AppleWin (1.20.0) while emulating an Apple //e (regular, not enhanced) and try to access hi-res page 2:
On Monday, September 3, 2012 6:18:17 AM UTC-7, Hot Rod wrote:
> Hello,
> When I boot AppleWin (1.20.0) while emulating an Apple //e (regular, not enhanced) and try to access hi-res page 2:
i JUST ran into some weirdness with HGR2 with applewin as well...
Enhanced IIe mode
I had some code at $4000 that I wanted to clear out to zero... I was in PR#3 80 column mode.
]HGR2 (TWO)
it displays the hgr1 (ONE) screen ($2000, I verified this by doing 2000:FF FF in the monitor, it displays 14 lit pixels) and the HGR1 (ONE) screen is NOT cleared.
