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Groups > comp.sys.apple2.programmer > #3841 > unrolled thread

Origin of TEMPOP $2E ?

Started byMichael Pohoreski <michael.pohoreski@gmail.com>
First post2017-08-26 09:23 -0700
Last post2017-08-28 21:24 -0700
Articles 5 — 3 participants

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  Origin of TEMPOP $2E ? Michael Pohoreski <michael.pohoreski@gmail.com> - 2017-08-26 09:23 -0700
    Re: Origin of TEMPOP $2E ? "James Davis" <JPD.Enterprises@Live.com> - 2017-08-26 16:38 -0700
      Re: Origin of TEMPOP $2E ? Michael Pohoreski <michael.pohoreski@gmail.com> - 2017-08-28 07:15 -0700
        Re: Origin of TEMPOP $2E ? gids.rs@sasktel.net - 2017-08-28 14:30 -0700
          Re: Origin of TEMPOP $2E ? Michael Pohoreski <michael.pohoreski@gmail.com> - 2017-08-28 21:24 -0700

#3841 — Origin of TEMPOP $2E ?

FromMichael Pohoreski <michael.pohoreski@gmail.com>
Date2017-08-26 09:23 -0700
SubjectOrigin of TEMPOP $2E ?
Message-ID<a259f773-36e0-4705-bcf4-ad4d19d4ce1f@googlegroups.com>
AppleWin includes this symbol:

002E MASK/TEMPOP

Obviously the first part, MASK, is the GR pixel mask used for plotting ...

                36   MASK     EQU   $2E

F800: 4A        102  PLOT     LSR              ;Y-COORD/2
F801: 08        103           PHP              ;SAVE LSB IN CARRY
F802: 20 47 F8  104           JSR   GBASCALC   ;CALC BASE ADR IN GBASL,H
F805: 28        105           PLP              ;RESTORE LSB FROM CARRY
F806: A9 0F     106           LDA   #$0F       ;MASK $0F IF EVEN
F808: 90 02     107           BCC   RTMASK
F80A: 69 E0     108           ADC   #$E0       ;MASK $F0 IF ODD
F80C: 85 2E     109  RTMASK   STA   MASK
F80E: B1 26     110  PLOT1    LDA   (GBASL),Y  ;DATA
F810: 45 30     111           EOR   COLOR      ; EOR COLOR
F812: 25 2E     112           AND   MASK       ;  AND MASK
F814: 51 26     113           EOR   (GBASL),Y  ;   EOR DATA
F816: 91 26     114           STA   (GBASL),Y  ;    TO DATA
F818: 60        115           RTS


... but does anyone know where the symbol TEMPOP comes from?  A little google-fu reveals nothing. :-/

As far as I can tell it looks like someone was trying to describe FORMAT from Apple //c Reference Manual Vol 2

42 FORMAT EQU $2E ;temp for opcode decode 
43 LENGTH EQU $2F ;temp for opcode decode 

F8A9: AA        200  GETFMT   TAX
F8AA: BD A6 F9  201           LDA   FMT2,X     ;INDEX INTO PRINT FORMAT TABLE
F8AD: 85 2E     202           STA   FORMAT     ;SAVE FOR ADR FIELD FORMATTING

Doesn't look like it is worth keeping ... unless someone can shed some more light on this one.

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#3842

From"James Davis" <JPD.Enterprises@Live.com>
Date2017-08-26 16:38 -0700
Message-ID<ont0pd$1o0h$1@gioia.aioe.org>
In reply to#3841
Hi MP,

This routine in the Apple IIe Technical Reference Manual (pgs. 
334-335) firmware listing starts-ends at $F882-$F8B6.  It looks 
like it checks the validity of opcodes.

James Davis

"Michael Pohoreski"  wrote in message 
news:a259f773-36e0-4705-bcf4-ad4d19d4ce1f@googlegroups.com...

AppleWin includes this symbol:

002E MASK/TEMPOP

Obviously the first part, MASK, is the GR pixel mask used for 
plotting ...

                36   MASK     EQU   $2E

F800: 4A        102  PLOT     LSR              ;Y-COORD/2
F801: 08        103           PHP              ;SAVE LSB IN CARRY
F802: 20 47 F8  104           JSR   GBASCALC   ;CALC BASE ADR IN 
GBASL,H
F805: 28        105           PLP              ;RESTORE LSB FROM 
CARRY
F806: A9 0F     106           LDA   #$0F       ;MASK $0F IF EVEN
F808: 90 02     107           BCC   RTMASK
F80A: 69 E0     108           ADC   #$E0       ;MASK $F0 IF ODD
F80C: 85 2E     109  RTMASK   STA   MASK
F80E: B1 26     110  PLOT1    LDA   (GBASL),Y  ;DATA
F810: 45 30     111           EOR   COLOR      ; EOR COLOR
F812: 25 2E     112           AND   MASK       ;  AND MASK
F814: 51 26     113           EOR   (GBASL),Y  ;   EOR DATA
F816: 91 26     114           STA   (GBASL),Y  ;    TO DATA
F818: 60        115           RTS


... but does anyone know where the symbol TEMPOP comes from?  A 
little google-fu reveals nothing. :-/

As far as I can tell it looks like someone was trying to describe 
FORMAT from Apple //c Reference Manual Vol 2

42 FORMAT EQU $2E ;temp for opcode decode
43 LENGTH EQU $2F ;temp for opcode decode

F8A9: AA        200  GETFMT   TAX
F8AA: BD A6 F9  201           LDA   FMT2,X     ;INDEX INTO PRINT 
FORMAT TABLE
F8AD: 85 2E     202           STA   FORMAT     ;SAVE FOR ADR 
FIELD FORMATTING

Doesn't look like it is worth keeping ... unless someone can shed 
some more light on this one.

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#3851

FromMichael Pohoreski <michael.pohoreski@gmail.com>
Date2017-08-28 07:15 -0700
Message-ID<62ee08c4-0a29-418a-94af-9d1c7ef32615@googlegroups.com>
In reply to#3842
On Saturday, August 26, 2017 at 4:38:25 PM UTC-7, James Davis wrote:
> Hi MP,
> This routine in the Apple IIe Technical Reference Manual (pgs. 
> 334-335) firmware listing starts-ends at $F882-$F8B6.  It looks 
> like it checks the validity of opcodes.

Thanks for the link.

Ah, there are 2 versions of the Apple IIe TRM:

1985, ISBN: 0-201-17720-X
* http://www.applelogic.org/files/AIIETECHREF1.pdf

1987, ISBN: 0-20-17750-1
* ftp://ftp.apple.asimov.net/pub/apple_II/documentation/hardware/machines/Apple%20IIe%20Technical%20Reference%20Manual.pdf

I see you are referring to the 1987 version.  There is NO mention of TEMPOB on pages 333 - 334.

James, since I wasn't clear before:

Does anyone know _where_ the _symbol_ TEMPOB is defined and used?

Michael

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#3855

Fromgids.rs@sasktel.net
Date2017-08-28 14:30 -0700
Message-ID<032b54d4-0f30-4022-8e8f-daf31f260b7f@googlegroups.com>
In reply to#3851
On Monday, August 28, 2017 at 8:15:09 AM UTC-6, Michael Pohoreski wrote:
> On Saturday, August 26, 2017 at 4:38:25 PM UTC-7, James Davis wrote:
> > Hi MP,
> > This routine in the Apple IIe Technical Reference Manual (pgs. 
> > 334-335) firmware listing starts-ends at $F882-$F8B6.  It looks 
> > like it checks the validity of opcodes.
> 
> Thanks for the link.
> 
> Ah, there are 2 versions of the Apple IIe TRM:
> 
> 1985, ISBN: 0-201-17720-X
> * http://www.applelogic.org/files/AIIETECHREF1.pdf
> 
> 1987, ISBN: 0-20-17750-1
> * ftp://ftp.apple.asimov.net/pub/apple_II/documentation/hardware/machines/Apple%20IIe%20Technical%20Reference%20Manual.pdf
> 
> I see you are referring to the 1987 version.  There is NO mention of TEMPOB on pages 333 - 334.
> 
> James, since I wasn't clear before:
> 
> Does anyone know _where_ the _symbol_ TEMPOB is defined and used?
> 
> Michael


Since you just retyped it as a spelling mistake  :0)
I would go along with your first assumption that someone meant to type FORMAT but had TEMPOP in their head for temporary operation.

You say this is an Applewin symbol?  Does that mean this symbol is part of Applewin and if so, then it may not be in the Apple IIe TRM?

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#3858

FromMichael Pohoreski <michael.pohoreski@gmail.com>
Date2017-08-28 21:24 -0700
Message-ID<21e84139-4b1c-41d2-a32d-cb020dc33805@googlegroups.com>
In reply to#3855
On Monday, August 28, 2017 at 2:30:38 PM UTC-7, gid...@sasktel.net wrote:

> Since you just retyped it as a spelling mistake  :0)

DOH. Oh the irony. :-)


> I would go along with your first assumption that someone meant to type FORMAT but had TEMPOP in their head for temporary operation.

That's what I'm thinking.
 
> You say this is an Applewin symbol? 

Yes, it was in APPLE2E.SYM

I've removed (*) it for the next version of AppleWin.
https://github.com/AppleWin/AppleWin/issues/484

(*) Technically renamed it to: F8.MASK

> Does that mean this symbol is part of Applewin and if so, then it may not be in the Apple IIe TRM?

From what little I've read of the TRM I don't see it.  I'll spend some more time this week to double check but I won't be holding my breath.

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