Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.sys.apple2.programmer > #2911

Re: Prodos8 2.0.3 info

Show all headers | View raw

On Thursday, August 11, 2016 at 8:31:45 AM UTC-7, Michael Pohoreski wrote:
> On Tuesday, August 9, 2016 at 8:43:37 PM UTC-7, John Brooks wrote:
> > P8 2.0.3 expects the first byte of LC bank 1 to be $C8 (CLD), and writes an $EE to the first byte of LC bank 2. It uses these ID bytes to determine which LC banks are active and restoring them on exit.
> 
> I see on page 220, file PROLDR, just after "see rev note #38" it does:
>     lda #$ee
>     sta $d000
>     jsr lc1in
> 
> Where is $C8 set ? I see this comment in REVISIONS
> 
> * 1. In the language card area, the $D000 areas overlay. To *
> * determine which bank is in requires that the main bank *
> * has a CLD instruction ($D8) at location $D000 and the *
> * alternate bank must not.

The first instruction of the 5.25 RWTS at $D000 LC1 contains a CLD. See source in XrwTot.n.

-JB
Twitter: @JBrooksBSI

Back to comp.sys.apple2.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-07-28 20:17 -0700
  Re: Prodos8 2.0.3 info Michael J. Mahon <mjmahon@aol.com> - 2016-07-31 00:07 -0500
    Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-07-30 22:26 -0700
      Re: Prodos8 2.0.3 info Oliver Schmidt <ol.sc@web.de> - 2016-07-31 09:26 +0000
        Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-07-31 08:25 -0700
          Re: Prodos8 2.0.3 info dempson@actrix.gen.nz (David Empson) - 2016-08-01 09:05 +1200
            Re: Prodos8 2.0.3 info Antoine Vignau <antoine.vignau@laposte.net> - 2016-07-31 22:56 -0700
            Re: Prodos8 2.0.3 info Oliver Schmidt <ol.sc@web.de> - 2016-08-01 12:29 +0000
              Re: Prodos8 2.0.3 info Antoine Vignau <antoine.vignau@laposte.net> - 2016-08-01 08:45 -0700
              Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-09 20:43 -0700
                Re: Prodos8 2.0.3 info Antoine Vignau <antoine.vignau@laposte.net> - 2016-08-09 22:50 -0700
                Re: Prodos8 2.0.3 info Oliver Schmidt <ol.sc@web.de> - 2016-08-10 07:12 -0700
                Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-10 08:52 -0700
                Re: Prodos8 2.0.3 info D Finnigan <dog_cow@macgui.com> - 2016-08-10 16:12 +0000
                Re: Prodos8 2.0.3 info gids.rs@sasktel.net - 2016-08-10 22:27 -0700
                Re: Prodos8 2.0.3 info gids.rs@sasktel.net - 2016-08-10 22:35 -0700
                Re: Prodos8 2.0.3 info Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 08:31 -0700
                Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-11 10:32 -0700
                Re: Prodos8 2.0.3 info Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-11 12:35 -0700
                Re: Prodos8 2.0.3 info qkumba <peter.ferrie@gmail.com> - 2016-08-12 09:24 -0700
                Re: Prodos8 2.0.3 info Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-12 10:08 -0700
  Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-13 21:37 -0700
    Re: Prodos8 2.0.3 info Antoine Vignau <antoine.vignau@laposte.net> - 2016-08-14 15:32 -0700
    Re: Prodos8 2.0.3 info Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-15 09:10 -0700
      Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-15 13:41 -0700
        Re: Prodos8 2.0.3 info Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-08-16 18:19 -0700
          Re: Prodos8 2.0.3 info geoff body <gbody4@bigpond.com> - 2016-08-17 07:49 -0700
            Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-17 10:04 -0700
    Re: Prodos8 2.0.3 info David Schmidt <schmidtd@my-deja.com> - 2016-08-15 13:45 -0400
      Re: Prodos8 2.0.3 info John Brooks <jbrooks@blueshiftinc.com> - 2016-08-15 13:49 -0700
        Re: Prodos8 2.0.3 info David Schmidt <schmidtd@my-deja.com> - 2016-08-15 17:36 -0400
        Re: Prodos8 2.0.3 info Oliver Schmidt <ol.sc@web.de> - 2016-08-16 09:56 +0000

csiph-web