Re: Project: Tangerine: Emulation with a twist

["John B. Matthews" <nospam@nospam.com>]

In article 
<Pine.LNX.4.62.0510110223220.19647@static-141-149-129-16.buff.east.veriz
on.net>,
 Lyrical Nanoha <LyricalNanoha@dosius.net> wrote:

[...]
>    1. The location of the code in the //e ROM to flash the cursor.
> 
> I need to reroute this code into native space so I can make the cursor 
> flash on the Tangerine screen (which is currently not in the Apple memory 
> space).

On the original II, the character where the "cursor" is located is set 
to flash by clearing bit 7 and setting bit 6. The actual flashing is 
done in hardware:

FD0C: A4 24     754  RDKEY    LDY   CH
FD0E: B1 28     755           LDA   (BASL),Y   ;SET SCREEN TO FLASH
FD10: 48        756           PHA
FD11: 29 3F     757           AND   #$3F       ;CLEAR BITS 6 & 7
FD13: 09 40     758           ORA   #$40       ;SET BIT 6
FD15: 91 28     759           STA   (BASL),Y
FD17: 68        760           PLA
FD18: 6C 38 00  761           JMP   (KSWL)     ;GO TO USER KEY-IN

>    2. Where the default PEEK(33) is set to 40.

FB4B: 85 22     512  SETWND   STA   WNDTOP     ;SET FOR 40 COL WINDOW
FB4D: A9 00     513           LDA   #$00
FB4F: 85 20     514           STA   WNDLFT
FB51: A9 28     515           LDA   #$28
FB53: 85 21     516           STA   WNDWDTH
FB55: A9 18     517           LDA   #$18
FB57: 85 23     518           STA   WNDBTM

-- 
John
jmatthews at wright dot edu
www dot wright dot edu/~john.matthews/