Re: Problems! Disk ][ drive just whirs and whirs; IIc monitor knob stuck; IIe enhanced not...

[David Wilson <mcs6502@gmail.com>]

On Apr 30, 2:35 am, Gregory Weston <u...@splook.com> wrote:
> Not sure about the queickestway to check the CPU.

Try booting ProDOS 8 v2.0.x - it will fail to boot on a 6502.

> For the ROM, check address fbc0 (64448). On an original //e it's $EA and
> on an enhanced it's $E0, and that's the Apple-recommended way to tell
> the difference in code between those two machines specifically so it had
> better be reliable.

The ROMs should be marked 342-0134 and 342-0135 on an unenhanced IIe
while an enhanced IIe will have 342-0303 and 342-0304.

> You can see MouseText with this (typed with slight modifications from
> the users' guide):
>
> 10 PRINT CHR$(4); "PR#3: INVERSE
> 20 PRINT CHR$(27); "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_"; CHR$(24)
> 30 NORMAL

Missing " after the PR#3 and this requires that DOS/ProDOS be booted.
Easier to use:

10 PR#3 : PRINT : REM prevent screen from clearing to inverse spaces
15 INVERSE

See my Wikipedia entry on MouseText for images of the characters.