Re: UD3 ROM on a 3032

Hi Marko!

On Mon, Feb 6, 2017 at 7:17 AM, Marko Mäkelä <msmakela@gmail.com> wrote:
> On Sun, Feb 05, 2017 at 11:03:42PM +0100, Francesco Messineo wrote:
>>
>> Now the 3032 is stable for a few hours, it just crashed once while playing
>> with tape load/save, I don't know if a bad tape can solid crash a PET
>> anyway, it was in the searching phase.
>
>
> At least the Vic-20 and C64 can be crashed by a bad tape. I would expect the
> routines to be based on the PET ones, because during SAVE you can observe a
> similar amount of jitter in the signal. The tape routines on the 264 series
> (C16 and plus/4) are substantially different, and so is the tape format and
> even the connector.

my concern was about the crash during the searching phase. I don't
know if it's possible, but anyway, that PET was powered down for
probably 15 years and I've found it on a dumpster, so it's a good
start to get it working fine for hours.


>
> My C2N232 might be one more option, if you can find one second-hand.
> However, it relies on RS-232, which nowadays is mostly available via an
> unreliable USB converter. The c2nload utility would load a minimum-size
> loader (192 bytes tape header + 2 bytes payload to jump into the tape
> header) and then use that to load the actual payload at 38,400bps.

yes, I've seen your tape adapter. I have many computers (PCs even)
with RS-232, so it wouldn't be a problem. The real problem is it uses
an old micro AT90S2313. I have tons of ATtiny2313 instead, I've found
a firmware for the new microcontroller but I'm not sure about the
schematic getting modified or not. Sorry but the documentation about
C2N232 could be a bit better maybe :)
I've ended in making a PC64 cable that I use with cbmlink linux
software and it works great on VIC-20, C64, SX64 (no tape port there)
and the PET too. However, I still need a "local" mass-memory to allow
the PET to run without the PC cable connected.

Best regards
Frank

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