Re: A//c 255ROM up to EPROM

[Riccardo <rigreco.grc@gmail.com>]

Il giorno giovedì 25 aprile 2013 21:38:55 UTC+2, gid...@sasktel.net ha scritto:
> On Thursday, 25 April 2013 09:35:53 UTC-6, Riccardo  wrote:
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> > Hi All,
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> > I now have original 255ROM (342-0272-A) and can start extenal 5,25 disk drive by PR#7 command;
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> > I wonder, if i update to 00 or 03 or 04 ROMs, i will have famous "smart ports", but how i can boot external disk drive? (if i'll type PR#7 see AppleTalk message)
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> > Thanks so much.
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> > Ric.
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> Smart Port is based on slot# 5.  So, PR#5 will access the first external drive.
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> The second daisy chained 3.5" drive will be Slot#5, Drive#2 which will depend if there is a Ram driver installed and if there is a ramcard in the IIc.
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> Otherwise, the second daisy chained drive will be slot#2, drive#1.
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> And the third drive is slot#2, drive#2.
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> Any 5.25" drives daisy chained to the external drives will still keep slot#6 but will be drive#2, whereas the internal 5.25" drive will still be slot#6, drive#1.
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> Rob

Thanks Rod, it is comforting :-)

Now i found an emulator of Apple IIc that work on ROM, i'll change original ROM 32K by insert few Bytes in free space and I'll see what happens.

Ric.