Caple C871i Manual do Utilizador descarregar pdf (Página 470)

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Apple II Computer Info

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Path: ns-mx!uunet!wupost!waikato.ac.nz!comp.vuw.ac.nz!actrix!David.Empson

From: [email protected] (David Empson)

Newsgroups: comp.sys.apple2

Subject: Re: memory mapped locations ($0CXXX) needed for printer, serial ports.

Message-ID: <[email protected]>

Date: 31 Aug 91 14:39:48 GMT

References: <[email protected]>

Organization: Actrix Information Exchange, Wellington, New Zealand

Lines: 91

Comment-To: [email protected]

In article <[email protected]> [email protected] (Kevin Stanton) writes:

> I am attempting to use my Apple II+ as a printer buffer (serial in,

> parallel out). However, my Super Serial Card manual is rather sparse on

> details, as it is strictly a users manual.

I'm assuming you are using assembly language here.

Is this a real Apple Super Serial Card, or a clone of it? Even the

clone SSCs that I've seen come with a full manual.

> It gives certain entry points, but they are blocking, not polling.

Which entry points are these? The BASIC interface is entirely

blocking (JSR $Cn00 to set up, then use COUT and RDKEY to get or send

bytes). The Pascal interface's I/O calls are also blocking, but there

is a status call, which you can ask 'are you ready for output' and 'do

you have any input available'.

To confirm that your card has the Pascal interface, check the

following bytes (assuming the card is in slot 's'):

Signature bytes: $Cs05 = $38, $Cs07 = $18, $Cs0B = $01.

The entry points for the Pascal interface are contained in a lookup

table starting at $Cs0D. Each table entry contains the low byte of

the start address of the corresponding routine. The high byte is $Cs.

$Cs0D offset to INITIALIZE routine

$Cs0E offset to READ routine

$Cs0F offset to WRITE routine

$Cs10 offset to STATUS routine

For example, if $Cs0D contains the number $44, the initialize routine

starts at $Cs44.

All the routines must be called with X containing $Cs and Y containing

$s0 (e.g. $C2 and $20 for slot 2).

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 470 of 572

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Caple C871i Manual do Utilizador Página 470

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