Caple C871i Manual de usuario descargar pdf (Pagina 10)

100

101

Apple II Computer Info

If you have a multi-bank auxiliary slot RAM card (such as a RamWorks)

there is an additional register, usually at $C073, which selects a bank

on the card. This bank then replaces auxiliary memory in the addressing

mechanisms of the IIe. I think that the 80-column video buffers only

exist in bank 0 of a multi-bank auxiliary slot card.

> I'm use to using the apple ][+ with language card...so, could somebody

> please explain

> all the memory bank switching and all the new I/O soft switches in the ][e.

There are a lot of new soft switches: the IIe has every location in

$C000-$C01F used for something (in addition to the keyboard functions

which affect all these locations).

The $C000-$C00F switches are write-only (reading gives you the keyboard

latch). The $C010-$C01F switches are read-only, and only bit 7 is

significant (bits 0-6 are the last key value).

$C000-$C00F READ Keyboard buffer and latch flag in bit 7 (as ][/][+)

$C000 WRITE 80STORE OFF

$C001 WRITE 80STORE ON

$C002 WRITE RDMAIN

$C003 WRITE RDAUX

$C004 WRITE WRMAIN

$C005 WRITE WRAUX

$C006 WRITE SLOTCXROM

$C007 WRITE INTCXROM

$C008 WRITE MAINZP

$C009 WRITE AUXZP

$C00A WRITE INTC3ROM

$C00B WRITE SLOTC3ROM

$C00C WRITE 80VID OFF

$C00D WRITE 80VID ON

$C00E WRITE PRICHARSET

$C00F WRITE ALTCHARSET

$C010-$C01F WRITE Reset keyboard latch

$C010 READ Keyboard buffer, any-key-down flag in bit 7, reset latch

$C011 READ RDLC2 Read language card bank 2 enable

$C012 READ RDLCRD Read language card read enable

$C013 READ RDRAMRD Read main/aux read select

$C014 READ RDRAMWR Read main/aux write select

$C015 READ RDCXROM Read slot/internal CX ROM select

$C016 READ RDAUXZP Read main/aux zero page and language card select

$C017 READ RDC3ROM Read slot/internal C3 ROM select

$C018 READ RD80STO Read 80-column store enable

$C019 READ RDVBL Read vertical blanking

$C01A READ RDTXT Read text/graphics enable

$C01B READ RDMIX Read full/mixed screen select

$C01C READ RDP2 Read page1/page2 select

$C01D READ RDHIRES Read hires/lores select

$C01E READ RDCHARSET Read primary/alternate character set select

$C01F READ RD80VID Read 80-column video enable

The SLOTCX/INTCX switch determines whether $C100-$C2FF and $C400-$C7FF

access slot ROM space or the internal ROM. The internal ROM contains

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 10 of 572

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 571 572

Caple C871i Manual de usuario Pagina 10

Comentarios a estos manuales

Caple C871i Manual de usuario Pagina 10

Comentarios a estos manuales

Relacionado con productos y manuales para Placas Caple C871i