AppleIISd

SD card based ProFile replacement for enhanced Apple IIe computers

The AppleIISd is an SD card based replaced for the ProFile harddrive. In contrast to other SD card based cards this card does not replace a Disk II drive. Data is saved directly onto the SD card, it is not via images on a FAT system, like on other cards. The SD card is read- / writable with CiderPress.

A CPLD is used as a SPI controller and translates, together with the ROM driver, SD card data to/from the Apple IIe.

The assembler sources are written in Merlin-8.

Features

up to 128MB storage space (4x 65535 blocks), currently 32MB
ProDOS driver in ROM
Auto boot
Access LED
Write protect sensing (not yet)
Card detect sensing (not yet)

Requirements

The AppleIISd requires and has been tested on an enhanced IIe computer. The ROM code uses some 65c02 opcodes. ProDOS versions 1.1 to 2.4.1 seem to work.

TODOs

Support more than one partition
Implement card detect and write protect sensing
Use 7MHz clock as SPI clock

1.1 KiB Raw Blame History

AppleIISd

Features

Requirements

TODOs

1.1 KiB

Raw Blame History