Table-based version

Directory /pub/cbm/documents/projects/memory/plus4/

Memory expansions for the Commodore 264 Series

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c16-to-1MB.gif

Control logic for expanding the Commodore 16 or plus/4 to 1 megabyte of internal memory (four 256k banks).

epromexp.zip

Schematic diagrams (in German) and instructions (in English) for building an EPROM expansion of up to 1.5 megabytes. H.Lux 01.07.1991.

expinstr.zip

Two 1541 disk images containing
- 256kB RAM expansion hannes and update v1
- EPROM expansion
- circuits and sheets for practical realisation. Note: texts are in German; some 256kb-programs on disk

os96_9b.zip

1551 floppy emulator for MS-DOS; uses a cable between the plus/4 and the parallel port of the PC. Includes two EPROM images for the plus/4. Features: datalink to PC, setup utility with SRAM card or expansion, printer driver, floppy wedge, hardware check

p4-expanded-bottom.jpg

A plus/4 circuit board with all OS96 expansions; bottom view

p4-expanded-top.jpg

A plus/4 circuit board with all OS96 expansions; top view

ram256kb.zip

A 256 kB RAM expansion for the plus/4 (Hannes/Solder/CSORY)

sram.zip

All you need to build the 384 kB SRAM expansion in your plus/4. Hand drawn and scanned schematic diagrams with German descriptions

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