64 lines
2.3 KiB
Plaintext
64 lines
2.3 KiB
Plaintext
RAM2GS II (GW4201D) expands the Apple IIgs's
|
|
fast memory to 8 MB.
|
|
|
|
|
|
Low-Power, SDRAM-Based Design
|
|
----------------------------------------
|
|
Thanks to a modern, low-power design,
|
|
RAM2GS II uses a maximum of 0.15 watts when idle
|
|
(30 mA @ 5V) and 0.3W in active use (60 mA @ 5V).
|
|
Unlike other IIgs expansion RAM cards, which are
|
|
built with vintage asynchronous DRAM chips,
|
|
RAM2GS II uses modern SDRAM. This design allows for
|
|
low power consumption and improved reliability
|
|
over other memory cards using 15+ year old chips.
|
|
|
|
|
|
Small Size, Low-Profile
|
|
----------------------------------------
|
|
RAM2GS II features a small board outline and is the
|
|
thinnest Apple IIgs expansion memory card ever produced,
|
|
at under 4mm thin. Small and thin dimensions improve
|
|
the mechanical compatibility between RAM2GS II and
|
|
peripheral cards installed into the IIgs's Slot 7.
|
|
|
|
|
|
Adjustable Capacity, Highly Compatible
|
|
----------------------------------------
|
|
The Apple IIgs can utilize up to 8 MB of fast memory,
|
|
but due to limitations of the Apple IIgs hardware,
|
|
not all 8 MB is considered "DMA-compatible."
|
|
Only 4 MB of the 8 MB provided by an expansion RAM
|
|
card such as the RAM2GS II is DMA-compatible,
|
|
and peripheral cards which use DMA are
|
|
not able to access expansion memory beyond 4 MB.
|
|
RAM2GS II implements an adjustable capacity
|
|
feature, allowing the user to select between
|
|
fully DMA-compatible 4 MB capacity, or
|
|
partially DMA-compatible 8MB capacity.
|
|
Capacity settings can be set temporarily
|
|
or saved in nonvolatile memory.
|
|
The capacity adjustment utility is available on
|
|
_RAM2GS II's support page_.
|
|
|
|
|
|
Ecologically Friendly, Gold-Plated PCB
|
|
----------------------------------------
|
|
RAM2GS II features a lead-free, ENIG gold-plated,
|
|
4-layer PCB and is fully EU RoHS-compliant.
|
|
All units are tested extensively before shipment.
|
|
Only new parts are used to build RAM2GS II,
|
|
and all RAM2GS II cards are manufactured in our
|
|
semi-automated facility in Columbus, Ohio,
|
|
in the United States.
|
|
|
|
|
|
Open-Source Design
|
|
----------------------------------------
|
|
RAM2GS II's design is fully open-source.
|
|
The schematics, board layouts, CPLD firmware,
|
|
and utility software are all freely available
|
|
for commercial and noncommercial use.
|
|
To download the design files, visit the
|
|
_Garrett's Workshop GitHub page_.
|