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Acculogic SIMMply-RAM

@70DC.ADF ACCULOGIC SIMMply-RAM FOR THE PS/2-16
C70DC.ADF Description Program for @70DC.ADF

@7E7F.ADF ACCULOGIC SIMMply RAM for the PS/2 (16-bit card)
C7E7F.ADF Description Program for @7E7F.ADF
   Note: This may be only for the older card with 30-pin SIMMs.

@7EC0.ADF ACCULOGIC SIMMply RAM/32
C7EC0.ADF Description Program for @7EC0.ADF

Acu16_10.zip Acculogic SIMMply-RAM for the PS/2-16 Installation and Productivity Programs v1.0 (zipped image)
   70DCh ADF/ADP, Memory Manager, RAM Drive, Print Spooler, Disk Cache, Refdisk update (SC v2.04 + ADFs)
SIMMply_RAM.exe Acculogic SIMMply-RAM for the PS/2 Files (self-extracting archive)
   7E7Fh ADF/ADP, Memory Manager, RAM Drive, Print Spooler, Disk Cache
SIMMply_RAM_32.exe Acculogic SIMMply-RAM/32 for IBM PS/2 Files (self-extracting archive)
   7EC0h ADF/ADP, Memory Manager, RAM Drive, Print Spooler, Disk Cache, Refdisk update (SC v2.04 + POSTEXT.ADF)

Acculogic SIMMply-RAM for the PS/2-16 Quick Start Guide (1st Ed., Sep 1991)
Acculogic SIMMply-RAM for the PS/2-16 Reference Manual (1st Ed., Sep 1991)
Acculogic Software License Agreement

Early SIMMply-RAM/16 72-pin
Later SIMMply-RAM/16 72-pin
Early SIMMply-RAM/32 72-pin
Later SIMMply-RAM/32 72-pin
Dead DS1213 Battery
Specifications

Documentation scans and disk image provided by David Beem.

Early SIMMply-RAM/16 72-pin "110-00200" (photos by Alexandros Paterakis)

Seen on the box art. Similar to the later version below but with one additional jumper (0WS/1WS), voltage test points, and one less PAL.

Later SIMMply-RAM/16 72-pin "110-00200-00-B00" | (photos by Alexandros Paterakis)

Early SIMMply-RAM/32 72-pin "110-00110" (photos by Katherine Rohl)

Quite a few bodge wires.

Later SIMMply-RAM/32 72-pin "110-00212" (photo by Roman Klovdahl)

Three less PALs compared to the early revision. Discrete resistors replaced by four integrated resistor networks (top row).

Dead DS1213 Battery

> From Katherine Rohl (edited):

I just got an Acculogic SIMMply-RAM board (7EC0h) and was having a hell of a time getting it going. It turns out, the RAM at U5 is a 6116 mounted on a DS1213 SmartSocket with battery backup. The initializer program uploads an option ROM with the setup information into the board's SRAM. When the battery dies, the information is lost and POS doesn't know how to set the board up anymore until you re-run the configuration.

The 6116 is also used in pinball machines with battery backup. But the pin-compatible FRAM adapter didn't work when inserted into the smart socket.

> From Roman Klovdahl (edited):

It's a bit more complicated than with the usual Dallas modules we are used to. This contraption indeed has two batteries. During battery back-up time the battery with the highest voltage is selected for use. If one battery fails, the other will automatically take over.

New 3 V batteries of your liking can be connected to pin 2 and 7 on the Dallas chip. The two original batteries are soldered to the PCB and must be disconnected. If left connected, they will start to charge from the new batteries (and potentially leak and damage the card, if the potting fails to contain it).

At the very least, you have to desolder the module and poke two huge holes in the resin. [...] Lifting pin 2 and 7 to attach a battery on each pin would be possible but I can't see how this could be done without melting the socket.

Here are some pictures of the Dallas module without the resin:

And pictures of the hacked card (later SIMMply-RAM/32) and how to connect the new batteries:

Roman's video covering the DS1213 hack is available HERE.

Specifications (SIMMply-RAM/16, 72-pin SIMMs)

Supported Systems

PS/2 Models 50, 50Z, 55, 57, 60, 65 or any other 16-bit Micro Channel compatible system.

Memory Modes

Extended and/or expanded (EMS) memory.
EMS compatibility - LIM 4.0, LIM 3.2 on-board hardware support.

SIMM Compatibility

256Kx36 (1 MB), 512Kx36 (2 MB), 1Mx36 (4 MB), 2Mx36 (8 MB) IBM compatible (parity) 72-pin SIMMs.
1 MB, 2 MB, 4 MB or 8 MB modules can be mixed in any combination. Up to 32 MB.

From the PS/2-16 Quick Start Guide (modified):

The /32 probably supports 85/80 ns, 70 ns default: