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Products -> BALLY Repros
Produktabbildung / product photo

MALLY RAM Tester for RAM 6810, 5101, 6116 and more

Bedienungsanleitung / Manual

The simply designed low parts count PCB contains an AVR ATmega16/32, a TEXTOOL socket, 2 LEDs, 3 transistors, 1 button and a couple passive components. The RAM Tester can test 6810, 5101, 2101, 6116 or compatible and comes as kit or fully assembled incl. battery pack.

While the test performes read/write cycles on every memory cell and checks functionality of all CHIP SELECT inputs, the device CANNOT check the speed limits of the RAM under test. The device is easily operated by a single button navigation. Each keystroke results in an action visualized by the 2 LEDs.

Put the device in front of you so you can read the string on the upper side of the PCB. This means the LEDs are on the upper right and the TEXTOOL socket located on the upper left. Below you can see the 40-pin microcontroller. All references to locations refer to the described orientation of PCB.

Put the RAM chip in the TEXTOOL socket with the notch facing left. Align RAM most left. Do not bend any pins. Make sure all pins are properly seated. Flip the socket lever to lock the chip. Double check the orientation. Reversed insertion will most likely destroy the RAM under test instantly, however, the test device cannot be damaged by any RAM chip inserted, neither defective nor misplaced.

Now provide power to the device by connecting the battery holder equipped with four 1.2 volts AA batteries to the battery clip connector. Alternatively you may use any stabilized and smoothed +5V DC power supply but NOTE: Applying wrong or reversed voltage may instantly destroy the test device. Spikes and surges from switching power supplies may result in unpredictable behaviour of the RAM Tester, thus, eventually showing unreliable test results.

beide LEDs blinken
fig. 1

Both LEDs start blinking simultaneously (fig. 1) when the device was powered. To select the RAM type press the button and keep it pressed.

LEDs blinken abwechselnd
fig. 2

While pressing the button the LEDs start toggling (green, red, both, green, red,both...) (fig. 2). To test a 5101 release the button while the green LED was lit, for a 6810 just release while the red LED was lit. For 6116, 5116 or 6516 release, when both LEDs were lit.

NOTE: Do not proceed in the case of wrong selection, as the test results won't be trustworthy on any circumstances. Again, selecting the wrong RAM type won't damage the test device but may destroy the RAM under test. Reboot the device by powering off and on again. Now make the proper selection.

gruene LED blinkt
fig. 3

The device confirms your selection by blinking the selected LED only. Assuming we selected a type 5101, the green LED will blink (fig. 3).

When done, press the button to run the test. Depending on the selected device the corresponding LED starts rapid blinking.Finally the test result is indicated by either the green LED (tested good) or the red LED (test failed).

When we tested the board, we had a known bad 5101, which have had a thermal problem, quitting operation after around 10 minutes under power. To address such problems we implemented a procedure allowing to run indefinite tests. To enable long term testing just keep the button pressed for at least 3 seconds before starting the test run. Now the test program runs until the button was pressed again OR the test failed.

Press the button to go back to the selection menu or power off to remove the RAM under test.

CAUTION: We always recommend to power the device off when inserting or removing a RAM chip. However, we never succeeded to destroy a chip, when hot plugged. On the other hand it is easy to destroy a 5101 by static electricity (we wasted alot during developement :-), so ground yourself before touching any pins of the RAM under test.

The devices functionality results from cool software rather than complicated hardware, so the range of RAM able to be tested may be extended in the future.

beide LEDs blinken
fig. 4

Programming Pinout:
// ----------x +5V
// ----------o SCK
// ----------o MOSI
// ----------o MISO
// ----------o RESET/
// ----------x GND
// ---------- n.c
// ---------- n.c

For those who are able to programm the microcontroller on the PCB the programming pins (MISO,MOSI,SCK,RESET,+5V & GND) are routed to solder pads (fig. 4) allowing the connection to a generic AVR programmer. The latest software can be supplied on demand. The recent version is 2.20. Check against the version label on your module.

The latest revision also checks: 2016, 2116, 5116, 5126, 5256, 5517, 58725

RAM Tester Arcade / Flipper
RAM Checker Arcade /Pinball

content/quantity: 1

Art.-Nr.: 102778

price: 47.95
incl. vat, excl. shipping [Shipping conditions]

Bedienungsanleitung / Manual