DRAMBOARD V1.2 – 4164/41256 DRAM chip tester
Test memory chips for the C64 (breadbin) quick and easy! 8x 4164 DRAM (8x8kB) are used in older C64:s.
Arduino Nano-based DRAM (Dynamic RAM) tester for 4164* and 41256** type DRAM chips.
User manual: http://docs.anemo.se/dramboard-manual.pdf (right-click to save)
Availability: SOLD OUT - no new batch planned in near future
Four loops with four memory verify tests are run:
1. Fill with ones
2. Fill with zeros
3. Fill with alternating ones and zeros
4. Fill with alternating zeros and ones
• Test time, 4164: 40 seconds
• Test time, 41256: 1 minute, 45 seconds
• Duo color status LED:
Green - Init & passed all tests
Yellow/orange - tests running
Red (blinking) test failed
• Arduino current supply overcurrent protection (Polymer PTC self-resettable fuse)
• Arduino output pins overcurrent protection (current limiting resistors, new for v1.2)
• Serial monitor (9600 bauds)
Pre-programmed Arduino Nano (socketed) and 30 cm mini-USB cable included. DRAM chip in pictures is NOT included
Note! 4164 chips detected as working/defective has been verified in real C64. 41256 test mode is BETA as I haven't had the opportunity to test chips from multiple manufacturers. Tests are not 100% accurate (timing wise) and should be seen as an good indication.
PRICE & PAYMENT:
€31.5 including international UNTRACKED shipping
€39 including TRACKED shipping
Payment as gift via Paypal
Drivers for the CH340 chipset is needed for serial communication: https://sparks.gogo.co.nz/ch340.html
- - -
Image above shows v1.0
*4164 DRAM cross reference:
MB8264-15 (Fairchild)
MB8264A-15 (Fujitsu)
HM4864, HYB4164P2BD (Hitachi)
M3764A-15 (OKI)
MT4264-25 (Micron)
M5K4164AP-15, M5K4164 ANP-10 (Mitsubishi)
MK4564N-20 (Mostek)
MCM4164BP15, MCM6665BP20, MCM6665AP (Motorola)
D4164C-2, D4164C-15, uPD 4164-1 (NEC)
KM4164B-15 (Samsung)
TMM4164 C-3, TMS4164-15NL, TMS4164-20NL (Toshiba)
**41256 DRAM cross reference:
TMS4256 (Toshiba)
MCM6256 (Motorola)
HM51256 (Hitachi)
MB81256 (Fujitsu)
HYB41256 (Siemens)
KM41256 (Samsung)
MSM41256 (OKI)
uPD41256 (NEC)
The boards are also sold elsewhere!
Test memory chips for the C64 (breadbin) quick and easy! 8x 4164 DRAM (8x8kB) are used in older C64:s.
Arduino Nano-based DRAM (Dynamic RAM) tester for 4164* and 41256** type DRAM chips.
User manual: http://docs.anemo.se/dramboard-manual.pdf (right-click to save)
Availability: SOLD OUT - no new batch planned in near future
Four loops with four memory verify tests are run:
1. Fill with ones
2. Fill with zeros
3. Fill with alternating ones and zeros
4. Fill with alternating zeros and ones
• Test time, 4164: 40 seconds
• Test time, 41256: 1 minute, 45 seconds
• Duo color status LED:
Green - Init & passed all tests
Yellow/orange - tests running
Red (blinking) test failed
• Arduino current supply overcurrent protection (Polymer PTC self-resettable fuse)
• Arduino output pins overcurrent protection (current limiting resistors, new for v1.2)
• Serial monitor (9600 bauds)
Pre-programmed Arduino Nano (socketed) and 30 cm mini-USB cable included. DRAM chip in pictures is NOT included
Note! 4164 chips detected as working/defective has been verified in real C64. 41256 test mode is BETA as I haven't had the opportunity to test chips from multiple manufacturers. Tests are not 100% accurate (timing wise) and should be seen as an good indication.
PRICE & PAYMENT:
€31.5 including international UNTRACKED shipping
€39 including TRACKED shipping
Payment as gift via Paypal
Drivers for the CH340 chipset is needed for serial communication: https://sparks.gogo.co.nz/ch340.html
- - -
Image above shows v1.0
*4164 DRAM cross reference:
MB8264-15 (Fairchild)
MB8264A-15 (Fujitsu)
HM4864, HYB4164P2BD (Hitachi)
M3764A-15 (OKI)
MT4264-25 (Micron)
M5K4164AP-15, M5K4164 ANP-10 (Mitsubishi)
MK4564N-20 (Mostek)
MCM4164BP15, MCM6665BP20, MCM6665AP (Motorola)
D4164C-2, D4164C-15, uPD 4164-1 (NEC)
KM4164B-15 (Samsung)
TMM4164 C-3, TMS4164-15NL, TMS4164-20NL (Toshiba)
**41256 DRAM cross reference:
TMS4256 (Toshiba)
MCM6256 (Motorola)
HM51256 (Hitachi)
MB81256 (Fujitsu)
HYB41256 (Siemens)
KM41256 (Samsung)
MSM41256 (OKI)
uPD41256 (NEC)
The boards are also sold elsewhere!
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