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Total: 6 results found.

... CPU board.  To debug the machine I needed it to run some known software. An easy replacement for a 2708 is a 28C16 EEPROM with a home made adaptor.  As shown in the diagram below they are ...
... net) but worked around the problem by building an adaptor for a 28C16 EEPROM.  28C16 EEPROM in 2708 Adaptor With the 28C16 installed I could see activity on the /CS pin (pin 11) of ...
... (IC1,IC2,IC3,IC4) 1 x 62256 32K Static RAM (IC5) 1 x 28C16 EEPROM (IC6 - Optional) 1 x 22V10 GAL (IC7) 1 x 18F13K22 (IC8) 8 x 0.1uf Ceramic Caps (C1,C2,C3,C4,C5,C6,C7,C8) ...
The Kaypro / FreHD adaptor uses a 28C256 EEPROM chip that contains multiple ROM images.  The active image is controlled by jumpers on the high address lines.   The challenge I had ...
... pin header problem was solved using headers from eBay and offsetting the header that connects to the Kaypro PCB socket from the sockets on the shim where the Z80 and 28C256 EEPROM are installed.  ...
... FT-817 and came to the horrible realization that it reads many "undocumented" EEPROM locations to work out all sorts of things that the officially documented commands may not provide.   This ...

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jaquinn@ihug.co.nz http://twitter.com/jaquinn