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This kit contains 3 empty PCBs and all parts (sockets, pins and passive components) to help you build a 32k RAM/ROM - Z80 based system. The kit does not contain ICs This kit may be suitable for those…
Read More…You may wonder why this kit only has 3 modules (PCBs) while comparable systems have 5 PCBs. The reason is that I have combined several functions on one module but still maintaining the same functionality. Actually, this kit has some advantages like reducing the number of modules, improves the reliability of the system and save slots on the backplane. Mounting the crystal on both the serial and the CPU modules improves the reliability further of the system, but enables also the CPU to run at a different or higher clock speed then the serial chip (up to 20Mhz if your Z80 CPU can handle it).
31e Serial MC68B50P ACIA and clock module (rec. 7.3728Mhz)
41d Memory Module; 32kb RAM + banked 8 x 8kb ROM
33g Serial MC68B50P ACIA and clock module (rec. 7.3728Mhz)
45d Memory Module; 128 RAM (only 64k used) + 64k ROM (only 32k used)
the kit contains; 74HCT00, 74HCT02, 74HCT138 (2x), 64k ROM chip, 128k RAM chip you need to provide the Z80 cpu, 68B50 acia and two 74HCT32
You find more information about this and other modules at my homepage www.z80.no. Here you also find troubleshooting guides. You can also send me a message if you have any questions.
If you think the problem is with the backplane, here is one product which may help SC112 Modular Backplane If you have problems with the serial connection, a reliable serial-USB is also available here.
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Cody | July 20, 2020
John | July 7, 2019
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Bergen, Bergen, Norway
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