A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.
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Disclaimer
Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
CP/M
Z80 + ATMega644 as CP/M Boot Loader
6. March 2011 - 19:40 — adminWhy to prepare an address decoder for specific regions to switch between RAM and ROM? You can use 64kB SRAM chip for the whole space, kickstarted by ATMega. The way shows Ben Ryves.
Emulating a Z80 CP/M computer on ATMega88
30. April 2010 - 11:21 — adminYes, we all know many emulators of old processors "on the chip", but as far as I remember this is the first attempt to emulate a CP/M machine (including Z80) I ever seen.
Breadboard CP/M
11. April 2010 - 13:17 — adminA simple CP/M system fits in breadboard nowadays. Look at Grant's Work-in-progress version.
Photo: Grant Searle
QP/M
24. May 2009 - 18:18 — adminSomething nostalgic: QP/M is a time/date stamping and speedy CP/M 2.2 replacement that fits in the same memory space.
P112
22. January 2009 - 18:16 — adminAn older "homebrew" computer based on Zilog Z80182 (upgraded Z180) for inspiration.
Z80 code bits from MICROCode
11. December 2008 - 23:32 — adminSome old software from MICROCode for your CP/M computers
A lot of reading
25. November 2008 - 20:27 — adminOld magazines, old OS, old games source code, all's old today.
