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Results tagged with z80
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user 13762
The Zilog Z80 microprocessor. Prefer [game-boy] instead for questions about the Game Boy CPU nicknamed the ‘GBZ80’.
13
votes
Decoding Logic and Memory Systems for 8-bit computer - 64K address space
In Z80 designs, the ROM/PROM/EPROM/EEPROM is usually placed starting at 0x0000 since when you do a RESET, the Z80 starts executing at 0x0000 and you usually want to have your program start there. …
- 3,057
6
votes
From an electrical and software engineering perspective, ignoring available software, should...
Having designed systems using both the Z80 and 6502/65C02 I can tell you that they are quite similar and some have even designed systems having BOTH where you could switch between one and the other. … In the old days where DRAM was preferred due to cost, the Z80 made life simpler with its on-board DRAM refresh logic. …
- 3,057
10
votes
Did underclocking the early Z80 chips improve yield?
I'm not familiar with the specific design of the TRS-80 but there are at least two reasons I can think of that they may have used a 1.774 MHz clock vs. something else:
They may have received a "deal" …
- 3,057
30
votes
Accepted
How did old computers address far more than 64K of memory despite only having a 16 bit addre...
I don't know details of the Sharp PC-G830 specifically but the technique used to address more than 64K with a 16-bit address bus is called "bank switching".
This involves setting up some portions of m …
- 3,057