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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’.
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
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
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
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