本帖最后由 chunk 于 2010-8-4 09:53 编辑
http://6502.org/users/dieter/
这个页面上有4个CPU，其中一个“MT15”的是全晶体管的，其它似乎是74系列IC搭的吧。
纠正一下，MT15部分使用了74系列IC：
MT15 is a (mostly) transistorised CPU.
"Mostly" means, that 74xx chips are used in three places:
74LS164/74LS27 is used to generate the 4_phase_clock,
instruction decoder outputs are buffered with four 74HCT245,
and another four 74HCT245 work as buffer for the 16 Bit
address and data bus.
Everything else (Registers, Flags, ALU, instruction decoder etc.)
was built with BC847/BC857 low_frequency_transistors,
running with a 2.5 Volt supply.
Maximum power dissipation is around 13W (low power).
500 kHz 4_phase_clock, means a 2 us cycle, instructions
take 2 to 6 cycles.
Address range is 64 kWords (128 kBytes).
Contains circa 3000 low_frequency transistors, 3 EuroCents each.
(BC847/BC857 is a SMD_version of the well known BC547/BC557)
"Borrowed" CRT and Keyboard interface from my old M02 project. |
