Search found 4 matches

by picosecond
Fri Jun 26, 2020 5:20 pm
Forum: Hardware
Topic: 74HC374 D-Latch sets output without Clock
Replies: 11
Views: 1245

Re: 74HC374 D-Latch sets output without Clock

@Dr Jefyll will try the mod number 1.jpg. Thank you.
I would not recommend mod number 1.

The WDC 65C02 guarantees only 10ns of stable address after the falling edge of PHI2. This is parameter tAH in the datasheet, the address hold time.

You cannot guarantee a clean final clock to the '374s with ...
by picosecond
Wed May 06, 2020 10:04 pm
Forum: Emulation and Simulation
Topic: Extended 6502 Project (Logisim)
Replies: 126
Views: 31311

Re: Extended 6502 Project (Logisim)

why would the cylce times be a deal breaker?
It's not. For me, original 6502 cores are mainly interesting for emulating vintage systems. For these, exactly matching clocks/instruction matters. If I'm going to make something new I'll reach for a 65C02, discrete chip or FPGA core. If you prefer to ...
by picosecond
Wed May 06, 2020 6:52 pm
Forum: Emulation and Simulation
Topic: Extended 6502 Project (Logisim)
Replies: 126
Views: 31311

Re: Extended 6502 Project (Logisim)

(welcome, picosecond)
Also welcome, picosecond! I'm sorry your first post had to be on such a mess of a thread.
Thanks for the welcome, BigEd and Proxy. Sometime soon I will get off my duff and make a proper greeting in the Introduce yourself thread. Here is a one-liner: I have worked ...
by picosecond
Tue May 05, 2020 1:28 pm
Forum: Emulation and Simulation
Topic: Extended 6502 Project (Logisim)
Replies: 126
Views: 31311

Re: Extended 6502 Project (Logisim)

rwiker wrote:
The C256Foenix project (which may or may not still be going)...
The wind-down of C256Foenix was announced yesterday. https://mailchi.mp/12b4b4c9c6e4/c256-fo ... 020-update