Right, the HC670 is quite a bit cheaper than the HCT version. The HC version will probably be fine as long as everything else is CMOS. Spencer uses LS parts in some of his modules, so it has to be HCT.
Btw, the Z80 CPUs and peripherals now found on AliExpress are NMOS despite the CMOS markings on ...
Search found 8 matches
- Wed Apr 23, 2025 7:07 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
- Wed Apr 23, 2025 8:15 am
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
Glad you like it :D
In fact, I would probably try to avoid bending all the green and blue wires at right angles, and just run the buses with shortest path.
But… it’s a computer! They’re meant to be all angular, no?
Kidding aside, there were several reasons for not using shortest paths here. 1 ...
In fact, I would probably try to avoid bending all the green and blue wires at right angles, and just run the buses with shortest path.
But… it’s a computer! They’re meant to be all angular, no?
Kidding aside, there were several reasons for not using shortest paths here. 1 ...
- Tue Apr 22, 2025 12:56 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
I thought I might as well post an update on my CPLD adventures.
The first project was a programmable clock divider to control the baud rate of a SIO/2 dual serial IO. It just barely fits on a 1502 and uses the upper and lower nibbles of one IO port to select the two divider ratios. If I ever find I ...
The first project was a programmable clock divider to control the baud rate of a SIO/2 dual serial IO. It just barely fits on a 1502 and uses the upper and lower nibbles of one IO port to select the two divider ratios. If I ever find I ...
- Thu Feb 27, 2025 9:49 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
Wishful thinking: I’m thinking about using a 1508 as a video controller. Maybe like the VGAtonic, with a separate video RAM, accessed by IO ports, MSX style.
- Thu Feb 27, 2025 9:31 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
The pretty side:
PXL_20250227_194002524.jpg
Wires:
PXL_20250227_194014862.jpg
I have indeed taken care to connect all Gnd and all Vcc pins. Each with a 100nF of its own. You may be able to see that I put a square wire around the PLCC for each of the rails. Don’t think I’ll do it like that next ...
PXL_20250227_194002524.jpg
Wires:
PXL_20250227_194014862.jpg
I have indeed taken care to connect all Gnd and all Vcc pins. Each with a 100nF of its own. You may be able to see that I put a square wire around the PLCC for each of the rails. Don’t think I’ll do it like that next ...
- Tue Feb 25, 2025 9:43 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
The promised report: there is life in my ATF1502S chips.
The "all those wires" project: just a breakout board with a PLCC socket and decoupling caps to test things. Still haven’t soldered all the wires, but enough for JTAG and power and clock and some outputs.
First experiment was to output the ...
The "all those wires" project: just a breakout board with a PLCC socket and decoupling caps to test things. Still haven’t soldered all the wires, but enough for JTAG and power and clock and some outputs.
First experiment was to output the ...
- Sun Feb 23, 2025 11:51 am
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
Thanks!
Still not done soldering all the wires onto that PLCC socket. But will let you know how it went!
Still not done soldering all the wires onto that PLCC socket. But will let you know how it went!
- Thu Feb 20, 2025 12:01 pm
- Forum: Programmable Logic
- Topic: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
- Replies: 60
- Views: 30806
Re: ATF15xx Verilog/VHDL using Quartus 13.0 SP1
But I still get the error logged to the console:
***************************************************************
Error! POF Conversion may not be correct.
Please contact to Atmel EPLD Hotline (408)436-4333, or
email address (pld@atmel.com ...