Search found 29 matches
- Thu Jul 27, 2023 1:53 pm
- Forum: CX16 Hardware Support
- Topic: FLIR baseline on Development Board
- Replies: 11
- Views: 14114
Re: FLIR baseline on Development Board
There may be "false-positives" due to reflections - for instance the metal casing around the keyboard/mouse are also a large reflective surface. At certain angles, I noticed the FLIR was "seeing itself" (or some other object in the reflection - such as my own body, which ends up...
- Thu Jul 20, 2023 10:22 pm
- Forum: CX16 Hardware Support
- Topic: FLIR baseline on Development Board
- Replies: 11
- Views: 14114
- Sun Jul 16, 2023 9:19 pm
- Forum: CX16 Hardware Support
- Topic: FLIR baseline on Development Board
- Replies: 11
- Views: 14114
Re: FLIR baseline on Development Board
This is really great work. Definitely shows the Yamaha could benefit from a heatsink to help extend its life.
- Sun Jul 02, 2023 6:42 pm
- Forum: CX16 Hardware Support
- Topic: Expansion slots
- Replies: 58
- Views: 3600374
Re: Expansion slots
Thanks Spargue! I’ve just sat down with a coffee and breakfast burrito at my local reservation breakfast shack to look at finalising this design when I saw your additional post here - much obliged. I hadn’t realised WE# needed to end a tad early so thanks for that. One thing I’m not sufficiently cl...
- Sun Jul 02, 2023 10:43 am
- Forum: CX16 Hardware Support
- Topic: Expansion slots
- Replies: 58
- Views: 3600374
Re: Expansion slots
On my PC now and not on my phone. Noticed the WE doesn't use the PHI2 edge. WE# needs to end slightly early to grab the data or it all collapses in a fuzzy way and you get bad writes. OE doesn't need this latch as its grabbed from the CPU internally on PHY2 I'd recommend some inline resistors on the...
- Sat Jul 01, 2023 10:24 pm
- Forum: CX16 Hardware Support
- Topic: Expansion slots
- Replies: 58
- Views: 3600374
Re: Expansion slots
Just so I'm clear from having followed this interesting & spirited discussion... If I WRITE to the banked ROM space for banks above #0-#31 and I have an expansion card with RAM mapped in to the ROM space, the data that is written by the CPU will actually be stored in the RAM, assuming I've wire...
- Sat Jul 01, 2023 10:20 pm
- Forum: CX16 Hardware Support
- Topic: Expansion slots
- Replies: 58
- Views: 3600374
Re: Expansion slots
Just so I'm clear from having followed this interesting & spirited discussion... If I WRITE to the banked ROM space for banks above #0-#31 and I have an expansion card with RAM mapped in to the ROM space, the data that is written by the CPU will actually be stored in the RAM, assuming I've wire...
- Thu Jun 29, 2023 3:34 pm
- Forum: CX16 Hardware Support
- Topic: Access to banked memory by expansion cards
- Replies: 21
- Views: 20867
Re: Access to banked memory by expansion cards
I'm the one that proposed using the VPB signal as an additional reset to the ROM bank latch and I looked at it fairly closely. Ultimately the decision was VPB as the only signal, which I disagree with but that's because I'd like an advanced debugger to insert itself after reset but before the CPU s...
- Thu Jun 29, 2023 7:53 am
- Forum: CX16 Hardware Support
- Topic: Access to banked memory by expansion cards
- Replies: 21
- Views: 20867
Re: Access to banked memory by expansion cards
Do expansion cards of any/all types, whether using the dedicated IO slots or accessing the full 64K address space seen by the CPU also get to 'see' the same banked ROM & RAM as the CPU does? I'm working on an expansion card design that could really do with accessing at least one of the 8K RAM b...
- Wed Jun 28, 2023 11:23 pm
- Forum: CX16 Hardware Support
- Topic: Access to banked memory by expansion cards
- Replies: 21
- Views: 20867
Re: Access to banked memory by expansion cards
I might know where the confusion is coming from. 4 latch is now value before entering ISR (not bank 0), but ISR is still running assuming it's bank 0. The very beginning of the ISR, which is responsible for reading $0001, pushing it onto the stack, and setting $0001 to zero, is executing out of RAM...