Search found 1174 matches

by CunningFellow
Sat Jun 08, 2019 12:15 am
Forum: Programming & Software
Topic: Mode 72 development
Replies: 81
Views: 18739

Re: Mode 72 development

My next one after RLE is going to be super sized scaled sprites.

Think Space Harrier / Hangon / Outrun.

I'm no where near as good as you at pumping out code quickly though. So I wouldn't expect to see any Testarossas on the small screen any time soon though.
by CunningFellow
Sat Jun 08, 2019 12:05 am
Forum: Programming & Software
Topic: SPIF gets cleared if ANY interrupt happens?
Replies: 14
Views: 2717

Re: SPIF gets cleared if ANY interrupt happens?

I concur the bootloader built in SD functions are the easiest thing to use. If you need absolute full speed you can turn the CRC checking off and then graft in the SD_Simple block reading commands. It is hand crafted assembly intended to get absolute minimum clocks per data. It also has "scatter/gat...
by CunningFellow
Tue Jun 04, 2019 8:49 am
Forum: Programming & Software
Topic: SPIF gets cleared if ANY interrupt happens?
Replies: 14
Views: 2717

Re: SPIF gets cleared if ANY interrupt happens?

If it was only one of the six SD card that you couldn't get work you could probably just say it was a bad apple.
by CunningFellow
Sat Jun 01, 2019 9:55 am
Forum: Programming & Software
Topic: SPIF gets cleared if ANY interrupt happens?
Replies: 14
Views: 2717

Re: SPIF gets cleared if ANY interrupt happens?

Or with the AVR Emulator in AVR Studio 4. It is meant to be perfect emulation of the chips its supports.
by CunningFellow
Fri May 31, 2019 8:23 am
Forum: Programming & Software
Topic: SPIF gets cleared if ANY interrupt happens?
Replies: 14
Views: 2717

Re: SPIF gets cleared if ANY interrupt happens?

What does the ASM in the LSS file look like for that C?
by CunningFellow
Wed May 29, 2019 10:37 pm
Forum: Uzebox Derivatives & open source consoles
Topic: MicroDuo if ever (2 x ATmega1284 system)
Replies: 13
Views: 3218

Re: MicroDuo if ever (2 x ATmega1284 system)

Generally I think PIC SUCKS AVR RULES But a PIC might be a better choice for your GPU side. The whole idea of the PIC architecture was to be a peripheral for other CPU that did not have proper I/O. Their ISA is very suited to bit twiddling. A 28 pin DIP 8 bit PIC with 128K flash and 8K RAM is 1/2 th...
by CunningFellow
Wed May 29, 2019 10:18 pm
Forum: Games & Demos
Topic: WIP: Shadowgate
Replies: 64
Views: 15540

Re: WIP: Shadowgate

Tempest was a huge hack to get down to 5clk per pixel. (288/256 pixel wide) and it used/wasted a lot of flash to achieve this. One of those hacks was that the 1bpp background had to be in the MSB of portc. It was just fortunate that the MSB was the brightest blue bit and that colour suited tempest. ...
by CunningFellow
Wed May 08, 2019 10:18 pm
Forum: Programming & Software
Topic: High resolution ROM/RAM tiles attribute mode
Replies: 4
Views: 877

Re: High resolution ROM/RAM tiles attribute mode

What is your "ideal" video mode for this large game?

It sounds like low RAM usage may be one of the things and that is a hard one.
by CunningFellow
Tue May 07, 2019 7:54 am
Forum: Programming & Software
Topic: High resolution ROM/RAM tiles attribute mode
Replies: 4
Views: 877

Re: High resolution ROM/RAM tiles attribute mode

Nice.

It takes me 3 years to do a new video mode.

You are a coding machine.