collapseos

Author	SHA1	Message	Date
Virgil Dupras	953e040231	emul/z80: add AT28 EEPROM emulator This will facilitate the development of a solution for cross-compiling directly to EEPROM.	2020-12-08 20:07:53 -05:00
Virgil Dupras	23885dac33	emul: add TRS-80 emulator Not complete yet, but has @KEY and @DSP, enough to get prompt.	2020-12-05 22:04:22 -05:00
Virgil Dupras	97a46a7b9b	emul/z80: decouple SDC and SPI My idea of plugging a RC2014 bridge directly onto a Sega Master System cartridge doesn't work. The SMS eats all I/O addr space, we can't use it. Therefore, this naive idea, in the emulator, of reusing sdc.c in sms.c as-is, doesn't work either. I'll have to find another way of communicating to a SPI device on the SMS. I'll probably do it through a controller port. Meanwhile, I need to decouple SPI from SDC in the emulator code so that I can reuse sdc.c. This is what is done here.	2020-10-29 15:01:25 -04:00
Virgil Dupras	6947fea2a8	emul/z80: add SD card support to SMS It works (in emulation, but soon on real hardware!), but the LIST command is awkward due to tight screen estate...	2020-10-25 16:53:58 -04:00
Virgil Dupras	490eceab6d	emul/z80: flatten directory structure I'm about to reuse sdc.c in sms.c and the old directory structure was becoming awkward.	2020-10-25 15:58:00 -04:00