97a46a7b9b
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.
16 lines
513 B
Plaintext
16 lines
513 B
Plaintext
0xff00 CONSTANT RS_ADDR 0xfffa CONSTANT PS_ADDR
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RS_ADDR 0x80 - CONSTANT SYSVARS
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0x8000 CONSTANT HERESTART
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4 CONSTANT SPI_DATA 5 CONSTANT SPI_CTL 1 CONSTANT SDC_DEVID
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602 LOAD ( acia decl )
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5 LOAD ( z80 assembler )
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262 LOAD ( xcomp ) 282 LOAD ( boot.z80.decl )
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270 LOAD ( xcomp overrides ) 283 335 LOADR ( boot.z80 )
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353 LOAD ( xcomp core low ) 603 605 LOADR ( acia )
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419 LOAD 423 436 LOADR
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390 LOAD ( xcomp core high )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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," ACIA$ BLK$ " EOT,
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