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rc2014: improve SD card driver docs

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This commit is contained in:
Virgil Dupras 2020-06-28 16:34:41 -04:00
parent 27025bf141
commit b8800be76f
4 changed files with 11 additions and 3 deletions
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10
blk/600
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@ -1,3 +1,13 @@
SD Card driver
Load range: 602-616
This driver is designed for a ad-hoc adapter card that acts as a
SPI relay between the z80 bus and the SD card. That adapter is
expected to pull CS low when something is written to SDC_CSLOW,
high on SDC_CSHIGH and to initiate a SPI exchange when a byte is
written to SDC_SPI, the result of that exchange being fetched
with a read to SDC_SPI.
Through that layer, this driver implements the SDC protocol
allowing it to provide BLK@ and BLK!.

1
blk/604
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@ -13,4 +13,3 @@
DUP 20 = UNTIL
DROP 0xff
;
1 12 LOADR+

2
recipes/rc2014/sdcard/README.md
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@ -86,7 +86,7 @@ Build it and write it to EEPROM.
The RC2014 emulator includes SDC emulation. You can attach a SD card image to
it by invoking it with a second argument:
../../../emul/hw/rc2014/classic os.bin ../../../emul/blkfs
../../../emul/hw/rc2014/classic os.bin ../../../cvm/blkfs
You will then run with a SD card having the contents from `/blk`.

1
recipes/rc2014/sdcard/cfsin/hello.txt
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@ -1 +0,0 @@
Hello World!