rc2014: unify SD Card driver

Now more low/high layers.

blk/370

@@ -1,4 +1,3 @@
 SD Card driver
 
-Load the z80 part with "372 LOAD", the Forth part with
-"374 LOAD".
+Load range: 372-381

blk/372

@@ -10,5 +10,3 @@ CODE _sdcSR  ( n -- n )
     L A LDrr,
     HL PUSHqq,
 ;CODE
-
-373 LOAD

blk/391

@@ -9,8 +9,8 @@ unusable directly. For the same reason, any reference to a word
 in the host system will obviously be wrong in the target
 system. More details in B260.
 
-These rules result in some practicals do's and dont's:
 
-1. No LEAVE in DO..LOOP
+
+
 
                                                         (cont.)

blk/412

@@ -13,3 +13,4 @@
 
 : ALLOT HERE +! ;
 : CREATE (entry) 11 ( 11 == cellWord ) C, ;
+: LEAVE R> R> DROP I 1- >R >R ;

blk/435

@@ -5,4 +5,4 @@
   variables are sent to PS at runtime )
 : DO COMPILE 2>R H@ ; IMMEDIATE
 : LOOP COMPILE (loop) H@ - , ; IMMEDIATE
-: LEAVE R> R> DROP I 1- >R >R ;
+( LEAVE is implemented in xcomp )

recipes/rc2014/sdcard/README.md

@@ -72,10 +72,9 @@ instead.
 ## Building your stage 3
 
 Using the same technique as you used in the `eeprom` recipe, you can append
-required words to your boot binary. Required units `blk` (B464) and the SD Card
-driver (B370). You only need the Forth part. You of course actually need
-Z80 SDC words but to save you the troubles of rebuilding from stage 1 for this
-recipe, we took the liberty of already having included it in the base recipe.
+required words to your boot binary. There's only one required unit: `blk` from
+core words (B453). The SD card driver was already included in the base recipe
+to save you the troubles of rebuilding from stage 1 for this recipe.
 
 ## Testing in the emulator
 

recipes/rc2014/xcomp.fs

@@ -22,7 +22,7 @@ CURRENT @ XCURRENT !
 282 LOAD  ( boot.z80 )
 393 LOAD  ( icore low )
 352 LOAD  ( acia )
-372 LOAD  ( sdc.z80 )
+372 381 LOADR  ( sdc )
 415 LOAD  ( icore high )
 (entry) _
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