diff --git a/rickjr.ld b/rickjr.ld
index 44f85ff..9ba8673 100644
--- a/rickjr.ld
+++ b/rickjr.ld
@@ -8,6 +8,8 @@ PROVIDE(__stack = 0xA000);
 PROVIDE(__f256_start = 0x300);
 /* page size of a block of memory */
 PROVIDE(__BLOCK_SIZE = 0x2000);
+/* swappable block address */
+PROVIDE(__SLOT_ADDR = 0xA000);
 
 /* f256k uses first 16 bytes of ZP for mmu control? */
 __rc0 = 0x10;
@@ -22,46 +24,41 @@ MEMORY {
 }
 
 /* LMAs */
-__fixed_lma	= 0x0000a000;
-
-__block8_lma	= 0x01a000;
-__block9_lma	= 0x02a000;
-__block10_lma	= 0x03a000;
-__block11_lma	= 0x04a000;
-__block12_lma	= 0x05a000;
-__block13_lma	= 0x06a000;
-__block14_lma	= 0x07a000;
-__block15_lma	= 0x08a000;
-__block16_lma	= 0x09a000;
-__block17_lma	= 0x0Aa000;
-__block18_lma	= 0x0Ba000;
-__block19_lma	= 0x0Ca000;
-__block20_lma	= 0x0Da000;
-__block21_lma	= 0x0Ea000;
-__block22_lma	= 0x0Fa000;
-__block23_lma	= 0x10a000;
+__block8_lma	= 0x08a000;
+__block9_lma	= 0x09a000;
+__block10_lma	= 0x0Aa000;
+__block11_lma	= 0x0Ba000;
+__block12_lma	= 0x0Ca000;
+__block13_lma	= 0x0Da000;
+__block14_lma	= 0x0Ea000;
+__block15_lma	= 0x0Fa000;
+__block16_lma	= 0x10a000;
+__block17_lma	= 0x11a000;
+__block18_lma	= 0x12a000;
+__block19_lma	= 0x13a000;
+__block20_lma	= 0x14a000;
+__block21_lma	= 0x15a000;
+__block22_lma	= 0x16a000;
+__block23_lma	= 0x17a000;
 
 
 MEMORY {
-  block8        : ORIGIN = __block8_lma,  LENGTH = __BLOCK_SIZE
-  block9        : ORIGIN = __block9_lma,  LENGTH = __BLOCK_SIZE
-  block10	: ORIGIN = __block10_lma, LENGTH = __BLOCK_SIZE
-  block11	: ORIGIN = __block11_lma, LENGTH = __BLOCK_SIZE
-  block12	: ORIGIN = __block12_lma, LENGTH = __BLOCK_SIZE
-  block13	: ORIGIN = __block13_lma, LENGTH = __BLOCK_SIZE
-  block14	: ORIGIN = __block14_lma, LENGTH = __BLOCK_SIZE
-  block15	: ORIGIN = __block15_lma, LENGTH = __BLOCK_SIZE
-
-  block16	: ORIGIN = __block16_lma, LENGTH = __BLOCK_SIZE
-  block17	: ORIGIN = __block17_lma, LENGTH = __BLOCK_SIZE
-  block18       : ORIGIN = __block18_lma, LENGTH = __BLOCK_SIZE
-  block19	: ORIGIN = __block19_lma, LENGTH = __BLOCK_SIZE
-  block20	: ORIGIN = __block20_lma, LENGTH = __BLOCK_SIZE
-  block21	: ORIGIN = __block21_lma, LENGTH = __BLOCK_SIZE
-  block22	: ORIGIN = __block22_lma, LENGTH = __BLOCK_SIZE
-  block23	: ORIGIN = __block23_lma, LENGTH = __BLOCK_SIZE
-
-  fixed		: ORIGIN = __fixed_lma,   LENGTH = __BLOCK_SIZE
+  block8    : ORIGIN = __block8_lma,  LENGTH = __BLOCK_SIZE
+  block9    : ORIGIN = __block9_lma,  LENGTH = __BLOCK_SIZE
+  block10   : ORIGIN = __block10_lma, LENGTH = __BLOCK_SIZE
+  block11   : ORIGIN = __block11_lma, LENGTH = __BLOCK_SIZE
+  block12   : ORIGIN = __block12_lma, LENGTH = __BLOCK_SIZE
+  block13   : ORIGIN = __block13_lma, LENGTH = __BLOCK_SIZE
+  block14   : ORIGIN = __block14_lma, LENGTH = __BLOCK_SIZE
+  block15   : ORIGIN = __block15_lma, LENGTH = __BLOCK_SIZE
+  block16   : ORIGIN = __block16_lma, LENGTH = __BLOCK_SIZE
+  block17   : ORIGIN = __block17_lma, LENGTH = __BLOCK_SIZE
+  block18   : ORIGIN = __block18_lma, LENGTH = __BLOCK_SIZE
+  block19   : ORIGIN = __block19_lma, LENGTH = __BLOCK_SIZE
+  block20   : ORIGIN = __block20_lma, LENGTH = __BLOCK_SIZE
+  block21   : ORIGIN = __block21_lma, LENGTH = __BLOCK_SIZE
+  block22   : ORIGIN = __block22_lma, LENGTH = __BLOCK_SIZE
+  block23   : ORIGIN = __block23_lma, LENGTH = __BLOCK_SIZE
 }
 
 REGION_ALIAS("c_writeable", ram)
@@ -73,57 +70,66 @@ SECTIONS {
 
   INCLUDE c.ld
 
-  .fixed     : { *(.fixed .fixed.*)         } >fixed
-
-  .block8     : { *(.block8     .block8.*)     } >block8
-  .block9     : { *(.block9     .block9.*)     } >block9
-  .block10    : { *(.block10    .block10.*)    } >block10
-  .block11    : { *(.block11    .block11.*)    } >block11
-  .block12    : { *(.block12    .block12.*)    } >block12
-  .block13    : { *(.block13    .block13.*)    } >block13
-  .block14    : { *(.block14    .block14.*)    } >block14
-  .block15    : { *(.block15    .block15.*)    } >block15
-  .block16    : { *(.block16    .block16.*)    } >block16
-  .block17    : { *(.block17    .block17.*)    } >block17
-  .block18    : { *(.block18    .block18.*)    } >block18
-  .block19    : { *(.block19    .block19.*)    } >block19
-  .block20    : { *(.block20    .block20.*)    } >block20
-  .block21    : { *(.block21    .block21.*)    } >block21
-  .block22    : { *(.block22    .block22.*)    } >block22
-  .block23    : { *(.block23    .block23.*)    } >block23
+  .block8     : { *(.block8     .block8.*)     } >block8   end_block8 = .;
+  .block9     : { *(.block9     .block9.*)     } >block9   end_block9 = .;
+  .block10    : { *(.block10    .block10.*)    } >block10  end_block10 = .;
+  .block11    : { *(.block11    .block11.*)    } >block11  end_block11 = .;
+  .block12    : { *(.block12    .block12.*)    } >block12  end_block12 = .;
+  .block13    : { *(.block13    .block13.*)    } >block13  end_block13 = .;
+  .block14    : { *(.block14    .block14.*)    } >block14  end_block14 = .;
+  .block15    : { *(.block15    .block15.*)    } >block15  end_block15 = .;
+  .block16    : { *(.block16    .block16.*)    } >block16  end_block16 = .;
+  .block17    : { *(.block17    .block17.*)    } >block17  end_block17 = .;
+  .block18    : { *(.block18    .block18.*)    } >block18  end_block18 = .;
+  .block19    : { *(.block19    .block19.*)    } >block19  end_block19 = .;
+  .block20    : { *(.block20    .block20.*)    } >block20  end_block20 = .;
+  .block21    : { *(.block21    .block21.*)    } >block21  end_block21 = .;
+  .block22    : { *(.block22    .block22.*)    } >block22  end_block22 = .;
+  .block23    : { *(.block23    .block23.*)    } >block23  end_block23 = .;
 }
 
 /* OUTPUT_FORMAT { FULL(cart_rom) } */
 OUTPUT_FORMAT {
-  FULL(block8)
-  FULL(block9)
-  FULL(block10)
-  FULL(block11)
-  FULL(block12)
-  FULL(block13)
-  FULL(block14)
-  FULL(block15)
-  FULL(block16)
-  FULL(block17)
-  FULL(block18)
-  FULL(block19)
-  FULL(block20)
-  FULL(block21)
-  FULL(block22)
-  FULL(block23)
-  FULL(fixed)
-}
+  BYTE(0x5A)    /* pgZ */
 
+/* ram segment */
+
+  SHORT(ORIGIN(ram))
+  BYTE(0x00)
+  SHORT(__bss_start-ORIGIN(ram))
+  BYTE(0x00)
+  TRIM(ram)
+
+/* block8 */
+  SHORT(ORIGIN(block8))
+  BYTE(0x00)
+  SHORT(end_block8 - __block8_lma)
+  TRIM(block8)
+
+/* block9 */
+/*
+  SHORT(ORIGIN(block9))
+  BYTE(0x00)
+  SHORT(end_block9 - __block9_lma)
+  TRIM(block9)
+*/
 
 /*
-__attribute__((section(".bank30.rodata"))) const char bank30_s[] = "bank thirty";
-
-...
-
-__attribute__((noinline, section(".bank2.text"))) signed char bank2_fn(void) {
-  asm volatile("nop");
-  puts(bank2_s);
-  asm volatile("nop");
-  return 5;
-}
+  TRIM(block9)
+  TRIM(block10)
+  TRIM(block11)
+  TRIM(block12)
+  TRIM(block13)
+  TRIM(block14)
+  TRIM(block15)
+  TRIM(block16)
+  TRIM(block17)
+  TRIM(block18)
+  TRIM(block19)
+  TRIM(block20)
+  TRIM(block21)
+  TRIM(block22)
+  TRIM(block23)
 */
+}
+