fixed MEMSIZ value, some cleanups

c64/aliases/,aliases_ram_lowmem.s

@@ -39,7 +39,7 @@
 	.label STREND    = $31 // $31-$32  -- NOT IMPLEMENTED --
 	.label FRETOP    = $33 // $33-$34  -- NOT IMPLEMENTED --
 	.label FRESPC    = $35 // $35-$36  [!] our implementation might be different  XXX give more details
-	.label MEMSIZ    = $37 // $37-$38  -- NOT IMPLEMENTED -- highest address of BASIC memory
+	.label MEMSIZ    = $37 // $37-$38  highest address of BASIC memory + 1
 	.label CURLIN    = $39 // $39-$3A  current BASIC line number
 	.label OLDLIN    = $3B // $3B-$3C  previous BASIC line number
 	.label OLDTXT    = $3D // $3D-$3E  current BASIC line pointer

c64/basic/cmd_new.s

@@ -47,21 +47,21 @@ basic_do_new:
 #if CONFIG_MEMORY_MODEL_60K
 	lda #>$F7FF
 #else // CONFIG_MEMORY_MODEL_38K
-	lda #>$9FFF
+	lda #>$A000
 #endif
 	.byte $2C
 !:	
 #if CONFIG_MEMORY_MODEL_60K
 	lda #>$F7FF
 #else // CONFIG_MEMORY_MODEL_38K
-	lda #>$9FFF
+	lda #>$A000
 #endif
 	sta basic_top_of_memory_ptr+1
 	sta basic_start_of_strings_ptr+1
 #if CONFIG_MEMORY_MODEL_60K
 	lda #<$F7FF
 #else // CONFIG_MEMORY_MODEL_38K
-	lda #<$9FFF
+	lda #<$A000
 #endif
 	sta basic_top_of_memory_ptr+0
 	sta basic_start_of_strings_ptr+0