diff --git a/src/dos_m65/,aliases_dos.s b/src/dos_m65/,aliases_dos.s
index 6416122c..877b2072 100644
--- a/src/dos_m65/,aliases_dos.s
+++ b/src/dos_m65/,aliases_dos.s
@@ -109,26 +109,67 @@
 	!addr FD_STATUS_IDX    = $806E ; - floppy
 	!addr RD_STATUS_IDX    = $806F ; - ram disk
 
-	!addr XX_STATUS_STR    = $8070
-	!addr SD_STATUS_STR    = $8070 ; status string for SD card, terminated by 0
-	!addr FD_STATUS_STR    = $80A0 ; status string for floppy drive, terminated by 0
-	!addr RD_STATUS_STR    = $80D0 ; status string for ram disk, terminated by 0
+	!addr SD_DESC          = $8070 ; current file descriptor
+
+
+
+	; XXX Free space
+
 
 	;
-	; Further pages
+	; Various buffers, caches, and other large memory chunks
 	;
 
-	!addr SD_CMDFN_BUF     = $8100 ; buffer for command and/or file name, 128 bytes, SD card
-	!addr FD_CMDFN_BUF     = $8180 ; buffer for command and/or file name, 128 bytes, floppy
-	!addr RD_CMDFN_BUF     = $8200 ; buffer for command and/or file name, 128 bytes, ram disk
+	; BAM cache for floppy drives; 2 KB (4 blocks) each, to cover up to ED floppies - XXX implementation to be written
 
-	!addr XX_DIR_ENTRY     = $8280 ; directory entry in BASIC format
-	!addr SD_DIR_ENTRY     = $8280 ; - SD card
-	!addr FD_DIR_ENTRY     = $82B0 ; - floppy
-	!addr RD_DIR_ENTRY     = $82E0 ; - ram disk
+	!addr FD_BAM_CACHE_0   = $8A00 ; - floppy drive 0
+	!addr FD_BAM_CACHE_1   = $8E00 ; - floppy drive 1
 
-	!addr SD_MEMSHADOW     = $8310 ; 256 byte buffer for preserving original memory content
-	!addr SD_FILEBUF       = $8410 ; 512 byte buffer for file reading
+	; General purpose buffers, 512 bytes each, each starts at page start - XXX dynamic alllocation to be written
 
-	!addr SD_DESC          = $8610 ; current file descriptor
+	!addr SHARED_BUF_0     = $9200  ; XXX temporarily hardcoded for usage by SD card
+	!addr SHARED_BUF_1     = $9400
+	!addr SHARED_BUF_2     = $9600
+	!addr SHARED_BUF_3     = $9800
+	!addr SHARED_BUF_4     = $9A00
+	!addr SHARED_BUF_5     = $9C00
+	!addr SHARED_BUF_6     = $9E00
+	!addr SHARED_BUF_7     = $A000
+	!addr SHARED_BUF_8     = $A200
+	!addr SHARED_BUF_9     = $A400
+	!addr SHARED_BUF_A     = $A600
+	!addr SHARED_BUF_B     = $A800
+	!addr SHARED_BUF_C     = $AA00
+	!addr SHARED_BUF_D     = $AC00
+	!addr SHARED_BUF_E     = $AE00
+	!addr SHARED_BUF_F     = $B000
 
+	; Memory shadow, needed for SD card support
+
+	!addr SD_MEMSHADOW_BUF = $8200 ; 256 byte buffer for preserving original memory content
+
+	; Command/filename buffers, 128 bytes each - XXX extend to 256 bytes (change implementation)
+
+	!addr SD_CMDFN_BUF     = $B300 ; - SD card
+	!addr FD_CMDFN_BUF     = $B400 ; - floppy
+	!addr RD_CMDFN_BUF     = $B500 ; - ram disk
+
+	; Directory entry buffers, in BASIC format, $30 bytes each
+
+	!addr XX_DIRENT_BUF    = $B600
+	!addr SD_DIRENT_BUF    = $B600 ; - SD card
+	!addr FD_DIRENT_BUF    = $B630 ; - floppy
+	!addr RD_DIRENT_BUF    = $B660 ; - ram disk
+
+	; Status buffers, content terminated by 0, $30 bytes each
+
+	!addr XX_STATUS_BUF    = $B690
+	!addr SD_STATUS_BUF    = $B690 ; - SD card
+	!addr FD_STATUS_BUF    = $B6C0 ; - floppy
+	!addr RD_STATUS_BUF    = $B6F0 ; - ram disk
+
+	;
+	; Reserved 18 KB for floppy track buffers + some area for track metadata
+	;
+
+	!addr XX_REMAINING     = $B720
diff --git a/src/dos_m65/dev_floppy/dev_fd_init.s b/src/dos_m65/dev_floppy/dev_fd_init.s
index 501bcc61..4be7c57a 100644
--- a/src/dos_m65/dev_floppy/dev_fd_init.s
+++ b/src/dos_m65/dev_floppy/dev_fd_init.s
@@ -20,7 +20,7 @@ dev_fd_init:
 @1:
 	inx
 	lda dos_sts_init_floppy,x
-	sta FD_STATUS_STR,x
+	sta FD_STATUS_BUF,x
 	bne @1
 
 	; End of initialization
diff --git a/src/dos_m65/dev_ramdisk/dev_rd_init.s b/src/dos_m65/dev_ramdisk/dev_rd_init.s
index e7be8d2c..964eae2a 100644
--- a/src/dos_m65/dev_ramdisk/dev_rd_init.s
+++ b/src/dos_m65/dev_ramdisk/dev_rd_init.s
@@ -20,7 +20,7 @@ dev_rd_init:
 @1:
 	inx
 	lda dos_sts_init_ramdisk,x
-	sta RD_STATUS_STR,x
+	sta RD_STATUS_BUF,x
 	bne @1
 
 	; End of initialization
diff --git a/src/dos_m65/dev_sdcard/dev_sd_init.s b/src/dos_m65/dev_sdcard/dev_sd_init.s
index 526e5d3a..4ee236a8 100644
--- a/src/dos_m65/dev_sdcard/dev_sd_init.s
+++ b/src/dos_m65/dev_sdcard/dev_sd_init.s
@@ -21,7 +21,7 @@ dev_sd_init:
 @1:
 	inx
 	lda dos_sts_init_sdcard,x
-	sta SD_STATUS_STR,x
+	sta SD_STATUS_BUF,x
 	bne @1
 
 	; Close all the files in the hypervisor, go to root directory
diff --git a/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s b/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
index 91bb422e..fdcbaaa8 100644
--- a/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
+++ b/src/dos_m65/dev_sdcard/fs_hvsr_read_dir.s
@@ -66,21 +66,21 @@ fs_hvsr_read_dir:
 
 	jsr util_dir_filesize_bytes
 
-	; Prepare output entry, starting from XX_DIR_ENTRY + initial offset
+	; Prepare output entry, starting from XX_DIRENT_BUF + initial offset
 
 	ldx #$00                           ; offset for SD card unit
 
 	lda #$01                           ; link to the next line - dummy, will be regenerated by BASIC
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	lda PAR_FSIZE_BLOCKS+0             ; store number of blocks
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 	lda PAR_FSIZE_BLOCKS+1
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	lda #' '                           ; indent file name
@@ -88,14 +88,14 @@ fs_hvsr_read_dir:
 @lp1:
 	dey
 	bmi @lp1_done
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 	bra @lp1
 
 @lp1_done:
 
 	lda #$22                           ; opening quote
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	ldy #$FF                           ; put file name
@@ -108,14 +108,14 @@ fs_hvsr_read_dir:
 	beq @lp2_done
 	cpy #$10
 	beq @lp2_done
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 	bra @lp2
 
 @lp2_done:
 
 	lda #$22                           ; closing quote
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	ldy #$10                           ; put spaces for indentation
@@ -128,7 +128,7 @@ fs_hvsr_read_dir:
 	bne @lp3_done
 
 	lda #' '
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 	bra @lp3
 
@@ -142,7 +142,7 @@ fs_hvsr_read_dir:
 @closed:
 
 	lda #' '
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	lda PAR_FTYPE                      ; put file type
@@ -156,7 +156,7 @@ fs_hvsr_read_dir:
 	
 	lda dir_types, y
 	beq @lp4_done
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 	iny
 	bra @lp4
@@ -167,21 +167,21 @@ fs_hvsr_read_dir:
 	and #$40
 	beq @skipro
 	lda #'<'
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 @skipro:
 
 	lda #$00                           ; put end of the line
-	sta XX_DIR_ENTRY, x
+	sta XX_DIRENT_BUF, x
 	inx
 
 	stx SD_ACPTR_LEN+0
 	sta SD_ACPTR_LEN+1
 
-	lda #<(XX_DIR_ENTRY)
+	lda #<(XX_DIRENT_BUF)
 	sta SD_ACPTR_PTR+0
-	lda #>(XX_DIR_ENTRY)
+	lda #>(XX_DIRENT_BUF)
 	sta SD_ACPTR_PTR+1
 
 	clc
@@ -227,7 +227,7 @@ fs_hvsr_direntmem_prepare:
 	ldx #$00
 @1:
 	ldy $1000, x
-	sty SD_MEMSHADOW, x
+	sty SD_MEMSHADOW_BUF, x
 	inx
 	bne @1
 
@@ -239,7 +239,7 @@ fs_hvsr_direntmem_restore:
 
 	ldx #$00
 @1:
-	ldy SD_MEMSHADOW, x
+	ldy SD_MEMSHADOW_BUF, x
 	sty $1000, x
 	inx
 	bne @1
diff --git a/src/dos_m65/dev_sdcard/fs_hvsr_read_file.s b/src/dos_m65/dev_sdcard/fs_hvsr_read_file.s
index 61977c37..29c88fba 100644
--- a/src/dos_m65/dev_sdcard/fs_hvsr_read_file.s
+++ b/src/dos_m65/dev_sdcard/fs_hvsr_read_file.s
@@ -99,12 +99,12 @@ fs_hvsr_read_file:
 
 	; Set pointer to new data
 
-	lda #<SD_FILEBUF
+	lda #<SHARED_BUF_0
 	sta SD_ACPTR_PTR+0
-	lda #>SD_FILEBUF
+	lda #>SHARED_BUF_0
 	sta SD_ACPTR_PTR+1
 
-	; Copy data to SD_FILEBUF
+	; Copy data to SHARED_BUF_0
 
 	lda #%10000000                    ; select SD card buffer
 	tsb SD_BUFCTL
@@ -131,8 +131,8 @@ fs_hvsr_read_file:
 	!byte $00                         ; operation: COPY
 	!word $0200                       ; data size if 512 bytes
 	!byte $00, $6E, $0D               ; src. addr is $xxD6E00
-	!byte <(SD_FILEBUF - $8000)
-	!byte >(SD_FILEBUF - $8000)
+	!byte <(SHARED_BUF_0 - $8000)
+	!byte >(SHARED_BUF_0 - $8000)
 	!byte $01                         ; dst. addr is $xx1xxxx (internal buffer)
 
 fs_hvsr_file_not_found:
diff --git a/src/dos_m65/msg_acptr.s b/src/dos_m65/msg_acptr.s
index e3bffd87..f1e0dbe2 100644
--- a/src/dos_m65/msg_acptr.s
+++ b/src/dos_m65/msg_acptr.s
@@ -90,21 +90,21 @@ msg_ACPTR_status_SD:                   ; get next byte of status - SD card
 
 	ldx SD_STATUS_IDX
 	inc SD_STATUS_IDX
-	lda SD_STATUS_STR,x
+	lda SD_STATUS_BUF,x
 	bra msg_ACPTR_status_got
 
 msg_ACPTR_status_FD:                   ; get next byte of status - floppy
 
 	ldx FD_STATUS_IDX
 	inc FD_STATUS_IDX
-	lda FD_STATUS_STR,x
+	lda FD_STATUS_BUF,x
 	bra msg_ACPTR_status_got
 
 msg_ACPTR_status_RD:                   ; get next byte of status - ram disk
 
 	ldx RD_STATUS_IDX
 	inc RD_STATUS_IDX
-	lda RD_STATUS_STR,x
+	lda RD_STATUS_BUF,x
 
 	; FALLTROUGH
 
diff --git a/src/dos_m65/utils/util_status.s b/src/dos_m65/utils/util_status.s
index 126f7a96..209a73cd 100644
--- a/src/dos_m65/utils/util_status.s
+++ b/src/dos_m65/utils/util_status.s
@@ -50,7 +50,7 @@ util_status_common:
 @lp:
 	jsr code_LDA_nnnn_Y
 	beq @lp_end
-	sta XX_STATUS_STR, x
+	sta XX_STATUS_BUF, x
 	iny
 	inx
 	bra @lp
@@ -69,13 +69,13 @@ util_status_common:
 	; Mark end of status and quit
 
 	lda #$00
-	sta XX_STATUS_STR, x
+	sta XX_STATUS_BUF, x
 	rts
 
 util_status_store_comma:
 
 	ldy #','
-	sty XX_STATUS_STR, x
+	sty XX_STATUS_BUF, x
 	inx
 	rts
 
@@ -86,7 +86,7 @@ util_status_store_number:
 	cmp #200
 	bcc @store_00_199
 	ldy #'2'
-	sty XX_STATUS_STR, x
+	sty XX_STATUS_BUF, x
 	inx
 	sec
 	sbc #200
@@ -97,7 +97,7 @@ util_status_store_number:
 	cmp #100
 	bcc @store_00_99
 	ldy #'1'
-	sty XX_STATUS_STR, x
+	sty XX_STATUS_BUF, x
 	inx
 	sec
 	sbc #100
@@ -115,11 +115,11 @@ util_status_store_number:
 
 @store_finalize:   ; first digit to store in .Y, second in .A (need no add '0')
 
-	sty XX_STATUS_STR, x
+	sty XX_STATUS_BUF, x
 	inx
 	clc
 	adc #'0'
-	sta XX_STATUS_STR, x
+	sta XX_STATUS_BUF, x
 	inx
 
 	rts