improved support for different RAM configurations

src/,,config_mega65.s

@@ -52,23 +52,23 @@
 
 ;; #CONFIG# PROGRAMMABLE_KEYS          YES
 
-;; #CONFIG# KEYCMD_RUN                 "RUN"
+;; #CONFIG# KEYCMD_RUN                 "RUN:"
 
 ;; #CONFIG# KEYCMD_F1                  "@8$"
 ;; #CONFIG# KEYCMD_F2                  "LOAD"
 ;; #CONFIG# KEYCMD_F3                  "@9$"
-;; #CONFIG# KEYCMD_F4                  "RUN:"
+;; #CONFIG# KEYCMD_F4                  "\5FL"
 ;; #CONFIG# KEYCMD_F5                  "@10$"
-;; #CONFIG# KEYCMD_F6                  "REM F6"
+;; #CONFIG# KEYCMD_F6                  "\5FHF"
 ;; #CONFIG# KEYCMD_F7                  "@11$"
 ;; #CONFIG# KEYCMD_F8                  "MONITOR"
 
 ;; #CONFIG# KEYCMD_HELP                "LIST"
 
-;; #CONFIG# KEYCMD_F9                  "@28$"
-;; #CONFIG# KEYCMD_F10                 "\5FL"
-;; #CONFIG# KEYCMD_F11                 "@29$"
-;; #CONFIG# KEYCMD_F12                 "\5FHF"
+;; #CONFIG# KEYCMD_F9                  "@27$"
+;; #CONFIG# KEYCMD_F10                 "REM F10"
+;; #CONFIG# KEYCMD_F11                 "@28$"
+;; #CONFIG# KEYCMD_F12                 "@29$"
 ;; #CONFIG# KEYCMD_F13                 "@30$"
 ;; #CONFIG# KEYCMD_F14                 "BOOTCPM"
 
@@ -90,8 +90,8 @@
 
 ; --- Built-in DOS configuration
 
-;; #CONFIG# UNIT_SDCARD                28
-;; #CONFIG# UNIT_FLOPPY                29
+;; #CONFIG# UNIT_SDCARD                27
+;; #CONFIG# UNIT_FLOPPY                28        ; XXX use separate number for second floppy (device 29)
 ;; #CONFIG# UNIT_RAMDISK               30
 
 

src/dos_m65/,aliases_dos.s

@@ -122,6 +122,10 @@
 	!addr FD_LOADTRACK     = $8072 ; current track for file loading
 	!addr FD_LOADSECTOR    = $8073 ; current sector for file loading
 
+	!addr RD_STARTSEG      = $8074 ; RAM disk start address, 2nd most significant byte (or $FF if no RAM)
+	!addr RD_MAXTRACK      = $8075 ; maximum RAM disk track number
+
+
 	; XXX Free space
 
 

src/dos_m65/dos_unitset.s

@@ -14,17 +14,16 @@ dos_UNITSET:
 @ok:
 	jsr dos_ENTER
 
-	; XXX do not allow illegal device numbers... above 30 or below 8 ?
+	; XXX do not allow illegal device numbers (above 30 or below 8)
 
 	; Check what kind of device was requested
 
 	cmp #$00
 	beq dos_UNITSET_sdcard
-	; XXX devices below are not implemented yet
-	; cmp #$01
-	; beq dos_UNITSET_floppy
-	; cmp #$02
-	; beq dos_UNITSET_ramdisk
+	cmp #$01
+	beq dos_UNITSET_floppy
+	cmp #$02
+	beq dos_UNITSET_ramdisk
 
 	jmp dos_EXIT_SEC
 
@@ -38,12 +37,13 @@ dos_UNITSET_sdcard:
 dos_UNITSET_floppy:
 
 	stx UNIT_FLOPPY
-	+skip_2_bytes_trash_nvz
-
-	; FALLTROUGH
+	jmp dos_EXIT_CLC
 
 dos_UNITSET_ramdisk:
 
 	stx UNIT_RAMDISK
 
-	jmp dos_EXIT_CLC
+	; Clear RAM disk device number if no Hyper RAM available
+
+	jsr util_check_rd_ram
+	jmp dos_EXIT

src/dos_m65/unit_ramdisk/unit_rd_init.s

@@ -39,41 +39,48 @@ unit_rd_init_test_ram:                 ; non-destructive ATTIC/CELLAR RAM test
 
 	; For the start, mark extended RAM as not present
 
+	stx RD_STARTSEG                    ; by default $FF, to mark no RAM disk
 	inx
+	stx RD_MAXTRACK                    ; maximum allowed track number, for now set 0
 	stx RAM_ATTIC                      ; set ATTIC/CELLAR RAM as not present
 	stx RAM_CELLAR
 
-	; Prepare address - ATTIC RAM, $0800:$0000
+	; Prepare address - CELLAR RAM, $0880:$0000
 
 	stx PNTR+0
 	stx PNTR+1
-	stx PNTR+2
+	lda #$80
+	sta PNTR+2
 	lda #$08
 	sta PNTR+3
 
 	ldz #$00
 
+	; Test for CELLAR RAM
+
+	jsr @perform_ram_test
+	bne @done_cellar
+	dec RAM_ATTIC                      ; test passed
+	lda #$08
+	sta RD_STARTSEG                    ; RAM DISK start segment - CELLAR RAM
+
+@done_cellar:
+
+	; Prepare address - ATTIC RAM, $0800:$0000
+
+	lda #$00
+	sta PNTR+2
+
 	; Test for ATTIC RAM
 
 	jsr @perform_ram_test
 	bne @done_attic
-	dec RAM_ATTIC                      ; test passed
+	dec RAM_CELLAR                     ; test passed
+	lda #$00
+	sta RD_STARTSEG                    ; RAM DISK start segment - ATTIC RAM
 
 @done_attic:
 
-	; Prepare address - CELLAR RAM, $0880:$0000
-
-	lda #$80
-	sta PNTR+2
-
-	; Test for cellar RAM
-
-	jsr @perform_ram_test
-	bne @done_cellar
-	dec RAM_CELLAR                     ; test passed
-
-@done_cellar:
-
 	; Restore temporary address area content
 
 	ldx #$00
@@ -84,6 +91,10 @@ unit_rd_init_test_ram:                 ; non-destructive ATTIC/CELLAR RAM test
 	cpx #$04
 	bne @3
 
+	; Clear RAM disk device number if no Hyper RAM available
+
+	jsr util_check_rd_ram
+
 	; End of initialization
 
 	rts

src/dos_m65/unit_ramdisk/unit_rd_preload.s

@@ -6,6 +6,11 @@
 
 unit_rd_preload:
 
+	; Check if RAM disk is enabled
+
+	lda UNIT_RAMDISK
+	beq @error_no_ramdisk
+
 	; XXX make sure attic RAM is present
 
 	rts ; XXX remove when code is fully implemented
@@ -28,6 +33,11 @@ unit_rd_preload:
 
 	; XXX load the file
 
+	; XXX while loading set RD_MAXTRACK
+
+@load_track:
+
+	; XXX while loading set RD_MAXTRACK
 
 
 
@@ -42,6 +52,12 @@ unit_rd_preload:
 
 @error_not_found:
 
-	; XXX set information about file not found
+	; XXX set error information
+
+	rts
+
+@error_no_ramdisk:
+
+	; XXX set error information
 
 	rts

src/dos_m65/utils/util_check_rd_ram.s

@@ -0,0 +1,21 @@
+
+; If no Hyper RAM is present, clear the RAM DISK device number and set Carry
+
+
+util_check_rd_ram:
+
+	lda RAM_ATTIC
+	ora RAM_CELLAR
+	beq @no_hyperram
+
+	clc
+	rts
+
+
+@no_hyperram:
+
+	lda #$00
+	sta UNIT_RAMDISK
+
+	sec
+	rts

src/kernal/iec/load_iec.s

@@ -92,7 +92,7 @@ load_iec:
 	sta EAL+1
 
 !ifdef CONFIG_MB_M65 {
-	load_iec_m65cont:
+load_iec_m65cont:
 }
 
 	; If secondary address is 0, override EAL with STAL