cleanup

src/zvm_m65/zvm_bios.s

@@ -53,18 +53,42 @@ zvm_BIOS_00_BOOT:            ; Cold start
 
 	; XXX !!!
 
+	; XXX fetch RAM disk image
+	; XXX close all the files, reset I/O, set screen mode
+	; XXX clear memory
+
+	; Reset registers and internal emulation data
+	
+	ldz #$00     	         ; .Z is required to be 0 all the time
+	lda #$00
+	tay
+@1:
+	sta REG_AF, y
+	iny
+	cmp #(REG_IFF2+1)
+	bne @1
+
+	dew REG_AF               ; AF and SP have $FFFF value on start
+	dew REG_SP
+
+	; XXX load CPM3.SYS
+
 	; FALLTROUGH
 
 zvm_BIOS_01_WBOOT:           ; Warm start
 zvm_BIOS_31_RESERV1:         ; Reserved   
 zvm_BIOS_32_RESERV2:         ; Reserved
 
-	; Reset BIOS vectors to point to bank 1
-
-	; XXX setup VEC_MOVE_fetch, VEC_MOVE_store, VEC_DISKIO_store
-
 	; XXX !!!
 
+	; Select bank 1 as the default one
+
+	jsr ZVM_set_bank_1
+
+	; XXX put command processor in memory
+
+	; XXX setup VEC_MOVE_fetch, VEC_MOVE_store, VEC_DISKIO_store somewhere
+
 zvm_BIOS_02_CONST:           ; Check if input character available
 
 	; XXX !!!

src/zvm_m65/zvm_core.s

@@ -5,27 +5,8 @@
 
 ZVM_entry:
 
-	jsr ZVM_init
-	; XXX fetch BDOS and Command Processor 
-	jmp ZVM_next
-
-ZVM_init:
-
-	; Reset registers and internal data
-	
-	ldz #$00     	         ; .Z is required to be 0 all the time
-	lda #$00
-	tay
-@1:
-	sta REG_AF, y
-	iny
-	cmp #(REG_IFF2+1)
-	bne @1
-	
-	; XXX what is the initial SP value?
-	; XXX clean memory
-
-	jmp ZVM_set_bank_1
+	; XXX mark that this is the first start of CP/M iin the lifecycle, display BIOS information
+	jmp zvm_BIOS_00_BOOT
 
 ZVM_store_next:
 
@@ -91,6 +72,24 @@ Z80_instr_FD:      +ZVM_DISPATCH Z80_vectab_FD_0, Z80_vectab_FD_1              ;
 
 
 
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