Add Seconds Counter to HBIOS

Doc/ChangeLog.txt

@@ -28,6 +28,7 @@ Version 2.9.2
 - WBW: Updated FAT to add MD and FORMAT commands
 - WBW: Add CP/M 3 (experimental)
 - M?T: Support Shift register SPI WIZNET for RC2014
+- WBW: Added seconds register in HBIOS
 
 Version 2.9.1
 -------------

ReadMe.txt

@@ -7,7 +7,7 @@
 ***********************************************************************
 
 Wayne Warthen (wwarthen@gmail.com)
-Version 2.9.2-pre.18, 2019-10-14
+Version 2.9.2-pre.19, 2019-10-14
 https://www.retrobrewcomputers.org/
 
 RomWBW is a ROM-based implementation of CP/M-80 2.2 and Z-System for 

Source/Apps/Timer.asm

@@ -19,6 +19,7 @@
 ; Change Log:
 ;   2018-01-14 [WBW] Initial release
 ;   2018-01-17 [WBW] Add HBIOS check
+;   2019-11-08 [WBW] Add seconds support
 ;_______________________________________________________________________________
 ;
 ; ToDo:
@@ -41,6 +42,7 @@ rmn	.equ	9		; intended CBIOS version - minor
 bf_sysver	.equ	$F1	; BIOS: VER function
 bf_sysget	.equ	$F8	; HBIOS: SYSGET function
 bf_sysgettimer	.equ	$D0	; TIMER subfunction
+bf_sysgetsecs	.equ	$D1	; SECONDS subfunction
 ;
 ;===============================================================================
 ; Code Section
@@ -127,7 +129,18 @@ process1a:
 	ld	a,l		; new LSB value to A
 	ld	(last),a	; save as last value
 	call	prtcr		; back to start of line
-	call	nz,prthex32	; display it
+	;call	nz,prthex32	; display it
+	call	prthex32	; display it
+	ld	de,strtick	; tag
+	call	prtstr		; display it
+
+	; get and print seconds value
+	ld	b,bf_sysget	; HBIOS SYSGET function
+	ld	c,bf_sysgetsecs	; SECONDS subfunction
+	rst	08		; call HBIOS, DE:HL := seconds value
+	call	prthex32	; display it
+	ld	de,strsec	; tag
+	call	prtstr		; display it
 ;
 process2:
 	ld	a,(cont)	; continuous display?
@@ -463,8 +476,8 @@ stack	.equ	$		; stack top
 ;
 ; Messages
 ;
-msgban	.db	"TIMER v1.0, 14-Jan-2018",13,10
-	.db	"Copyright (C) 2018, Wayne Warthen, GNU GPL v3",0
+msgban	.db	"TIMER v1.1, 8-Nov-2019",13,10
+	.db	"Copyright (C) 2019, Wayne Warthen, GNU GPL v3",0
 msguse	.db	"Usage: TIMER [/C] [/?]",13,10
 	.db	"  ex. TIMER           (display current timer value)",13,10
 	.db	"      TIMER /?        (display version and usage)",13,10
@@ -472,5 +485,7 @@ msguse	.db	"Usage: TIMER [/C] [/?]",13,10
 msgprm	.db	"Parameter error (TIMER /? for usage)",0
 msgbio	.db	"Incompatible BIOS or version, "
 	.db	"HBIOS v", '0' + rmj, ".", '0' + rmn, " required",0
+strtick	.db	" Ticks, ",0
+strsec	.db	" Seconds",0
 ;
 	.end

Source/CBIOS/ver.inc

@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.18"
+#DEFINE BIOSVER	"2.9.2-pre.19"

Source/HBIOS/API.txt

@@ -57,6 +57,10 @@ GET ($F8):
       BC=Function/Subfunction                   A=Result
                                                 DE:HL=Timer Value (32 bit)
 
+    SECONDS ($D1):
+      BC=Function/Subfunction                   A=Result
+                                                DE:HL=Seconds Value (32 bit)
+
     BOOTINFO ($E0):
       BC=Function/Subfunction                   A=Result
                                                 DE=Boot Volume (Disk Unit/Slice)
@@ -85,6 +89,10 @@ SET ($F9):
       BC=Function/Subfunction                   A=Result
       DE:HL=Timer Value (32 bit)
 
+    SECONDS ($D1):
+      BC=Function/Subfunction                   A=Result
+      DE:HL=Seconds Value (32 bit)
+
     BOOTINFO ($E0):
       BC=Function/Subfunction                   A=Result
       DE=Boot Volume (Disk Unit/Slice)

Source/HBIOS/hbios.asm

@@ -2368,6 +2368,8 @@ SYS_GET:
 	JR	Z,SYS_GETVDACNT
 	CP	BF_SYSGET_TIMER
 	JR	Z,SYS_GETTIMER
+	CP	BF_SYSGET_SECS
+	JR	Z,SYS_GETSECS
 	CP	BF_SYSGET_BOOTINFO
 	JR	Z,SYS_GETBOOTINFO
 	CP	BF_SYSGET_CPUINFO
@@ -2391,6 +2393,18 @@ SYS_GETTIMER:
 	XOR	A
 	RET
 ;
+; GET SECONDS
+;   RETURNS:
+;     DE:HL: SECONDS VALUE (32 BIT)
+;
+SYS_GETSECS:
+	LD	HL,HB_SECS
+	HB_DI
+	CALL	LD32
+	HB_EI
+	XOR	A
+	RET
+;
 ; GET BOOT INFORMATION
 ;   RETURNS:
 ;     L: BOOT BANK ID
@@ -2473,6 +2487,8 @@ SYS_SET:
 	LD	A,C			; GET REQUESTED SUB-FUNCTION
 	CP	BF_SYSSET_TIMER
 	JR	Z,SYS_SETTIMER
+	CP	BF_SYSSET_SECS
+	JR	Z,SYS_SETSECS
 	CP	BF_SYSSET_BOOTINFO
 	JR	Z,SYS_SETBOOTINFO
 	OR	$FF			; SIGNAL ERROR
@@ -2502,6 +2518,18 @@ SYS_SETTIMER:
 	XOR	A
 	RET
 ;
+; SET SECS
+;   ON ENTRY:
+;     DE:HL: TIMER VALUE (32 BIT)
+;
+SYS_SETSECS:
+	LD	BC,HB_SECS
+	HB_DI
+	CALL	ST32
+	HB_EI
+	XOR	A
+	RET
+;
 ; RETURN A BYTE OF MEMORY FROM SPECIFIED BANK
 ; ENTRY: D=BANK ID, HL=ADDRESS
 ; RETURN: E=BYTE VALUE
@@ -2687,16 +2715,7 @@ HB_IM1PTR	.DW	HB_IVT		; POINTER FOR NEXT IM1 ENTRY
 HB_TIMINT:
 	; INCREMENT TICK COUNTER (32 BIT)
 	LD	HL,HB_TICKS		; POINT TO TICK COUNTER
-	INC	(HL)
-	JR	NZ,HB_TIMINT1
-	INC	HL
-	INC	(HL)
-	JR	NZ,HB_TIMINT1
-	INC	HL
-	INC	(HL)
-	JR	NZ,HB_TIMINT1
-	INC	HL
-	INC	(HL)
+	CALL	INC32HL
 ;
 HB_TIMINT1:
 ;
@@ -2716,6 +2735,17 @@ TEMPCNT	.DB	250
 #ENDIF
 ;
 HB_TIMINT2:
+	LD	HL,HB_SECTCK		; POINT TO SECONDS TICK COUNTER
+	DEC	(HL)			; COUNTDOWN 50 TICKS
+	JR	NZ,HB_TIMINT3		; NOT ZERO YET, DONE FOR THIS CYCLE
+	; 50 TICKS HAVE ELAPSED
+	LD	A,50			; 50 TICKS PER SECOND
+	LD	(HL),A			; RESET COUNTDOWN REGISTER
+	; INCREMENT SECONDS COUNTER
+	LD	HL,HB_SECS		; POINT TO SECONDS COUNTER
+	CALL	INC32HL
+;
+HB_TIMINT3:
 ;
 #IF (CPUFAM == CPU_Z180)
 	; ACK/RESET Z180 TIMER INTERRUPT
@@ -4019,6 +4049,8 @@ IDLECOUNT	.DB	0
 HEAPCURB	.DW	0		; MARK HEAP ADDRESS AFTER INITIALIZATION
 ;
 HB_TICKS	.FILL	4,0		; 32 BIT TICK COUNTER
+HB_SECTCK	.DB	50		; TICK COUNTER FOR SECONDS
+HB_SECS		.FILL	4,0		; 32 BIT SECONDS COUNTER
 ;
 HB_CPUTYPE	.DB	0		; 0=Z80, 1=80180, 2=SL1960, 3=ASCI BRG
 ;

Source/HBIOS/hbios.inc

@@ -71,12 +71,14 @@ BF_SYSGET_CIOCNT	.EQU	$00	; GET CHAR UNIT COUNT
 BF_SYSGET_DIOCNT	.EQU	$10	; GET DISK UNIT COUNT
 BF_SYSGET_VDACNT	.EQU	$40	; GET VDA UNIT COUNT
 BF_SYSGET_TIMER		.EQU	$D0	; GET CURRENT TIMER VALUE
+BF_SYSGET_SECS		.EQU	$D1	; GET CURRENT SECONDS VALUE
 BF_SYSGET_BOOTINFO	.EQU	$E0	; GET BOOT INFORMATION
 BF_SYSGET_CPUINFO	.EQU	$F0	; GET CPU INFORMATION
 BF_SYSGET_MEMINFO	.EQU	$F1	; GET MEMORY CAPACTITY INFO
 BF_SYSGET_BNKINFO	.EQU	$F2	; GET BANK ASSIGNMENT INFO
 ;
 BF_SYSSET_TIMER		.EQU	$D0	; SET TIMER VALUE
+BF_SYSSET_SECS		.EQU	$D1	; SET SECONDS VALUE
 BF_SYSSET_BOOTINFO	.EQU	$E0	; SET BOOT INFORMATION
 ;
 BF_SYSINT_INFO		.EQU	$00	; GET INTERRUPT SYSTEM INFO

Source/HBIOS/ver.inc

@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	2
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.2-pre.18"
+#DEFINE BIOSVER	"2.9.2-pre.19"