ALU8IMM

diff --git a/GBZ80Core.v b/GBZ80Core.v
index 36cd76af6f6af77895762676654481cac11fc087..af5574fd2892cd056bcb3a2c1d1da16d9f654fe5 100644 (file)
--- a/GBZ80Core.v
+++ b/GBZ80Core.v
@@ -52,6 +52,7 @@
 `define INSN_LDH_AC            8'b111x0010     // Either LDH A,(C) or LDH (C),A
 `define INSN_LDx_AHL           8'b001xx010     // LDD/LDI A,(HL) / (HL),A
 `define INSN_ALU8              8'b10xxxxxx     // 10 xxx yyy
+`define INSN_ALU8IMM           8'b11xxx110
 `define INSN_NOP               8'b00000000
 `define INSN_RST               8'b11xxx111
 `define INSN_RET               8'b110x1001     // 1 = RETI, 0 = RET

diff --git a/Uart.v b/Uart.v
index 3dd15323fd012ee5d9357038989790776f919bfc..af173ca63281605658f6f20c97ec4b88fce3a252 100644 (file)
--- a/Uart.v
+++ b/Uart.v
@@ -1,5 +1,5 @@
 `define IN_CLK 8388608
-`define OUT_CLK 9600
+`define OUT_CLK 57600
 `define CLK_DIV `IN_CLK / `OUT_CLK
 `define MMAP_ADDR 16'hFF50
 

diff --git a/diag.asm b/diag.asm
index 004935ab0dc80372af5aed45621ee2fc2bc66304..28fce997faa6229368ced11d2339e3c536590264 100644 (file)
--- a/diag.asm
+++ b/diag.asm
@@ -49,21 +49,16 @@ irqhand:
        
        ld hl, $DF81
        ld a, [hl]
-       ld b, 1
-       add b
+       add 1
        ld c, $51
        ld [c], a
        ld [hl], a
 
-
        POP HL
        POP DE
        POP BC
        POP AF
        RETI
-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE
-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE
-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE
 
 ; Memory tester: writes h ^ l to all addresses from C000 to DF80.
 memtest:
@@ -75,11 +70,11 @@ memtest:
        ld a,h
        xor l
        ld [hli],a
-       ld a, $DF
-       cp h
+       ld a, h
+       cp $DF
        jr nz, .wr
-       ld a, $80
-       cp l
+       ld a, l
+       cp $80
        jr nz, .wr
 
        ld hl, $C001            ; Read loop
@@ -91,11 +86,11 @@ memtest:
        cp b
        jr nz, .memfail
        
-       ld a, $DF
-       cp h
+       ld a, h
+       cp $DF
        jr nz, .rd
-       ld a, $80
-       cp l
+       ld a, l
+       cp $80
        jr nz, .rd
        
        ld hl, testokstr        ; Say we're OK
@@ -130,16 +125,12 @@ puthex:                           ; Put two hex nibbles to the serial console.
        rra
        rra
        rra
-       ld b,$0F
-       and b
-       ld b,$30
-       add b
+       and $0F
+       add $30
        call putc
        pop af
-       ld b,$0F
-       and b
-       ld b,$30
-       add b
+       and $0F
+       add $30
        call putc
        ret
 
@@ -152,14 +143,13 @@ waitsw:
        xor a
        ld [c],a
        
-       ld b, $0
 .loop1:
        ld a,[c]
-       cp b
+       cp $0
        jr z,.loop1
 .loop2:
        ld a,[c]
-       cp b
+       cp $0
        jr nz,.loop2
        ret
 
@@ -203,8 +193,7 @@ insntest:
 
        ; Test JR
        ld a, $FF
-       ld b, $00
-       cp b
+       cp $0
        jr nz,.jr
        ld hl, .jrfail
        jr .fail
@@ -226,20 +215,17 @@ insntest:
        ; Test CP.
        ld hl, .cpfail
        ld a, $10
-       ld b, $20
-       cp b
+       cp $20
        jr nc,.fail
        ld a, $20
-       ld b, $10
-       cp b
+       cp $10
        jr c,.fail
        
        ; Test CPL
        ld hl, .cplfail
        ld a, $55
-       ld b, $AA
        cpl
-       cp b
+       cp $AA
        jr nz,.fail
        
        ld hl, .ok
@@ -275,12 +261,11 @@ insntest:
 
 ; Serial port manipulation functions.
 putc:
-       ld b, 0
        ld c, $50
        push af
 .waitport:
        ld a,[c]
-       cp b
+       cp $00
        jr nz,.waitport
        pop af
        ld [c],a
@@ -288,8 +273,7 @@ putc:
 
 puts:
        ld a, [hli]
-       ld b, $00
-       cp b
+       cp $00
        ret z
        call putc
        jr puts

diff --git a/insn_alu8.v b/insn_alu8.v
index 161418b85c284368e69e882fe8cd6966e099a059..b6d4c636820f8c95c337a81a439ae5dd9831fa48 100644 (file)
--- a/insn_alu8.v
+++ b/insn_alu8.v
@@ -1,6 +1,9 @@
 `ifdef EXECUTE
-       `INSN_ALU8: begin
-               if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0))
+       `INSN_ALU8,`INSN_ALU8IMM: begin
+               if ((opcode[7:6] == 2'b11) && (cycle == 0)) begin       // alu8imm
+                       `EXEC_INC_PC
+                       `EXEC_READ(`_PC + 1)
+               end else if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0))
                        `EXEC_READ(`_HL)
                else begin
                        `EXEC_NEWCYCLE
@@ -20,8 +23,8 @@
 `endif
 
 `ifdef WRITEBACK
-       `INSN_ALU8: begin
-               if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0)) begin
+       `INSN_ALU8,`INSN_ALU8IMM: begin
+               if (((opcode[2:0] == `INSN_reg_dHL) || (opcode[7:6] == 2'b11)) && (cycle == 0)) begin
                        /* Sit on our asses. */
                end else begin          /* Actually do the computation! */
                        case (opcode[5:3])

diff --git a/rom.asm b/rom.asm
index 0c25faba8bed2c5e703cf912f20a5781e64c65fd..cf8fd603c2fbfeebf5c65d591c7eec4788dcb396 100644 (file)
--- a/rom.asm
+++ b/rom.asm
@@ -44,8 +44,7 @@ irqhand:
        
        ld hl, $DF81
        ld a, [hl]
-       ld b, 1
-       add b
+       add 1
        ld c, $51
        ld [c], a
        ld [hl], a