Fix c99 Z80 impl to accept ZEXALL test.

okean240/fdc/fdc.go

@@ -304,16 +304,12 @@ func (f *FloppyDriveController) Drq() byte {
 }
 
 func (f *FloppyDriveController) LoadFloppy() {
-	log.Debug("Load Floppy B")
 	loadFloppy(&f.sectors[0], f.floppyBFile)
-	log.Debug("Load Floppy C")
 	loadFloppy(&f.sectors[1], f.floppyCFile)
 }
 
 func (f *FloppyDriveController) SaveFloppy() {
-	log.Debug("Save Floppy B")
 	saveFloppy(&f.sectors[0], f.floppyBFile)
-	log.Debug("Save Floppy C")
 	saveFloppy(&f.sectors[1], f.floppyCFile)
 }
 
@@ -373,8 +369,7 @@ func (f *FloppyDriveController) Sector() byte {
 	return f.sectorNo
 }
 
-//
-
+// loadFloppy load floppy image to sector buffer from file
 func loadFloppy(sectors *[SizeInSectors]SectorType, fileName string) {
 	log.Debugf("Load Floppy content from file %s.", fileName)
 	file, err := os.Open(fileName)

z80/c99/helper.go

@@ -2,19 +2,6 @@ package c99
 
 import log "github.com/sirupsen/logrus"
 
-// GetBit return bit "n" from byte "val"
-func getBit(n byte, val byte) byte {
-	return ((val) >> (n)) & 1
-}
-
-func getBit3(val byte) bool {
-	return (val & 0x08) != 0
-}
-
-func getBit5(val byte) bool {
-	return (val & 0x20) != 0
-}
-
 func (z *Z80) rb(addr uint16) byte {
 	return z.core.MemRead(addr)
 }

z80/c99/opcodes.go

@@ -356,7 +356,8 @@ func (z *Z80) ldi() {
 	// for the calculation of xf/yf on LDI
 	result := val + z.a
 
-	z.updateXY(result)
+	z.xf = result&0x08 != 0 // bit 3
+	z.yf = result&0x02 != 0 // bit 1
 
 	z.nf = false
 	z.hf = false