Peripheral 4 Setting Register: Difference between revisions

Revision as of 21:22, 3 October 2019

Number	TBRegisterNumber::$09
Readable	TBRegisterReadable::Yes
Writable	TBRegisterWritable::Yes
Short Description	ShortDesc::Sets scanlines, AY mono output, Sprite-id lockstep, disables Kempston and divMMC ports.

Bit	Function
7	Enables AY2 "mono" output (A+B+C is sent to both R and L channels, makes it a bit louder than stereo mode).
6	Enables AY1 "mono" output (1 = mono, 0 default)
5	Enables AY0 "mono" output
4	Sprite id lockstep (1 = {{#ask: TBRegisterNumber::$34 }} ($34) and {{#ask: PortNumber::$303B }} ($303B{{#ask: PortNumber::$303B \|mainlabel=- \|headers=hide \|intro= / \|?NumberDec#- }}) are in lockstep, 0 default)
3	(core 2.0) Disables Kempston mouse port ($DF) if set (core 3.0) 1 to reset mapram bit in divmmc
2	(core 2.0) Disables divMMC ports ($E3, $E7, $EB) if set (core 3.0) Reserved, use 0
1-0	scanlines configuration (0 after a PoR or Hard-reset): %00 = scanlines off, %01 = scanlines 75%, %10 = scanlines 50%, %11 = scanlines 25%

@@ Line 16: / Line 16: @@
 | 4 || Sprite id lockstep (1 = {{NextRegNo|$34}} and {{PortNo|$303B}} are in lockstep, 0 default)
 |-
-| 3 || Disables Kempston mouse port ($DF) if set
+| 3 || (core 2.0) Disables Kempston mouse port ($DF) if set
+(core 3.0) 1 to reset mapram bit in divmmc
 |-
-| 2 || Disables divMMC ports ($E3, $E7, $EB) if set
+| 2 || (core 2.0) Disables divMMC ports ($E3, $E7, $EB) if set
+(core 3.0) Reserved, use 0
 |-
 | 1-0 || scanlines configuration (0 after a PoR or Hard-reset):
 %00 = scanlines off, %01 = scanlines 75%, %10 = scanlines 50%, %11 = scanlines 25%
 |}