Mercurial > hg > Members > kono > nitros9-code
changeset 1832:4ea2e417a48e
Fix for non-booting Alpha port.
| author | afra |
|---|---|
| date | Sun, 08 May 2005 20:16:14 +0000 |
| parents | 6fe4ae830c4d |
| children | ed9f51e468fa |
| files | level1/modules/boot_d64.asm level1/modules/ddisk.asm |
| diffstat | 2 files changed, 7 insertions(+), 6 deletions(-) [+] |
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--- a/level1/modules/boot_d64.asm Sun May 08 20:14:46 2005 +0000 +++ b/level1/modules/boot_d64.asm Sun May 08 20:16:14 2005 +0000 @@ -12,6 +12,8 @@ * * Double sided Disk code added 2004-11-25, P.Harvey-Smith. * +* 2005-05-08, P.Harvey-Smith, added code to force 5/8 line low on +* Alpha so correct clock selected. * nam Boot ttl os9 system module @@ -449,9 +451,9 @@ andb #%11111100 ; mask out drive number stb ,s ora ,s ; recombine + anda #Mask58 ; make sure 5/8 bit forced low to select 5.25" clock sta ,s - lda #AYIOREG ; AY-8912 IO register sta PIA2DB ; Output to PIA ldb #AYREGLatch ; Latch register to modify
--- a/level1/modules/ddisk.asm Sun May 08 20:14:46 2005 +0000 +++ b/level1/modules/ddisk.asm Sun May 08 20:16:14 2005 +0000 @@ -16,7 +16,7 @@ * I am not sure of how to disable NMI on the Alpha, it is * simulated in software using the NMIFlag. * -* The Dragon Alpha/Professional uses the same FDC chip as +* The Dragon Alpha/Professional uses the same FDC chip as * DragonDos, however it is mapped between FF2C and FF2F, * also the register order is REVERSED, so command/status is at * FF2F. @@ -102,7 +102,7 @@ MotorOn EQU MotorOnA ; These are the bits that we know the function of on the Alpha interface -KnownBits EQU Drive0A+Drive1A+Drive2A+Drive3A+MotorOnA+WPCEnA +KnownBits EQU Drive0A+Drive1A+Drive2A+Drive3A+MotorOnA+SDensEnA+WPCEnA ELSE @@ -949,9 +949,8 @@ clra ; No, turn off other bits. MotorRunning - anda #KnownBits ; Mask out bits we do not know the function of - sta ,s - + anda #Mask58 ; Mask out 5/8 bit to force the use of 5.25" clock + sta ,s lda #AYIOREG ; AY-8912 IO register sta PIA2DB ; Output to PIA