diff options
Diffstat (limited to 'data/mmuinit.pl')
| -rwxr-xr-x | data/mmuinit.pl | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/data/mmuinit.pl b/data/mmuinit.pl index 389c89f..fb04118 100755 --- a/data/mmuinit.pl +++ b/data/mmuinit.pl @@ -20,7 +20,7 @@ # 1 - Flash ROM # 2 - Video RAM # 3 - Character generator RAM -# 4 - Reserved +# 4 - Block graphics RAM # 5 - Reserved # 6 - Reserved # 7 - Hyperspace (reads bits[7:0], writes nowhere) @@ -29,6 +29,7 @@ # $testram = 0; +$with_bgram = 1; sub do_ram() { if ( $testram ) { @@ -60,9 +61,12 @@ $a = 0; for ( $i = 0x00 ; $i < 0x40 ; $i++ ) { # BASIC printf("%03X : %04X;\n", $a++, 0x9000|$i); } -for ( $i = 0x40 ; $i < 0x60 ; $i++ ) { # Free for expansion +for ( $i = 0x40 ; $i < 0x48 ; $i++ ) { # Free for expansion printf("%03X : %04X;\n", $a++, 0x70FF); } +for ( $i = 0x48 ; $i < 0x60 ; $i++ ) { # Free for expansion or bgram + printf("%03X : %04X;\n", $a++, $with_bgram ? 0x4000|($i-0x48) : 0x70FF); +} for ( $i = 0x60 ; $i < 0x74 ; $i++ ) { # DOS, IEC options printf("%03X : %04X;\n", $a++, 0x1000|$i); } @@ -84,7 +88,13 @@ do_ram(); for ( $i = 0x00 ; $i < 0x40 ; $i++ ) { # BASIC (in RAM) printf("%03X : %04X;\n", $a++, 0x8000|$i); } -for ( $i = 0x40 ; $i < 0x74 ; $i++ ) { # Various ROMs (in RAM) +for ( $i = 0x40 ; $i < 0x48 ; $i++ ) { # Expansion (fill with RAM) + printf("%03X : %04X;\n", $a++, 0x0000|$i); +} +for ( $i = 0x48 ; $i < 0x60 ; $i++ ) { # RAM or bgram + printf("%03X : %04X;\n", $a++, $with_bgram ? 0x4000|($i-0x48) : 0x0000|$i); +} +for ( $i = 0x60 ; $i < 0x74 ; $i++ ) { # DOS and IEC (in RAM) printf("%03X : %04X;\n", $a++, 0x0000|$i); } for ( $i = 0x74 ; $i < 0x78 ; $i++ ) { # Video RAM (for 80 col only) |