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fix possible crash in VIC II setup routine

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FeralChild64 committed 2019-09-26 15:38:49 +02:00
1 parent 041a4750dd
commit 94b8e0dc29
3 files changed
+14 -13
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STATUS.md
+11 -11
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@@ -146,16 +146,16 @@ Not all of them - only these we want to have implemented.
<br />
| Address | Name | Status | Remarks |
| :-------: | :--------------- | :------: | :------------------------------------------------: |
| `$E544` | clear screen | DONE | |
| `$E5A0` | setup VIC II | DONE | |
| `$EA31` | default IRQ | PARTIAL | |
| `$EA7E` | ack CIA1 + below | DONE | |
| `$EA81` | ret from IRQ/NMI | DONE | |
| `$FD30` | default vectors | DONE | |
| `$FE47` | default NMI | PARTIAL | |
| `$FE66` | default BRK | DONE | |
| `$FF80` | revision byte | DONE | |
| Address | Name | Status | Remarks |
| :-------: | :---------------- | :------: | :------------------------------------------------: |
| `$E544` | clear screen | DONE | |
| `$E5A0` | setup VIC II & IO | PARTIAL | |
| `$EA31` | default IRQ | PARTIAL | |
| `$EA7E` | ack CIA1 + below | DONE | |
| `$EA81` | ret from IRQ/NMI | DONE | |
| `$FD30` | default vectors | DONE | |
| `$FE47` | default NMI | PARTIAL | |
| `$FE66` | default BRK | DONE | |
| `$FF80` | revision byte | DONE | |
<br />
c64/kernal/e5a0.setup_vicii.s
+3 -1
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@@ -1,6 +1,8 @@
setup_vicii:
// XXX there is more to setup within this routine
// Set up default IO values (Compute's Mapping the 64 p215)
lda #$1B // Enable text mode
sta VIC_SCROLY
@@ -17,4 +19,4 @@ setup_vicii:
lda #$00
sta VIC_SPENA
// FALLTROUGH
rts
c64/kernal/interrupts/fe66.default_brk_handler.s
-1
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@@ -12,4 +12,3 @@ default_brk_handler:
cli
jmp (IBASIC_WARM_START)