From: Alan Cox <alan@linux.intel.com>
Date: Fri, 6 Jul 2018 21:21:58 +0000 (+0100)
Subject: trs80m1: fix up model 3 NMI vector (its a JP xx xx) and turn it off at boot
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=53cb740c14e7118502d4a397b513284864a18c4e;p=FUZIX.git

trs80m1: fix up model 3 NMI vector (its a JP xx xx) and turn it off at boot

Otherwise a couple of seconds in we get an NMI that randomly eats AF
---

diff --git a/Kernel/platform-trs80m1/trs80.s b/Kernel/platform-trs80m1/trs80.s
index 85b7e51f..c50ad7ab 100644
--- a/Kernel/platform-trs80m1/trs80.s
+++ b/Kernel/platform-trs80m1/trs80.s
@@ -97,8 +97,8 @@ init_early:
 	    ld (_trs80_model),a
 	    ld a,#0x74
 	    out (0xE0),a	; Mask iobus, cassette
-	    ld a,#0x40
-	    out (0xE4),a	; and NMI sources except motor off
+	    xor a
+	    out (0xE4),a	; and NMI sources
 	    jr not_vg
 not_m3:
 	    ; Detect machine type (Model 1 or LNW80 or VideoGenie ?)
@@ -186,7 +186,7 @@ _rom_vectors:
 
 	    ; Model III only but just writing it does no harm
 	    ld hl,#fd_nmi_handler
-	    ld (0x4049), hl
+	    ld (0x404A), hl
 	    jp map_kernel
 	    
 ; outchar: Wait for UART TX idle, then print the char in A