From e89cb654963438686d9c23f58b4ca0b1f7282165 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sun, 27 Jan 2019 19:32:33 +0000
Subject: [PATCH] sc108: fix boot loader update other code

Still has a weird crash to dig into
---
 Kernel/platform-sc108/README   | 15 ++++++++++-----
 Kernel/platform-sc108/loader.s | 12 ++++++------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/Kernel/platform-sc108/README b/Kernel/platform-sc108/README
index 1cd6250e..6c10bb69 100644
--- a/Kernel/platform-sc108/README
+++ b/Kernel/platform-sc108/README
@@ -1,4 +1,4 @@
-Experimental port for the proposed SC108 mainboard plus CF card plus RTC card
+Experimental port for the SC108 mainboard plus CF card plus RTC or CTC card
 
 This is a design that happens to have 128K RAM but the 64K banks are flipped
 directly. Fortunately there is a ROM which lives in both banks.
@@ -84,13 +84,18 @@ F300-FFFF	Common (mostly valid in both banks)
 
 TO DO
 
-Write a proper bootloader that can use partition tables properly
-Fix hardcoded use of ACIA
+Debug some crash cases we have from the latest updates
+
 Use the extra space to put back some kernel bits we binned from -tiny
 Build a suitably high CP/M emuation and test it
 
-
 Long term fun
 - OS core in ROM, high memory holding rest (like -tiny) but with two user space
 banks ??
-- Clean up the serial code (on all RC2014)
+
+
+Emulation
+
+Write the bootloader once to block 0 (repair the parition tables afterwards)
+Write kernel images to block 24
+rc2014 -m sc108 -r sc108.rom -s -i sc108.ide -c
\ No newline at end of file
diff --git a/Kernel/platform-sc108/loader.s b/Kernel/platform-sc108/loader.s
index 686ec30b..330a70ee 100644
--- a/Kernel/platform-sc108/loader.s
+++ b/Kernel/platform-sc108/loader.s
@@ -30,8 +30,8 @@ BUSY		.equ	7
 
 ATA_READ	.equ	0x20
 
-SIOB_C		.equ	3
-SIOB_D		.equ	1
+SIOA_C		.equ	0x80
+SIOA_D		.equ	0x81
 
 	.ds 10240	; boot sector and more for loader space
 
@@ -95,13 +95,13 @@ serout:
 	; wait for transmitter to be idle
 ocloop_sio:
         xor a                   ; read register 0
-        out (SIOB_C), a
-	in a,(SIOB_C)		; read Line Status Register
+        out (SIOA_C), a
+	in a,(SIOA_C)		; read Line Status Register
 	and #0x04			; get THRE bit
 	jr z,ocloop_sio
 	; now output the char to serial port
 	pop af
-	out (SIOB_D),a
+	out (SIOA_D),a
 	ret
 
 serstr:
@@ -113,6 +113,6 @@ serstr:
 	jr serstr
 
 hello:
-	.asciz 'LiNC80 FUZIX LOADER 0.1\n\n'
+	.asciz 'SC108 FUZIX LOADER 0.1\n\n'
 gogogo:
 	.asciz '\nExecuting FUZIX...\n'
-- 
2.34.1