sc108: fix boot loader update other code

Still has a weird crash to dig into

diff --git a/Kernel/platform-sc108/README b/Kernel/platform-sc108/README
index 1cd6250..6c10bb6 100644 (file)
--- 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 686ec30..330a70e 100644 (file)
--- 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'