archive notice

README.md

@@ -1,5 +1,13 @@
 # chibi pc-09
 
+## Archived!
+
+This repo has been archived, and the different parts have been migrated to other repos.
+
+The PCB for prototype 1 has been moved to https://gitea.ambersplace.net/chibi/pc09-prototype-1
+
+The firmware has been moved to https://gitea.ambersplace.net/chibi/chibi-firmware
+
 ![Gitea last commit](https://img.shields.io/gitea/last-commit/amberisvibin/chibi-pc09?gitea_url=https%3A%2F%2Fgitea.ambersplace.net&style=for-the-badge&label=Last%20Gitea%20Commit)
 ![GitHub last commit](https://img.shields.io/github/last-commit/amberisvibin/chibi-pc09?style=for-the-badge&label=Last%20Github%20Commit)
 

code/boot/README.md

@@ -1,33 +1,29 @@
 # Boot Firmware for CHIBI PC-09
 
-This is the firmware for the CHIBI PC-09. In the future it will provide the
+TODO: Description of what the firmware does for the PC-09.
-CHIBI with initialization code, a UART driver, some self test features.
 
 ## Building the Firmware
 
-Building the firmware from source requires [LWTOOLS](http://www.lwtools.ca/) for
+You will need GNU `make`, and [`asm6809`](https://www.6809.org.uk/asm6809) to
-building S-Records of the ROM, and `mot2bin` from
+build the firmware. Obtaining a working copy of `asm6809` could be difficult if
-[F9DASM](https://github.com/Arakula/f9dasm) for building binary images. A GNU
+you aren't on Debian, Ubuntu, or Windows as instructions for building it are not
-Make makefile is provided for building on Linux.
+given on the `asm6809` website. Functional instructions for building from Git or
-
+tarball are given here:
-### Using the Makefile
-
-To generate an S-Record run:
-
-```sh
-make boot.s19
-```
-
-To generate a binary run:
 
 ```sh
+git clone https://www.6809.org.uk/git/asm6809.git
+cd asm6809
+./configure
 make
+sudo make install
 ```
 
-The makefile also can clean up after itself:
+From there all you should have to do to generate a `boot.bin` is:
 
 ```sh
-make clean
+git clone https://github.com/amberisvibin/chibi-pc09.git
+cd chibi-pc09/code/boot
+make
 ```
 
 ## Firmware Licensing

code/boot/makefile

@@ -9,7 +9,6 @@
 # ------------------------------------------------------------------------------
 
 TARGET  := boot
-TARGREC  := $(TARGET).s19
 TARGROM := $(TARGET).bin
 SRCDIR  := src/
 BUILDDIR := build/
@@ -23,7 +22,7 @@ INCS     := $(wildcard $(SRCDIR)*.inc)
 
 AS  := lwasm
 LD  := lwlink
-FIX := objcopy
+FIX := mot2bin
 
 ASFLAGS := -f obj
 LDFLAGS := -f srec -m map.txt -s linkscript
@@ -35,11 +34,11 @@ LDFLAGS := -f srec -m map.txt -s linkscript
 all: $(TARGROM)
 
 # Fix srec into flashable bin file
-$(TARGROM): $(TARGREC)
+$(TARGROM): $(TARGET).s19
-	$(FIX) -I srec -O binary $< $@
+	$(FIX) -out $@ $<
 
 # Link objects
-$(TARGREC): $(OBJS)
+$(TARGET).s19: $(OBJS)
 	$(LD) $(LDFLAGS) -o $@ $^
 
 # Assemble objects
@@ -47,6 +46,7 @@ $(OBJS): $(BUILDDIR)%.o : $(SRCDIR)%.s
 	-@mkdir -p $(BUILDDIR)
 	$(AS) $(ASFLAGS) -o $@ $<
 
+.IGNORE: clean
 clean:
 	@echo 'Cleaning up intermediary files...'
-	@rm -rv $(TARGROM) $(TARGREC) map.txt $(BUILDDIR)
+	@rm -rv $(TARGROM) $(TARGET).s19 map.txt $(BUILDDIR)

code/boot/src/hardware.inc

@@ -15,16 +15,6 @@ UART_BASE EQU $7F00 ; UART Base Address
 ROM_BASE  EQU $8000 ; ROM Base Address and Entry Point
 VECS_BASE EQU $FFF0 ; Vectors Base Address
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;
-;; Stack Base Address and Size Information
-;;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-STACK_BOTTOM EQU $0100 ; Bottom address of system stack
-STACK_DEPTH  EQU $FF   ; System stack's depth
-STACK_TOP    EQU STACK_BOTTOM+STACK_DEPTH ; Top address of system stack
-
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;
 ;; UART Registers and Flags

code/boot/src/reset.s

@@ -16,19 +16,6 @@
   EXPORT RESET
 
 RESET
-
-CLRSTACK
-  ; Initialize the system stack
-  lda #$00           ; Initialize A & X to zero out the stack
-  ldx #$0000
-NEXT@
-  sta STACK_BOTTOM,x ; Write a zero and progress to the next byte
-  leax 1,x
-  cmpx #STACK_DEPTH  ; See if we're at the top of the stack yet
-  blo NEXT@          ; Loop if we aren't at the end yet
-  lds STACK_TOP      ; Set S to top of newly cleared stack
-
-SERINIT
   ; 8n1 Serial Enable DLAB
   lda #UARTF_LCR_WLS | UARTF_LCR_DLAB
   sta UART_LCR
@@ -41,9 +28,8 @@ SERINIT
   lda #(UARTF_MCR_RTS) ; Enable Request-to-Send
   sta UART_MCR
   lda #'H               ; send 'H'
-  sta UART_THR
+  sta UART_BUFR
-
+WAIT@
-WAIT
   sync                 ; Wait for interrupts
   nop
-  bra WAIT
+  bra WAIT@

code/boot/src/serial.s

@@ -12,25 +12,9 @@
 
   SECTION SERIAL
 
-  EXPORT SETBAUD
   EXPORT OUTCHAR
   EXPORT OUTSTR
 
-; Initializes the UART.
-; @param d: new divisor
-SETBAUD
-  pshs a              ; Preserve A
-  lda UART_LCR        ; Set only the DLAB bit
-  ora #UARTF_LCR_DLAB
-  sta UART_LCR
-  puls a
-  sta UART_DLM        ; Store new divisor
-  stb UART_DLL
-  lda UART_LCR        ; Reset DLAB
-  anda #$FE
-  sta UART_LCR
-  rts
-
 ; Writes a char to the UART in non FIFO mode, preserves A.
 ; @param b: char to write
 OUTCHAR
@@ -39,7 +23,7 @@ NOTREADY@
   lda UART_LSR         ; if LSR.THRE == 1 then write
   anda UARTF_LSR_THRE
   bne NOTREADY@        ; Loop if UART not ready yet
-  stb UART_THR         ; Write char
+  stb UART_BUFR        ; Write char
   puls a               ; Restore A
   rts
 
@@ -55,7 +39,7 @@ NOTREADY@              ; Loop point for UART waiting
   lda UART_LSR         ; Wait for UART to be ready
   anda UARTF_LSR_THRE
   bne NOTREADY@
-  stb UART_THR         ; Actually do our write
+  stb UART_BUFR        ; Actually do our write
   bra OUTSTR           ; Reset for the next char
 END@                   ; Jump point for end of routine
   rts