RELEASE 1.4

TODO.txt

@@ -1,5 +1,9 @@
 HARDWARE:
 
+* Split device dependent VHDL code (e.g. TIL) from IDE/Toolchain dependent
+  files, so that we are prepared for porting QNICE to other FPGA architectures
+  and for being able to have a Xilinx ISE and a Xilinx Vivado version.
+
 * SD Cards: Writing.
 
 * SD Cards: Replace SPI access by native access and by doing so, achieve
@@ -144,3 +148,11 @@ VBCC TOOLCHAIN: MONITOR-LIB:
 
 * Add all meaningful monitor functions.
 
+
+DEMOS:
+
+* Basic Interpreter
+
+* Forth Interpreter
+
+* VGA Textmode games: Snake, Pac Man, 2048

monitor/qmon.asm

@@ -428,6 +428,8 @@ QMON$CD         SUB     256, SP                 ; memory: 255 characters + zero
                 MOVE    256, R9                 ; R9 = buffer size
                 RSUB    IO$GETS_S, 1            ; enter string
                 RSUB    IO$PUT_CRLF, 1          ; CR/LF
+                CMP     @R8, 0                  ; completely empty string?
+                RBRA    QMON$CD_E, Z            ; yes: exit
                 MOVE    R8, R11                 ; R11 = saved pointer to input string
                 RSUB    QMON$CHKORMNT, 1        ; get device handle in R8
                 CMP     R8, 0                   ; worked?
@@ -463,6 +465,8 @@ QMON$LOAD       MOVE    0xFFFF, R6              ; R6 = start address of loaded b
                 MOVE    256, R9                 ; R9 = buffer size
                 RSUB    IO$GETS_S, 1            ; enter string
                 RSUB    IO$PUT_CRLF, 1          ; CR/LF
+                CMP     @R8, 0                  ; completely empty string?
+                RBRA    QMON$LOAD_E, Z          ; yes: exit
                 MOVE    R8, R10                 ; R10 = file name
                 MOVE    R8, R12                 ; R12 = saved pointer to file name
                 RSUB    QMON$CHKORMNT, 1        ; get device handle in R8

pore/boot_message.asm

@@ -4,4 +4,4 @@ PORE$NEWLINE  .ASCII_W "\n\n"
 
 ; PORE$RESETMSG .ASCII_W "QNICE-FPGA V1.38f [BETA/WIP] by sy2002 in December 2016 (GIT #"
 
-PORE$RESETMSG .ASCII_W "QNICE-FPGA Version 1.4 by sy2002 in December 2016 (GIT COMMIT #429b0b3)\n"
+PORE$RESETMSG .ASCII_W "QNICE-FPGA Version 1.4 by sy2002 in December 2016 (GIT COMMIT #85c85a3)\n"

vhdl/env1_globals.vhd

@@ -11,7 +11,7 @@ package env1_globals is
 
 -- file name and file size (in lines) of the file that is converted to the ROM located at 0x0000
 constant ROM_FILE             : string    := "../monitor/monitor.rom";
-constant ROM_SIZE             : natural   := 6452;
+constant ROM_SIZE             : natural   := 6460;
 --constant ROM_FILE             : string    := "../demos/q-tris.rom";
 --constant ROM_SIZE             : natural   := 4544;