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Author SHA1 Message Date
Raphaël Jacquot
735504d2b3 implement RESET instruction 2019-03-04 10:15:37 +01:00
Raphaël Jacquot
dd16719a42 recognize PC_READ command 2019-03-04 10:15:27 +01:00
Raphaël Jacquot
c20c893234 replace X with ? to make a difference 2019-03-04 10:15:11 +01:00
Raphaël Jacquot
8a631c28c2 fix missing bus state reset 2019-03-04 10:14:44 +01:00
Raphaël Jacquot
18a56d750b export main registers to debugger 
add C register
implement C=P n
add dumping C register
 2019-03-04 09:58:13 +01:00
Raphael Jacquot
7c313c3b5d make it faster yet 2019-03-04 08:56:26 +01:00
Raphael Jacquot
b2811e82eb too shlow now 
bus halt in simulation only
 2019-03-04 08:44:05 +01:00
Raphael Jacquot
12173e72c4 fix forgotten reset 
slow it down some
 2019-03-04 08:32:34 +01:00
Raphael Jacquot
39182feaf1 fix miscalculations and typo 2019-03-04 08:23:53 +01:00
Raphael Jacquot
5968e6f00e 1/32s is too fast ;-) 2019-03-04 08:16:27 +01:00
Raphaël Jacquot
e0eecde066 merge 2019-03-04 08:10:53 +01:00
Raphaël Jacquot
009f01f5d7 implement 8[45]x ST=[01] n 
implement GOVLNG
dump 2 lines of registers in debugger now
 2019-03-04 08:08:02 +01:00
Raphael Jacquot
8cbf9f59a2 make the blinkenlights pretty 2019-03-03 23:24:50 +01:00
Raphaël Jacquot
da3cce2c07 execute the first jump successfully, and start reading the next instruction 2019-03-03 22:38:56 +01:00
Raphaël Jacquot
a301036968 Merge branch 'master' of github.com:sxpert/hp-saturn 2019-03-03 20:49:10 +01:00
Raphaël Jacquot
631b7f9153 start implementing jump instructions 2019-03-03 20:48:56 +01:00
Raphaël Jacquot
d17a4eb533 cleanup 2019-03-03 20:48:48 +01:00
Raphael Jacquot
cfd7603e96 we have signal ! 2019-03-03 18:22:48 +01:00
Raphael Jacquot
c04c770cba successfully got the saturn to startup on the ECP5 \o/ 2019-03-03 17:29:30 +01:00
Raphael Jacquot
bc25d4a61a cleanup blinky test 2019-03-03 16:18:30 +01:00
Raphael Jacquot
42e49caca3 cleanup of top 2019-03-03 15:59:02 +01:00
Raphael Jacquot
e192444f51 added a chaser to test the board 2019-03-03 15:46:21 +01:00
Raphaël Jacquot
6dd38500a8 add a counter to slow things down 2019-03-03 15:19:07 +01:00
Raphael Jacquot
ca29b542c3 there, a working compile shell script 2019-03-03 14:16:58 +01:00
Raphael Jacquot
531e0cab02 update compile file 2019-03-03 14:00:10 +01:00
Raphaël Jacquot
28a81503eb store current PC for the currently decoding instruction 2019-03-03 13:34:00 +01:00
Raphaël Jacquot
b58be38b10 connect debugger to leds 2019-03-03 13:33:32 +01:00
Raphael Jacquot
a6d5491619 fix the compilation for proper use of clk_25mhz signal as clock 2019-03-03 13:03:36 +01:00
Raphael Jacquot
9cb1618acb fix the rom module for proper bram generation 2019-03-03 13:03:12 +01:00
Raphaël Jacquot
391e5b6e93 change address bits to 12 (4096*4) 2019-03-03 10:27:31 +01:00
Raphael Jacquot
ae17cd1361 cleanup the rom 2019-03-03 10:24:53 +01:00
Raphaël Jacquot
2cab45a6ff remove the reset on the rom access, doesn't work 2019-03-03 10:08:26 +01:00
Raphael Jacquot
7e4ab90369 merge a few wire and assigns... can't do it on port declarations though 2019-03-03 09:47:28 +01:00
Raphael Jacquot
61957fab3e fix misplaced ifdef 
discover you can directly set contents of a wire without requiring an assign
 2019-03-03 09:43:18 +01:00
Raphaël Jacquot
eeb5150159 add the beginnings of a PC and RSTK handler 
fix bad maths in the rom-gx-r module
wire in the PC in the debugger and the control unit
add an execute flag, to start execution of partially
decoded instructions that need reading data from the
instruction stream
 2019-03-03 09:33:42 +01:00
Raphaël Jacquot
6c371cf203 increase ROMBITS to fully utilize one memory block 2019-03-03 08:09:33 +01:00
Raphael Jacquot
8fb7ad0eac try async version of reading rom... inconclusive 2019-03-03 08:03:43 +01:00
Raphaël Jacquot
3347a9702d add display of the carry 2019-03-03 07:45:03 +01:00
Raphael Jacquot
ff04360005 fix missing declaration 
fix driver conflict
 2019-03-03 07:31:18 +01:00
Raphaël Jacquot
b3d72c1d3b add some more debugging functionnality 
segregate reading of the rom in it's own little world
 2019-03-03 07:25:22 +01:00
Raphaël Jacquot
006b663147 implement hex->ascii conversion with a table 2019-03-03 06:57:14 +01:00
Raphael Jacquot
182623e043 remove char counting aid 2019-03-02 22:48:34 +01:00
Raphael Jacquot
21ad359673 fix compiling 
fix the way the bus controller program worked, which generated evil
inferred latches
 2019-03-02 22:33:58 +01:00
Raphaël Jacquot
42e8a146ce start implementing some type of debugging functionnality 2019-03-02 21:45:38 +01:00
Raphaël Jacquot
2fcd9f7b23 decode our first instruction 
execute said instruction
start implementing the debugging engine to see what we are doing
 2019-03-02 19:40:31 +01:00
Raphaël Jacquot
c75b33a64a update readme 2019-03-02 17:06:23 +01:00
Raphael Jacquot
c5355b4a90 enough was done to start feeding the decoder 2019-03-02 15:52:56 +01:00
Raphael Jacquot
cd2b74dcc8 add some commenting 2019-03-02 15:01:00 +01:00
Raphael Jacquot
3cbd6ac5e1 we are now up to reading the first instruction nibbles 2019-03-02 14:38:01 +01:00
Raphael Jacquot
8ce2d2a993 implement more of the bus controller 2019-03-02 13:22:09 +01:00