P2 Invaders 2.0 - Their back!
ozpropdev
Posts: 2,792
Hi All
Here's the new version of Invaders for the P2.
This time around the code design is quite a departure from the original P2-Hot version.
In this version the system uses a "sprite engine" instead of a video frame buffer.
The same also applies for the 2 * "text engines" that build the video lines on the fly.
The sprite/text engines take advantage of the "masked write" WMLONG instruction.
The video driver and sprite/text engines are all sync'd with the COGATN mechanism.
Sound is generated using a simple 4 bit resistor ladder fed by the new streamer hardware.
The "game engine" utilizes cog/lut and hub exec modes.
The cordic solver is used in some of the animation/effects code.
The code runs on all 3 test platforms that support VGA connection (P123-A7,P123-A9 and DE2-115 with add-on board).
Code only runs on P123-A9 FPGA board with 8 cogs now.
Hope you have as much fun playing the game and pulling the code apart as i did writing it.
oz
Update 17th April 2018: Latest version for 32b FPGA image
Here's the new version of Invaders for the P2.
This time around the code design is quite a departure from the original P2-Hot version.
In this version the system uses a "sprite engine" instead of a video frame buffer.
The same also applies for the 2 * "text engines" that build the video lines on the fly.
The sprite/text engines take advantage of the "masked write" WMLONG instruction.
The video driver and sprite/text engines are all sync'd with the COGATN mechanism.
Sound is generated using a simple 4 bit resistor ladder fed by the new streamer hardware.
The "game engine" utilizes cog/lut and hub exec modes.
The cordic solver is used in some of the animation/effects code.
The code runs on all 3 test platforms that support VGA connection (P123-A7,P123-A9 and DE2-115 with add-on board).
Code only runs on P123-A9 FPGA board with 8 cogs now.
Hope you have as much fun playing the game and pulling the code apart as i did writing it.
oz
Update 17th April 2018: Latest version for 32b FPGA image
1056 x 592 - 248K
Comments
How did it feel different to write from the P2-Hot version? Was it easier or harder? Did you feel you had more or less flexibility? Which one was more fun to work on? I'm wondering about the programming ergonomics.
How many cogs did you wind up using? Were you forced to under-utilize any cogs, or could you spread the workload evenly? How about compared to P2-Hot?
When I started on the P2-Hot version I only had a 1 cog Nano to develop on.
This forced me down the multi-tasking road and writing some tight code which takes longer and gets a bit messy.
This time around I wanted to try and make it simpler so in the end I used seven cogs.
I am still exposed to P2-Hot code as well as the latest P2 incarnation and find them both a joy to code.
Even though P2-Hot had 1 clock instructions I think the new P2 compensates nicely with lut execution, smartpins, new hub scheme and 16 cogs.
I personally don't find one harder/easier than the other, just a little different.
I am a big fan of both variants so it's hard to pick a favourite, I'd buy both.
I hope someday we can buy both.
IIRC the P2-Hot only had 128KB of hub ram. I would have loved to see P2-HOT silicon tho'. Perhaps just splitting the hub ram into 16KB blocks would have helped the hub power section. Certainly would be interesting to see the real power usage under normal operating conditions - not the contrived flat out operating conditions.
In the current P2, if we have all 16 cogs running hubexec, I expect to see something towards "hot" style power consumption. But the removal of quad cog ram/lut and quad threads per cog should save power.
And now OnSemi is offering low leakage transistors too. It all adds up
Very very cool.
Almost makes me wanna get a P2 setup to play with.
(Almost- because I'd probably never finish anything else I'm suppose to be doing... that fear will keep me away a bit longer!)
Dang android. I swear, I've gotten really good on mobile. Some days, can do all my work on a Note 5. (My 4 got mangled) That includes CAD!
Did it at the beach once, just because.
Most can be touch and voice input too. Some needs Bluetooth keyboard mouse. And it is possible to be productive with all that. (Hint: get a tween or 20 something to run through how they work. It's different.)
But automangle just isn't there. It's supposed to get good as I use it. Fail.
And the worst is when it makes the edits. I tend to glance when making input actions. And the latency is enough, I will see it, verify state of input matches my running intent, then glance away, and then it does it.
Sneaky.
I broke into a cold sweat when my monitor showed 640x480 input, but nothing but a black screen. But since I have been suspecting my monitor for a while, I finally dug out a recent vintage, 12 inch VGA LCD and as if by magic, my pictures match your pictures.
YES!!!
I really like the way you have segmented the code. It makes re-using and playing with various parts so much easier.
Thanks
p.s.
If anyone has a 32" recent make Vizio, give this a shot. Is it Vizio? or just my particular monitor?
How did you go with attempting to exercise most/all instructions?
Analysis shows I missed the mark by more than I thought.
Instruction usage analysis of file : P2 Invaders 2.0.41_v12.spin2 Total instructions available (V12) = 268 1 : ABS * 3 2 : ADD * 128 3 : ADDCT1 * 7 4 : ADDCT2 * 1 5 : ADDCT3 * 2 6 : ADDX * 2 7 : ALTD * 9 8 : ALTI * 4 9 : AND * 17 10 : ANDN * 1 11 : ANYB * 4 12 : CALL * 220 13 : CALLD * 3 14 : CLKSET * 1 15 : CLRB * 19 16 : CMP * 48 17 : CMPR * 1 18 : CMPS * 4 19 : CMPSUB * 1 20 : COGATN * 22 21 : COGID * 2 22 : COGINIT * 6 23 : DECOD * 2 24 : DIRH * 3 25 : DJNS * 6 26 : DJNZ * 27 27 : GETBYTE * 2 28 : GETCT * 7 29 : GETNIB * 2 30 : GETQX * 16 31 : GETQY * 4 32 : GETRND * 10 33 : GETWORD * 5 34 : INCMOD * 22 35 : JMP * 112 36 : JMPREL * 2 37 : LOC * 104 38 : MAX * 3 39 : MIN * 1 40 : MINS * 1 41 : MOV * 350 42 : MOVBYTS * 8 43 : MUL * 20 44 : MULPIX * 2 45 : NEG * 1 46 : NOTB * 1 47 : OR * 5 48 : OUTN * 2 49 : POLLATN * 2 50 : POLLCT1 * 4 51 : POLLCT2 * 1 52 : POLLXFI * 1 53 : POP * 5 54 : PUSH * 5 55 : QDIV * 10 56 : QFRAC * 2 57 : QMUL * 1 58 : QROTATE * 3 59 : QSQRT * 1 60 : RCL * 5 61 : RCR * 2 62 : RDBYTE * 7 63 : RDFAST * 2 64 : RDLONG * 58 65 : RDLUT * 17 66 : RDPIN * 2 67 : REP * 19 68 : RET * 133 69 : RFBYTE * 1 70 : ROL * 6 71 : ROLWORD * 4 72 : ROR * 2 73 : SETB * 15 74 : SETBC * 4 75 : SETBNZ * 1 76 : SETBYTS * 5 77 : SETBZ * 2 78 : SETCI * 1 79 : SETCMOD * 1 80 : SETCQ * 1 81 : SETCY * 1 82 : SETCZ * 6 83 : SETD * 3 84 : SETINT1 * 1 85 : SETINT3 * 1 86 : SETQ * 7 87 : SETQ2 * 6 88 : SETS * 1 89 : SETWORD * 3 90 : SETXFRQ * 2 91 : SHL * 19 92 : SHR * 15 93 : SUB * 34 94 : SUBR * 8 95 : TESTB * 42 96 : TESTIN * 4 97 : TJNZ * 3 98 : TJZ * 10 99 : TOPONE * 1 100 : WAITATN * 15 101 : WAITCT1 * 2 102 : WAITX * 2 103 : WFLONG * 2 104 : WMLONG * 3 105 : WRBYTE * 8 106 : WRFAST * 1 107 : WRLONG * 68 108 : WRLUT * 13 109 : WRPIN * 8 110 : WXPIN * 3 111 : WYPIN * 1 112 : XCONT * 4 113 : XINIT * 1 114 : XOR * 1 115 : XZERO * 2 -------------------------------------------------------------------------------- Instructions not used 1 CCCC 1010010 00I DDDDDDDDD SSSSSSSSS ADDPIX D,S/# 2 CCCC 0001010 CZI DDDDDDDDD SSSSSSSSS ADDS D,S/# {WC,WZ} 3 CCCC 0001011 CZI DDDDDDDDD SSSSSSSSS ADDSX D,S/# {WC,WZ} 4 CCCC 1101011 000 000100000 000100100 ALLOWI 5 CCCC 1001111 01I DDDDDDDDD SSSSSSSSS ALTR D,S/# 6 CCCC 1001111 11I DDDDDDDDD SSSSSSSSS ALTS D,S/# 7 CCCC 11111nn nnn nnnnnnnnn nnnnnnnnn AUGD #23bits 8 CCCC 11110nn nnn nnnnnnnnn nnnnnnnnn AUGS #23bits 9 CCCC 1010010 10I DDDDDDDDD SSSSSSSSS BLNPIX D,S/# 10 CCCC 1001101 00I DDDDDDDDD SSSSSSSSS * BMASK D,S/# 11 CCCC 0111011 CZI DDDDDDDDD SSSSSSSSS BOTONE D,S/# {WC,WZ} 12 CCCC 1101101 Rnn nnnnnnnnn nnnnnnnnn CALL #abs/#rel 13 CCCC 1101011 CZ0 DDDDDDDDD 000101110 CALLA D {WC,WZ} 14 CCCC 1101110 Rnn nnnnnnnnn nnnnnnnnn CALLA #abs/#rel 15 CCCC 1101011 CZ0 DDDDDDDDD 000101111 CALLB D {WC,WZ} 16 CCCC 1101111 Rnn nnnnnnnnn nnnnnnnnn CALLB #abs/#rel 17 CCCC 11100ww Rnn nnnnnnnnn nnnnnnnnn CALLD reg,#abs/#rel 18 CCCC 1011110 0LI DDDDDDDDD SSSSSSSSS * CALLPA D/#,S/# 19 CCCC 1011110 1LI DDDDDDDDD SSSSSSSSS * CALLPB D/#,S/# 20 CCCC 0010101 CZI DDDDDDDDD SSSSSSSSS CMPM D,S/# {WC,WZ} 21 CCCC 0010011 CZI DDDDDDDDD SSSSSSSSS CMPSX D,S/# {WC,WZ} 22 CCCC 0010001 CZI DDDDDDDDD SSSSSSSSS CMPX D,S/# {WC,WZ} 23 CCCC 1101011 00L DDDDDDDDD 000000011 COGSTOP D/# 24 CCCC 0111001 CZI DDDDDDDDD SSSSSSSSS DECMOD D,S/# {WC,WZ} 25 CCCC 1101011 CZL DDDDDDDDD 001000010 DIRC D/# {WC,WZ} 26 CCCC 1101011 CZL DDDDDDDDD 001000000 DIRL D/# {WC,WZ} 27 CCCC 1101011 CZL DDDDDDDDD 001000110 DIRN D/# {WC,WZ} 28 CCCC 1101011 CZL DDDDDDDDD 001000011 DIRNC D/# {WC,WZ} 29 CCCC 1101011 CZL DDDDDDDDD 001000101 DIRNZ D/# {WC,WZ} 30 CCCC 1101011 CZL DDDDDDDDD 001000100 DIRZ D/# {WC,WZ} 31 CCCC 1011011 10I DDDDDDDDD SSSSSSSSS DJS D,S/#rel9 32 CCCC 1011011 00I DDDDDDDDD SSSSSSSSS DJZ D,S/#rel9 33 CCCC 1100100 1LI DDDDDDDDD SSSSSSSSS FBLOCK D/#,S/# 34 CCCC 1101011 000 DDDDDDDDD 000110101 GETINT D 35 CCCC 1101011 000 DDDDDDDDD 000110100 GETPTR D 36 CCCC 1101011 000 DDDDDDDDD 000011110 GETXCOS D 37 CCCC 1101011 000 DDDDDDDDD 000011111 GETXSIN D 38 CCCC 1011010 11I DDDDDDDDD SSSSSSSSS IJNS D,S/#rel9 39 CCCC 1011010 01I DDDDDDDDD SSSSSSSSS IJNZ D,S/#rel9 40 CCCC 1011010 10I DDDDDDDDD SSSSSSSSS IJS D,S/#rel9 41 CCCC 1011010 00I DDDDDDDDD SSSSSSSSS IJZ D,S/#rel9 42 CCCC 0100000 CZI DDDDDDDDD SSSSSSSSS ISOB D,S/# {WC,WZ} 43 CCCC 1101100 Rnn nnnnnnnnn nnnnnnnnn JMP #abs/#rel 44 CCCC 1011101 1LI DDDDDDDDD SSSSSSSSS JNP D/#,S/#rel9 45 CCCC 1011101 0LI DDDDDDDDD SSSSSSSSS JP D/#,S/#rel9 46 CCCC 1101011 C0L DDDDDDDDD 000000110 LOCKCLR D/# {WC} 47 CCCC 1101011 CZ0 DDDDDDDDD 000000100 LOCKNEW D {WC,WZ} 48 CCCC 1101011 00L DDDDDDDDD 000000101 LOCKRET D/# 49 CCCC 1101011 C0L DDDDDDDDD 000000111 LOCKSET D/# {WC} 50 CCCC 0011011 CZI DDDDDDDDD SSSSSSSSS MAXS D,S/# {WC,WZ} 51 CCCC 1001011 01I DDDDDDDDD SSSSSSSSS MERGEB D,S/# 52 CCCC 1001011 11I DDDDDDDDD SSSSSSSSS MERGEW D,S/# 53 CCCC 1010010 11I DDDDDDDDD SSSSSSSSS MIXPIX D,S/# 54 CCCC 1010000 1ZI DDDDDDDDD SSSSSSSSS MULS D,S/# {WZ} 55 CCCC 0101100 CZI DDDDDDDDD SSSSSSSSS MUXC D,S/# {WC,WZ} 56 CCCC 0101101 CZI DDDDDDDDD SSSSSSSSS MUXNC D,S/# {WC,WZ} 57 CCCC 0101111 CZI DDDDDDDDD SSSSSSSSS MUXNZ D,S/# {WC,WZ} 58 CCCC 0101110 CZI DDDDDDDDD SSSSSSSSS MUXZ D,S/# {WC,WZ} 59 CCCC 0110100 CZI DDDDDDDDD SSSSSSSSS NEGC D,S/# {WC,WZ} 60 CCCC 0110101 CZI DDDDDDDDD SSSSSSSSS NEGNC D,S/# {WC,WZ} 61 CCCC 0110111 CZI DDDDDDDDD SSSSSSSSS NEGNZ D,S/# {WC,WZ} 62 CCCC 0110110 CZI DDDDDDDDD SSSSSSSSS NEGZ D,S/# {WC,WZ} 63 CCCC 0110001 CZI DDDDDDDDD SSSSSSSSS NOT D,S/# {WC,WZ} 64 CCCC 1101011 CZL DDDDDDDDD 001001010 OUTC D/# {WC,WZ} 65 CCCC 1101011 CZL DDDDDDDDD 001001001 OUTH D/# {WC,WZ} 66 CCCC 1101011 CZL DDDDDDDDD 001001000 OUTL D/# {WC,WZ} 67 CCCC 1101011 CZL DDDDDDDDD 001001011 OUTNC D/# {WC,WZ} 68 CCCC 1101011 CZL DDDDDDDDD 001001101 OUTNZ D/# {WC,WZ} 69 CCCC 1101011 CZL DDDDDDDDD 001001100 OUTZ D/# {WC,WZ} 70 CCCC 1101011 C00 000000011 000100100 POLLCT3 {WC} 71 CCCC 1101011 C00 000001001 000100100 POLLFBW {WC} 72 CCCC 1101011 C00 000000000 000100100 POLLINT {WC} 73 CCCC 1101011 C00 000001000 000100100 POLLPAT {WC} 74 CCCC 1101011 C00 000001111 000100100 POLLQMT {WC} 75 CCCC 1101011 C00 000000100 000100100 POLLSE1 {WC} 76 CCCC 1101011 C00 000000101 000100100 POLLSE2 {WC} 77 CCCC 1101011 C00 000000110 000100100 POLLSE3 {WC} 78 CCCC 1101011 C00 000000111 000100100 POLLSE4 {WC} 79 CCCC 1101011 C00 000001010 000100100 POLLXMT {WC} 80 CCCC 1101011 C00 000001101 000100100 POLLXRL {WC} 81 CCCC 1101011 C00 000001100 000100100 POLLXRO {WC} 82 CCCC 1101011 00L DDDDDDDDD 000001111 QEXP D/# 83 CCCC 1101011 00L DDDDDDDDD 000001110 QLOG D/# 84 CCCC 1101010 1LI DDDDDDDDD SSSSSSSSS QVECTOR D/#,S/# 85 CCCC 1010111 CZI DDDDDDDDD SSSSSSSSS RDWORD D,S/#/PTRx {WC,WZ} 86 CCCC 1101011 CZ0 000000000 000110010 RETA {WC,WZ} 87 CCCC 1101011 CZ0 000000000 000110011 RETB {WC,WZ} 88 CCCC 1001110 00I DDDDDDDDD SSSSSSSSS REV D,S/# 89 CCCC 1101011 CZ0 DDDDDDDDD 000010010 RFLONG D {WC,WZ} 90 CCCC 1101011 CZ0 DDDDDDDDD 000010001 RFWORD D {WC,WZ} 91 CCCC 1001100 11I DDDDDDDDD SSSSSSSSS RGBEXP D,S/# 92 CCCC 1001100 10I DDDDDDDDD SSSSSSSSS RGBSQZ D,S/# 93 CCCC 1001000 nnI DDDDDDDDD SSSSSSSSS ROLBYTE D,S/#,#n 94 CCCC 100010n nnI DDDDDDDDD SSSSSSSSS ROLNIB D,S/#,#n 95 CCCC 0000111 CZI DDDDDDDDD SSSSSSSSS SAL D,S/# {WC,WZ} 96 CCCC 0000110 CZI DDDDDDDDD SSSSSSSSS SAR D,S/# {WC,WZ} 97 CCCC 1010001 1ZI DDDDDDDDD SSSSSSSSS SCL D,S/# {WZ} 98 CCCC 1010001 0ZI DDDDDDDDD SSSSSSSSS SCLU D,S/# {WZ} 99 CCCC 0100101 CZI DDDDDDDDD SSSSSSSSS SETBNC D,S/# {WC,WZ} 100 CCCC 1101011 00L DDDDDDDDD 000110110 SETBRK D/# 101 CCCC 1000110 nnI DDDDDDDDD SSSSSSSSS SETBYTE D,S/#,#n 102 CCCC 1101011 00L DDDDDDDDD 000111011 SETCFRQ D/# 103 CCCC 1101011 00L DDDDDDDDD 000011100 SETDACS D/# 104 CCCC 1101011 00L DDDDDDDDD 000100110 SETINT2 D/# 105 CCCC 1101011 00L DDDDDDDDD 000110111 SETLUT D/# 106 CCCC 100000n nnI DDDDDDDDD SSSSSSSSS SETNIB D,S/#,#n 107 CCCC 1011111 0LI DDDDDDDDD SSSSSSSSS * SETPEQ D/#,S/# 108 CCCC 1101011 00L DDDDDDDDD 000111110 SETPIV D/# 109 CCCC 1101011 00L DDDDDDDDD 000111101 SETPIX D/# 110 CCCC 1011111 1LI DDDDDDDDD SSSSSSSSS * SETPNE D/#,S/# 111 CCCC 1001110 01I DDDDDDDDD SSSSSSSSS SETR D,S/# 112 CCCC 1101011 00L DDDDDDDDD 000100000 SETSE1 D/# 113 CCCC 1101011 00L DDDDDDDDD 000100001 SETSE2 D/# 114 CCCC 1101011 00L DDDDDDDDD 000100010 SETSE3 D/# 115 CCCC 1101011 00L DDDDDDDDD 000100011 SETSE4 D/# 116 CCCC 1001100 00I DDDDDDDDD SSSSSSSSS SEUSSF D,S/# 117 CCCC 1001100 01I DDDDDDDDD SSSSSSSSS SEUSSR D,S/# 118 CCCC 1001011 00I DDDDDDDDD SSSSSSSSS SPLITB D,S/# 119 CCCC 1001011 10I DDDDDDDDD SSSSSSSSS SPLITW D,S/# 120 CCCC 1101011 000 000100001 000100100 STALLI 121 CCCC 0001110 CZI DDDDDDDDD SSSSSSSSS SUBS D,S/# {WC,WZ} 122 CCCC 0001111 CZI DDDDDDDDD SSSSSSSSS SUBSX D,S/# {WC,WZ} 123 CCCC 0001101 CZI DDDDDDDDD SSSSSSSSS SUBX D,S/# {WC,WZ} 124 CCCC 0011100 CZI DDDDDDDDD SSSSSSSSS SUMC D,S/# {WC,WZ} 125 CCCC 0011101 CZI DDDDDDDDD SSSSSSSSS SUMNC D,S/# {WC,WZ} 126 CCCC 0011111 CZI DDDDDDDDD SSSSSSSSS SUMNZ D,S/# {WC,WZ} 127 CCCC 0011110 CZI DDDDDDDDD SSSSSSSSS SUMZ D,S/# {WC,WZ} 128 CCCC 0111101 CZI DDDDDDDDD SSSSSSSSS TEST D,S/# {WC,WZ} 129 CCCC 0111100 CZI DDDDDDDDD SSSSSSSSS TESTN D,S/# {WC,WZ} 130 CCCC 1101011 CZL DDDDDDDDD 001001111 TESTNIN D/# {WC,WZ} 131 CCCC 1011100 11I DDDDDDDDD SSSSSSSSS TJNS D,S/#rel9 132 CCCC 1011100 10I DDDDDDDDD SSSSSSSSS TJS D,S/#rel9 133 CCCC 1101011 000 000100010 000100100 TRGINT1 134 CCCC 1101011 000 000100011 000100100 TRGINT2 135 CCCC 1101011 000 000100100 000100100 TRGINT3 136 CCCC 1001101 01I DDDDDDDDD SSSSSSSSS * TRIML D,S/# 137 CCCC 1001101 10I DDDDDDDDD SSSSSSSSS * TRIMR D,S/# 138 CCCC 1101011 C00 000010010 000100100 WAITCT2 {WC} 139 CCCC 1101011 C00 000010011 000100100 WAITCT3 {WC} 140 CCCC 1101011 C00 000011001 000100100 WAITFBW {WC} 141 CCCC 1101011 C00 000010000 000100100 WAITINT {WC} 142 CCCC 1101011 C00 000011000 000100100 WAITPAT {WC} 143 CCCC 1101011 C00 000010100 000100100 WAITSE1 {WC} 144 CCCC 1101011 C00 000010101 000100100 WAITSE2 {WC} 145 CCCC 1101011 C00 000010110 000100100 WAITSE3 {WC} 146 CCCC 1101011 C00 000010111 000100100 WAITSE4 {WC} 147 CCCC 1101011 C00 000011011 000100100 WAITXFI {WC} 148 CCCC 1101011 C00 000011010 000100100 WAITXMT {WC} 149 CCCC 1101011 C00 000011101 000100100 WAITXRL {WC} 150 CCCC 1101011 C00 000011100 000100100 WAITXRO {WC} 151 CCCC 1101011 00L DDDDDDDDD 000010011 WFBYTE D/# 152 CCCC 1101011 00L DDDDDDDDD 000010100 WFWORD D/# 153 CCCC 1100010 1LI DDDDDDDDD SSSSSSSSS WRWORD D/#,S/#/PTRxWith a bit more "free time" I could weave more of these into the code but i'm back onto smartpin stuff now and preparing for analog testing.
It looks like you used SETBYTS five times. I just got rid of that to allow ALTB for addressing multi-long bit fields.
I'm thinking maybe TRIML should be gotten rid of, TRIMR changed to BTRIM, and SETBYTS put back in. What do you think? SETBYTS does save an instruction (MOV reg,value + MOVBYTS reg,#%00_00_00_00), but in the case where you just want to copy the bottom byte to the others, MOVBYTS is sufficient. What do you think?
Keeping TRIML also seems more useful to keep at the expense of losing SETBYTS.
Ok. Thanks.
BTW Only runs on P123-A9 boards now.
Sorry code is a bit messy. Lots of changes along the way from V13 image.
Is the new code smaller and faster ? ( V13 -> V32b ?)
Coupled via a cap to drive an audio amp.
Not very "Hi-Fi" but enough to add to the overall game atmosphere.
Haven't got component values handy at the moment.
The bulk of the changes have been related to changes to instruction operation.
IIRC here's some of the things that changed along the way that broke my code temporarily.
The WMLONG instruction transparent value changed from FF to 00.
The CT overflow check changed which affected my time delay operation.
The Z flag changed to a inverted state.
Some instructions were deleted from the instructions set and therefore needed substation.
I'm sure there were more than that, but that's all I can remember at the moment.
The circuit changed from the P123-A7 board which was easier for Chip to map the second DAC.
It would have been nice to get to the second DAC.
When we get our silicon P2's we can have sound on any pin we like.