Search found 130 matches

by tcat
Wed Oct 16, 2019 2:20 pm
Forum: 680x0
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 242

Re: DIY FPU Dev Kit - SFP004

Hi, I have found two typos in the `MACR881A.S' fpu macro code, changes as per diff below. I have not tested them all yet. $ diff MACR881A.S save/MACR881A.S 685c685 < BNE\! \2 ;BRANCH IF CONDITION TRUE! --- > BNE\! \1 ;BRANCH IF CONDITION TRUE! 771c771 < MOVEQ #\1+\2+\3+\4+\5+\6+\7+\8-1,D3 --- > MOVE...
by tcat
Wed Oct 16, 2019 10:54 am
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 SFP004 support
Replies: 7
Views: 182

Re: MEGAMAX MODULA-2 SFP004 support

Hi, I was curious what benefit can FPU offer over CPU. I have run this simple test. MODULE FpuTest; (*$E MOS*) (*$F+*) FROM InOut IMPORT WriteReal, WriteCard, WriteLn; FROM MOSGlobals IMPORT Time; FROM Clock IMPORT CurrentTime; FROM MathLib0 IMPORT pi,sin,cos,sincos; PROCEDURE Secs(): CARDINAL; VAR ...
by tcat
Wed Oct 16, 2019 7:25 am
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 SFP004 support
Replies: 7
Views: 182

Re: MEGAMAX MODULA-2 SFP004 support

Hi, With $F+ in MOSConfig I can now link the executable, but I do not seem able to write any real output with InOut.WriteReal(), I am getting an exception. EDIT it now works, as InOut depends on Convert, that has to be also FPU aware $F+. These modules are a must to provide in linking for FPU math a...
by tcat
Tue Oct 15, 2019 8:42 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 SFP004 support
Replies: 7
Views: 182

Re: MEGAMAX MODULA-2 SFP004 support

Hi czietz, Yes you are right, now looking into the zipped archive I can see, 8038 1994-01-21 20:38 MM2_DEV/CA/TT_FPU/RUNTIME.IMP 552 1994-01-21 20:38 MM2_DEV/CA/TT_FPU/RANDOMGE.IMP 754 1994-01-21 20:38 MM2_DEV/CA/TT_FPU/MOSCONFI.IMP 1100 1994-01-21 20:38 MM2_DEV/CA/TT_FPU/MATHLIB0.IMP 385 1992-02-05...
by tcat
Tue Oct 15, 2019 8:25 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 SFP004 support
Replies: 7
Views: 182

Re: MEGAMAX MODULA-2 SFP004 support

Hi czietz,

Thanks for taking your interest, in my `ST_FPU' folder I can only see,
MATHLIB0 IMP
RANDOMGE IMP
RUNTIME IMP

No other modules, also searching for MOSCONFI.IMP does not find the $F+ specific one here.
And there is, MOSCONFI.M source module with $F- option only.

Tomas
by tcat
Tue Oct 15, 2019 7:08 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 SFP004 support
Replies: 7
Views: 182

MEGAMAX MODULA-2 SFP004 support

Hi, I am testing FPU support in MM2. Reading manual gives F-directive as an `FPU turn on option'. I can compile a sample test module, see below. I cannot however link the executable. MODULE FpuTest; (*$F+ turns FPU ON*) FROM InOut IMPORT WriteReal, WriteLn; FROM MathLib0 IMPORT pi,sin,cos,sincos; PR...
by tcat
Thu Oct 03, 2019 3:59 pm
Forum: 680x0
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 242

Re: DIY FPU Dev Kit - SFP004

Hi, Ad [a], I have recoded inline macros based on AN947, it works with ATARI `MadMac' assembler. Will also test with `GFA-Assembler'. Here it is attached in zip, the source is tabulated to take up less space on disk. MACR881A.zip I have coded a simple test, will add full source after tidying it up a...
by tcat
Thu Oct 03, 2019 3:06 pm
Forum: 680x0
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 242

DIY FPU Dev Kit - SFP004

Hi, I am now testing FPU daugther board (http://www.atari-forum.com/viewtopic.php?f=15&t=33042) on STFM machine, with some efforts to provide `FPU Dev Kit', sort of. For your interest, I shall gladly share here, possibly to collect some feedback in return. This what I intend to get done: [a] Inl...
by tcat
Thu Oct 03, 2019 3:05 pm
Forum: Hardware
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 310

Re: DIY FPU Dev Kit - SFP004

Hi,

I will move the post to `Coding' section ...

Tomas
by tcat
Thu Oct 03, 2019 3:04 pm
Forum: Hardware
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 310

Re: DIY FPU Dev Kit - SFP004

Hi,

I will move the post to S/W section ...

Tomas
by tcat
Sun Sep 29, 2019 5:14 pm
Forum: Hardware
Topic: DIY FPU Dev Kit - SFP004
Replies: 2
Views: 310

DIY FPU Dev Kit - SFP004

Hi, I am now testing FPU daugther board on STFM machine, with some efforts to provide `FPU Dev Kit', sort of. For your interest, I shall gladly share here, possibly to collect some feedback in return. This what I intend to get done: [a] Inline assembler macros - based on Motorola AN947 [b] F-line em...
by tcat
Sat Sep 21, 2019 7:12 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi Otto,

Cookies in a jar, I only heard of them.
Is it a piece of h/w or s/w, how can I support them on my TOS 1.04 (raibow)?

Many thanks
Tomas
by tcat
Fri Sep 20, 2019 10:03 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi, As my soldering is not very neat, I am no way sure I had it functional. I run this simple test that was coded by a German ATARI branch years ago. Running FPU math test https://qlforum.co.uk/download/file.php?id=2487&mode=view [cannot add 190K jpeg] This may be an indication, it hopefully wor...
by tcat
Thu Sep 19, 2019 11:41 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi, I have only a simple `pistol' soldering iron, and I am not very skilfull with it. This is what I have , ICs populated in the sockets, VCC/GND sourced around PSU connector. GEM-BENCH reports some 1400% on FPU math test, while SYSINFO reports NO-COPROCESSOR fitted. What does it actually mean? Many...
by tcat
Mon Sep 09, 2019 9:29 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi, I dare to share my PCB design, I have routed using `KiCad'. There is a capacitor close to VCC of each chip. Power comes through P2 connector, connector P1 should interface to CPU. sfp004-pcb.png Proper design with ground filled areas, so far beyond my capabilities, something I need to learn yet....
by tcat
Fri Aug 16, 2019 9:07 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi,

I am now looking for motorola application note `AN947', the copy I have is missing appendices B and C.

Where to get the full document?

EDIT
Just found A,B,C appendices in the form of source text.

Many thanks
Tomas
by tcat
Fri Aug 02, 2019 6:50 pm
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi Steve, An interesting idea, need to study signals provided by ROM port (in ATARI reference book). I have made this eschema. ROM port might be a good option, but so far I thought to hook to CPU signals inside the machine. A few questions coming to my mind. [a] where to source +5V and GND, inside S...
by tcat
Fri Aug 02, 2019 10:23 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi,

While working on eschema, I spoted that AS signal in PLCC pinout is not inverted, while in PGA pinout has /AS inverted.
As I have PLCC package I need to know, is this a printing mistake or a fact????

Many thanks in advance
Tomas
by tcat
Wed Jul 31, 2019 2:27 pm
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi Greenious,

Thank you, here is the component symbol, I created in `KiCad', clockwise rotatated, and some pins slashed. When tied to PLCC68 `socket' footprint, then I hope Pin1 FPU will match Socket Pin1, Pin2 - Pin2, ..., 68 - 68.

mc6881-symbol.png

PLCC68-socket.png


Many thanks
Tomas
by tcat
Tue Jul 30, 2019 10:31 am
Forum: Hardware
Topic: DIY Fpu Unit for STFM
Replies: 35
Views: 5685

Re: DIY Fpu Unit for STFM - possible?

Hi, Reviving the topic, after getting all the components. 74HCxx in DIL, and MC68881 in PLCC. EDIT Trying to make a simple PCB design with KiCad tool... I have just found 68PLCC socket footpprint in the KiCad lib. Cannot not find the FPU symbol file, though. So I am wondering, how does MC68881 pinou...
by tcat
Sun Sep 02, 2018 2:59 pm
Forum: Hardware
Topic: SF314 models
Replies: 4
Views: 900

Re: SF314 models

Hi,
Thank you, encouradged by your replies, here is the next one. I learnt that drives are rubber belt driven. Do these belts vary from model to model? Same belt used for internal drives, and external models. Do they differ for ones with short and wide eject buttons?
Many thanks
Tomas
by tcat
Mon Aug 27, 2018 7:15 pm
Forum: Hardware
Topic: SF314 models
Replies: 4
Views: 900

SF314 models

Hi, Can anyone please advice on external SF314 floppy models? By looking at some pictures on the web, I can only recongnise two variants, with [1] `small eject button' , and [2] `large eject button'. My `STfm' machine has an internal drive capable of standard 720K up to 820K format (i.e. 10 sectors ...
by tcat
Fri Aug 24, 2018 3:18 pm
Forum: For sale / Wanted
Topic: Wanted: SF314 + cables + PSU
Replies: 2
Views: 956

Re: Wanted: SF314 + cables + PSU

mpattonm wrote:I think I have got one in the drawer.

Hi, thank you, PM sent.
T.
by tcat
Fri Aug 24, 2018 2:22 pm
Forum: For sale / Wanted
Topic: Wanted: SF314 + cables + PSU
Replies: 2
Views: 956

Wanted: SF314 + cables + PSU

Hi,
Looking for ATARI ST external DS floppy drive.
Many thanks
Tomas
by tcat
Tue Mar 13, 2018 3:16 pm
Forum: Hardware
Topic: MC68000 in STFM - package
Replies: 3
Views: 999

Re: MC68000 in STFM - package

Hi,

My board is this, with less room above CPU,


[a] aprox. mm's above the CPU?
[b] CPU package, DIL64, 2,54mm pin span, other?

P.S. sorry for being persistent

Many thanks
Tomas

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