e5frog

2021-05-24T16:00:34Z

Cool.

Always interesting to see what experienced programmers come up with.

May 15

2 hours ago, jgkspsx said:

Does anybody know who owns the rights to the Channel F and its games? Is it still Zircon (https://www.zircon.com)? The Evercade folks expressed interest in releasing a Channel F compilation for the Evercade, and that would be amazing!

I asked Zircon once, wasn't able to squeeze a reply out of them.
Considering the Multi-Cart I decided not to ask again, would be quite crappy if they got involved claiming rights.

Great for Evercade if they get/pay for permission, probably bad for everyone else.

May 15

2 hours ago, atari2601 said:

@e5frog do i just need to write that to a .asm file and compile it?

im getting the error Fatal assembly error: Source is not resolvable.

If I copy your code and save it as a text-file with suffix .asm - it works just fine.
So I don't know what you're doing differently.

The suffix doesn't matter at all, you can use .xxx as suffix or none at all, you type what file dasm is going to compile.
Using .asm is just to make it easier for you to know what's in the file.

May 15

No need to involve sleiszatrio, the code is standalone, no need for any other code.
You use dasm.exe to compile it from command prompt:
dasm codefilename.asm -f3 -oFILENAME.bin

Your sample data sounds like some sort of thump or maybe like a puff when a steam engine is about to start.

Try this:

; The format is 0
; High value is 140
; Low value is 110

    .byte $FF,$03,$02,$1D,$B5,$02,$02,$02,$02,$02,$2A,$18,$02,$03,$11,$2A
    .byte $6F,$65,$59,$76,$4E,$3F,$37,$43,$36,$01,$32,$42,$31,$3F,$52,$43
    .byte $2A,$44,$0C,$0B,$0F,$17,$45,$3B,$2D,$3D,$3D,$0D,$2F,$02,$0E,$2D
    .byte $39,$3E,$28,$0E,$0B,$08,$30,$3C,$2E,$39,$38,$13,$09,$0A,$2D,$39
    .byte $2D,$3C,$39,$1B,$04,$01,$03,$03,$34,$39,$29,$3D,$2B,$33,$3A,$37
    .byte $2B,$3D,$2D,$32,$42,$02,$03,$2D,$25,$44,$2B,$25,$56,$0C,$09,$92
    .byte $0B,$0B,$A9,$44,$0C,$44,$5B,$07,$4D,$5B,$0C,$2F,$58,$0D,$5E,$47
    .byte $08,$0B,$0C,$2B,$49,$08,$0D,$0C,$0C,$02,$1B,$0E,$16,$01,$03,$02
    .byte $0F,$0F,$02,$35,$0A,$0C,$09,$2A,$48,$10,$0B,$0A,$25,$10,$1A,$02
    .byte $10,$44,$15,$2F,$39,$25,$2B,$23,$2C,$84,$32,$14,$42,$16,$02,$02
    .byte $3A,$89,$6D,$2A,$56,$02,$0D,$4C,$32,$21,$38,$2B,$6B,$52,$4A,$30
    .byte $39,$24,$33,$8C,$3B,$3B,$FF,$69,$C0,$8D,$AA,$A1,$DE,$93,$FF,$5B
    .byte $CB,$80,$2C,$2E,$8D,$3D,$2C,$1F,$02,$0A,$02,$03,$02,$02,$30,$02
    .byte $06,$18,$02,$0F,$02,$05,$02,$03,$02,$02,$03,$02,$2C,$02,$03,$01
    .byte $0B,$02,$02,$02,$03,$02,$02,$02,$02,$02,$02,$02,$03,$04,$02,$02
    .byte $05,$02,$02,$03,$02,$02,$02,$0B,$02,$0E,$02,$03,$01,$0C,$02,$06
    .byte $03,$03,$01,$03,$02,$06,$02,$02,$02,$06,$02,$03,$1A,$02,$03,$02
    .byte $02,$15,$03,$02,$02,$02,$4B,$2B,$02,$06,$02,$0B,$02,$24,$3D,$01
    .byte $03,$02,$02,$0B,$01,$2B,$0B,$01,$03,$02,$49,$45,$39,$36,$37,$02
    .byte $02,$02,$03,$01,$03,$02,$02,$02,$3B,$02,$02,$4B,$2A,$2E,$3E,$31
    .byte $39,$30,$37,$41,$3C,$33,$33,$28,$32,$3A,$8B,$78,$AB,$39,$36,$30
    .byte $3C,$2D,$2F,$3F,$3B,$2B,$9D,$53,$2F,$2D,$3B,$26,$45,$19,$02,$02
    .byte $3D,$48,$3B,$2D,$39,$2F,$32,$22,$02,$01,$09,$09,$2F,$41,$35,$30
    .byte $3B,$02,$02,$2E,$2D,$01,$03,$02,$02,$03,$01,$29,$02,$02,$02,$02
    .byte $03,$01,$2B,$01,$03,$01,$03,$02,$02,$3A,$3B,$2D,$3B,$03,$01,$3A
    .byte $33,$34,$02,$02,$02,$02,$4C,$46,$20,$4C,$30,$22,$43,$32,$3F,$4A
    .byte $28,$32,$3E,$28,$43,$3A,$64,$66,$2F,$1E,$87,$32,$03,$02,$85,$41
    .byte $36,$30,$A4,$26,$3D,$2F,$2D,$94,$BE,$A4,$47,$1D,$02,$2E,$2A,$03
    .byte $12,$02,$25,$02,$15,$02,$03,$02,$0B,$01,$04,$02,$09,$02,$0F,$02
    .byte $0A,$02,$03,$02,$03,$02,$0B,$02,$03,$02,$02,$02,$03,$01,$03,$02
    .byte $03,$02,$02,$02,$06,$03,$06,$15,$03,$04,$02,$03,$02,$04,$02,$03
    .byte $02,$03,$02,$0A,$02,$04,$02,$03,$02,$04,$02,$0B,$02,$08,$02,$03
    .byte $02,$03,$02,$03,$02,$07,$02,$02,$02,$03,$02,$08,$02,$07,$02,$02
    .byte $03,$03,$02,$04,$02,$04,$02,$02,$03,$02,$03,$03,$02,$03,$04,$06
    .byte $04,$04,$03,$02,$03,$02,$03,$02,$03,$02,$02,$03,$07,$02,$02,$02
    .byte $03,$03,$08,$02,$07,$02,$03,$02,$03,$02,$05,$02,$09,$03,$03,$02
    .byte $03,$03,$02,$03,$03,$03,$03,$02,$03,$03,$03,$03,$09,$02,$08,$03
    .byte $03,$02,$02,$02,$06,$03,$09,$03,$03,$03,$06,$02,$02,$02,$03,$02
    .byte $02,$03,$03,$02,$02,$02,$02,$01,$03,$02,$03,$02,$03,$03,$02,$06
    .byte $02,$02,$03,$03,$02,$03,$03,$02,$03,$03,$0A,$02,$03,$03,$05,$02
    .byte $03,$03,$02,$03,$03,$02,$03,$03,$04,$03,$02,$03,$03,$02,$03,$03
    .byte $03,$03,$03,$02,$03,$04,$03,$03,$02,$02,$02,$02,$03,$02,$03,$05
    .byte $02,$03,$02,$03,$03,$03,$04,$02,$03,$02,$02,$03,$03,$03,$04,$02
    .byte $02,$03,$03,$04,$02,$03,$02,$03,$03,$09,$03,$02,$03,$02,$02,$07
    .byte $03,$05,$02,$06,$03,$02,$03,$02,$01,$02,$03,$02,$03,$02,$03,$02
    .byte $03,$03,$05,$06,$02,$02,$02,$03,$02,$02,$02,$03,$04,$06,$03,$03
    .byte $02,$02,$03,$02,$03,$02,$02,$06,$03,$03,$0F,$03,$03,$01,$04,$02
    .byte $16,$02,$03,$02,$04,$02,$03,$02,$03,$02,$02,$03,$03,$03,$02,$03
    .byte $01,$02,$04,$04,$03,$02,$03,$02,$03,$02,$02,$02,$03,$02,$02,$03
    .byte $04,$03,$03,$02,$02,$02,$03,$02,$03,$02,$02,$02,$02,$03,$04,$02
    .byte $02,$03,$03,$03,$02,$02,$03,$03,$02,$02,$02,$03,$02,$02,$03,$03
    .byte $06,$05,$03,$02,$03,$02,$0A,$03,$03,$02,$03,$02,$02,$02,$02,$03
    .byte $03,$03,$02,$03,$03,$02,$02,$02,$03,$02,$02,$02,$03,$02,$03,$02
    .byte $03,$06,$02,$03,$02,$02,$03,$02,$02,$05,$03,$03,$05,$05,$03,$02
    .byte $02,$03,$02,$03,$02,$02,$04,$03,$03,$05,$02,$03,$02,$03,$03,$02
    .byte $03,$02,$02,$03,$02,$03,$02,$02,$01,$02,$03,$03,$02,$02,$02,$03
    .byte $02,$02,$02,$03,$02,$02,$02,$04,$02,$03,$03,$03,$03,$03,$02,$04
    .byte $03,$03,$02,$02,$03,$03,$05,$03,$02,$02,$02,$02,$02,$02,$03,$02
    .byte $02,$03,$04,$06,$03,$03,$03,$05,$02,$02,$05,$03,$07,$02,$07,$02
    .byte $03,$02,$03,$02,$06,$01,$03,$02,$06,$02,$03,$02,$03,$03,$03,$02
    .byte $02,$02,$02,$02,$03,$02,$03,$02,$03,$02,$03,$02,$03,$02,$03,$02
    .byte $0A,$02,$07,$02,$0F,$03,$0B,$02,$03,$02,$02,$02,$03,$05,$02,$03
    .byte $02,$03,$02,$03,$02,$02,$02,$03,$02,$03,$03,$02,$02,$03,$02,$03
    .byte $03,$03,$03,$06,$02,$02,$03,$02,$02,$07,$03,$03,$02,$03,$02,$06
    .byte $03,$09,$02,$04,$02,$06,$02,$02,$03,$03,$05,$03,$03,$02,$02,$03
    .byte $04,$07,$03,$03,$02,$02,$03,$04,$05,$03,$03,$02,$03,$03,$03,$03
    .byte $06,$05,$07,$03,$23,$02,$02,$03,$02,$02,$03,$02,$03,$02,$02,$04
    .byte $03,$03,$02,$02,$03,$05,$05,$03,$03,$03,$03,$03,$02,$03,$04,$02
    .byte $03,$02,$03,$03,$04,$02,$02,$03,$03,$03,$03,$03,$05,$02,$03,$02
    .byte $02,$02,$02,$03,$02,$02,$02,$03,$02,$02,$03,$03,$03,$02,$02,$03
    .byte $04,$07,$05,$03,$03,$03,$02,$02,$03,$03,$02,$04,$03,$02,$03,$02
    .byte $02,$03,$05,$03,$05,$02,$03,$02,$04,$03,$07,$02,$05,$03,$02,$02
    .byte $03,$03,$04,$02,$03,$02,$03,$03,$04,$03,$02,$03,$03,$02,$02,$02
    .byte $05,$03,$03,$03,$03,$03,$02,$03,$03,$02,$02,$03,$0A,$03,$03,$03
    .byte $03,$03,$03,$01,$06,$02,$02,$03,$02,$03,$02,$02,$03,$02,$02,$02
    .byte $02,$03,$02,$03,$02,$05,$02,$11,$02,$03,$07,$03,$03,$02,$02,$02
    .byte $02,$03,$02,$06,$02,$02,$03,$02,$03,$02,$02,$03,$02,$02,$02,$03
    .byte $06,$03,$06,$05,$03,$04,$02,$02,$03,$03,$04,$03,$02,$02,$03,$02
    .byte $0A,$02,$03,$02,$03,$03,$04,$02,$04,$03,$07,$02,$03,$03,$03,$02
    .byte $04,$03,$03,$02,$03,$03,$02,$03,$02,$03,$02,$05,$03,$02,$03,$03
    .byte $03,$02,$02,$02,$03,$05,$02,$02,$03,$03,$02,$02,$05,$03,$03,$02
    .byte $02,$03,$03,$06,$02,$02,$02,$03,$03,$06,$06,$02,$03,$02,$02,$03
    .byte $02,$03,$02,$02,$03,$02,$03,$02,$04,$03,$02,$03,$02,$02,$03,$02
    .byte $02,$02,$03,$02,$02,$02,$03,$03,$02,$01,$02,$02,$03,$03,$05,$05
    .byte $04,$05,$05,$03,$06,$02,$03,$01,$03,$03,$09,$03,$02,$02,$02,$03
    .byte $05,$03,$02,$02,$02,$03,$02,$02,$03,$02,$02,$02,$03,$02,$02,$02
    .byte $03,$04,$04,$06,$04,$06,$05,$04,$06,$04,$03,$03,$02,$03,$04,$03
    .byte $04,$07,$04,$05,$04,$05,$04,$04,$02,$02,$03,$03,$05,$03,$07,$04
    .byte $05,$04,$04,$03,$02,$02,$03,$02,$03,$01,$04,$05,$03,$03,$07,$03
    .byte $05,$02,$02,$02,$04,$05,$06,$03,$06,$06,$03,$03,$06,$06,$03,$05
    .byte $04,$05,$03,$02,$02,$03,$03,$05,$07,$03,$05,$06,$04,$03,$08,$02
    .byte $03,$02,$02,$02,$03,$05,$04,$08,$03,$04,$03,$01,$02,$03,$02,$02
    .byte $03,$03,$02,$01,$03,$03,$06,$03,$05,$03,$05,$02,$02,$03,$02,$03
    .byte $02,$02,$07,$02,$03,$02,$02,$02,$03,$02,$03,$02,$02,$03,$01,$03
    .byte $02,$06,$06,$02,$06,$03,$09,$02,$05,$04,$06,$03,$06,$02,$02,$02
    .byte $03,$02,$02,$02,$03,$04,$05,$05,$04,$06,$03,$05,$06,$03,$06,$06
    .byte $03,$06,$06,$03,$03,$04,$07,$02,$02,$02,$04,$08,$03,$03,$05,$05
    .byte $06,$03,$07,$02,$03,$02,$02,$03,$03,$02,$02,$02,$03,$02,$02,$03
    .byte $06,$02,$02,$03,$03,$04,$03,$02,$03,$03,$03,$02,$02,$03,$03,$03
    .byte $02,$03,$03,$03,$02,$02,$03,$02,$0A,$03,$03,$07,$05,$02,$03,$02
    .byte $03,$02,$03,$03,$12,$02,$03,$02,$04,$02,$02,$03,$03,$02,$04,$03
    .byte $0B,$02,$02,$03,$1B,$02,$1B,$02,$03,$02,$03,$02,$05,$03,$07,$03
    .byte $67

May 15

Try it, I think it'll work.
I recall having to play around with the sample before it sounding the way it was supposed to.

May 15

That would be the second part of the text marked as code.
Save your data with filename "tetris.smp.inc" and use this code (which was the first part):
... or change the name, or paste your code in there instead of the "include" statement.

	processor f8
	org	$800

;------------;
; BIOS Calls ;
;------------;
clrscrn	= 	$00d0		; uses r31
delay		= 	$008f		; parameter in r5, uses r6
pushk		=	$0107		; uses r7, allows more subroutine stack space
popk		=	$011e		; uses r7 

game_size	=	32


CartridgeStart:
	.byte $55, $FB

	clr
	outs	0
	outs	1
	outs	4
;	ins	5
;	ni	%11000000			; Keep audio bits as is (no click)
	outs	5

CartridgeEntry: 

	dci	colordata
	lm
	xdc					; Store data counter for color in DC1

clearagain:
	lr	3, A
	pi	clrscrn



	dci	sample_buffer	; set data pointer to buffer
	clr
	com
	lr	0, A			;output_state = 0

outer_loop:
	clr				; 1  cycle
	am				; 2.5 cycles
	bz	end_sample
	lr	1, A			; 1  cycle		Sample counter stores data


	lr	A, 0			; 1  cycle		Fetch output state
	com				; 1  cycle		Invert output state
;	ni	%11000000		; 2.5 cycles	Only  keep the two sound bits
	lr	0, A			; 1  cycle		Store for next data invert

	outs	5			; 4 cycles		Put output state on port


	lr	A, 1			; 1c
	outs	1			; 2c	Color
	outs	4			; 4c	Column
	li	%11100001		; Set top two bits to 1
	ns	0			; And with r0 to set any 0 in top two
	outs	5			; 4c	Row
	lis	6			; 1c
	sl	4			; 1c
	outs	0			; 2c
	sl	1			; 1c
	outs	0			; 2c


inner_loop:
;	nop				; 1 cycle
;	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle


	ds	1			; 1.5 cycles	Decrease sample counter
	bnz	inner_loop		; 3.5 cycles branch, 3 cycles no branch
	br	outer_loop		; 3.5 cycles


end_sample:
	li	%00000000
	outs	5


	xdc				; back to color 
	clr
	am				; Add ram data to set flags
	xdc				; Change back
	bnz	clearagain		; Restart if not 0
	br	CartridgeEntry	; Start over

colordata:
	.byte $d6			; grey
	.byte $c0			; green
	.byte $21			; b/w
	.byte $93			; blue
	.byte 0
	.byte 0


;	jmp	CartridgeEntry
	
sample_buffer:
	include "tetris.smp.inc"
	.byte 0



;===========================================================================
; Signature 
;===========================================================================


	; signature
	org [$800 + [game_size * $400] -$10]

;signature:
	.byte "- e5frog - 2020 "

May 15

Only the first part is the actual used code, the other is an explanation how playing pwm is played in general.

If you put your data in a file called "tetris.smp.inc" you'd be able to run it right away.

May 11

Sample data is output with this code:

	processor f8
	org	$800

;------------;
; BIOS Calls ;
;------------;
clrscrn	= 	$00d0		; uses r31
delay		= 	$008f		; parameter in r5, uses r6
pushk		=	$0107		; uses r7, allows more subroutine stack space
popk		=	$011e		; uses r7 

game_size	=	32


CartridgeStart:
	.byte $55, $FB

	clr
	outs	0
	outs	1
	outs	4
;	ins	5
;	ni	%11000000			; Keep audio bits as is (no click)
	outs	5

CartridgeEntry: 

	dci	colordata
	lm
	xdc					; Store data counter for color in DC1

clearagain:
	lr	3, A
	pi	clrscrn



	dci	sample_buffer	; set data pointer to buffer
	clr
	com
	lr	0, A			;output_state = 0

outer_loop:
	clr				; 1  cycle
	am				; 2.5 cycles
	bz	end_sample
	lr	1, A			; 1  cycle		Sample counter stores data


	lr	A, 0			; 1  cycle		Fetch output state
	com				; 1  cycle		Invert output state
;	ni	%11000000		; 2.5 cycles	Only  keep the two sound bits
	lr	0, A			; 1  cycle		Store for next data invert

	outs	5			; 4 cycles		Put output state on port


	lr	A, 1			; 1c
	outs	1			; 2c	Color
	outs	4			; 4c	Column
	li	%11100001		; Set top two bits to 1
	ns	0			; And with r0 to set any 0 in top two
	outs	5			; 4c	Row
	lis	6			; 1c
	sl	4			; 1c
	outs	0			; 2c
	sl	1			; 1c
	outs	0			; 2c


inner_loop:
;	nop				; 1 cycle
;	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle
	nop				; 1 cycle


	ds	1			; 1.5 cycles	Decrease sample counter
	bnz	inner_loop		; 3.5 cycles branch, 3 cycles no branch
	br	outer_loop		; 3.5 cycles


end_sample:
	li	%00000000
	outs	5


	xdc				; back to color 
	clr
	am				; Add ram data to set flags
	xdc				; Change back
	bnz	clearagain		; Restart if not 0
	br	CartridgeEntry	; Start over

colordata:
	.byte $d6			; grey
	.byte $c0			; green
	.byte $21			; b/w
	.byte $93			; blue
	.byte 0
	.byte 0


;	jmp	CartridgeEntry
	
sample_buffer:
	include "tetris.smp.inc"
	.byte 0



;===========================================================================
; Signature 
;===========================================================================


	; signature
	org [$800 + [game_size * $400] -$10]

;signature:
	.byte "- e5frog - 2020 "

I converted this code that was given to me by utz (Sleizsa Duo/Trio):

  sample_pointer = sample_buffer
  output_state = 0

outer_loop:
  output_state = ~output_state
  sample_counter = [sample_pointer]
  ++sample_pointer

inner_loop:
  output_state -> port
  --sample_counter
  if sample_counter != 0
   goto inner_loop
  goto outer_loop

sample_buffer
  // PWM data goes here

sample_buffer is where the sample data starts, the end is marked with $00.

Sample data is made from wav by a program called wav2pwm.
https://github.com/JeffAlyanak/pcm2pwm/releases

I used a 44100kHz, 8-bit, mono-file saved as Windows PCM

I was considering using an address-bit for output and have a small speaker in the cart but... feature creep.

May 10

11 minutes ago, atari2601 said:

e5frog how can you do samples on channel f?

I can't, I haven't suceeded in doing so on a real machine, in emulation it works though, the emulation differs a lot from the real thing regarding sound.

Things need to be explored further.

April 29

50 minutes ago, atari2600land said:

How would the keyboard controller be put in if the controllers were hard-wired into the console?

It's my belief it would push people to get the Channel F II that has the external ports.

April 29

12 hours ago, atari2600land said:

Why was Galactic Space Wars and Pro Football described as Keyboard controllers when they apparently didn't need the keyboard controller because the games were released and the keyboard controller wasn't?

Seems a different version was planned according to images - and I'd guess they had to change things to an easier interface...?

Maybe there's remnants in the code...

11 hours ago, atari2600land said:

What is Microtronix?

I think it's just one of the resellers.

April 28

Ah, this one:

SUMMER
SPECIAL FLYER

Mentions the
Summer Special
is good through
Aug 31 1978

http://fndcollectables.com/CHANNEL_F_INFO/U_S_/Adds___Offers/LETTERS/f.jpg
http://fndcollectables.com/CHANNEL_F_INFO/U_S_/Adds___Offers/LETTERS/micenv1.jpg

MICROTRONIX
Summer Special Flyer & Order Form,
Includes Game #1 through 17 & 21
as being available

Also lists #18, 19, 20 & K1, K2, K3 as
(*) noted titles, these were not available
at the time of the flyer and were removed
with the exception of 18 & 20 from the
following Christmas flyer

I've got a Microtronix labeled cart somewhere, back label sticker.

April 28

21 minutes ago, atari2600land said:

The ad at the very top of this eBay listing looks interesting.

Looks interesting, feels familiar but I can't find it on Dennis' site (which is about to be killed off).
There's the unreleased keyboard carts on the list which sets the release time pretty well.

Fall 1978
http://fndcollectables.com/CHANNEL_F_INFO/U_S_/Adds___Offers/BROCHURES/brochures.html
http://fndcollectables.com/Fairchild/Brochures/cat2-outside-all.jpg
http://fndcollectables.com/Fairchild/Brochures/cat2-inside-all.jpg
CATALOG NUMBER
CI 202520

April 23

http://channelf.se/veswiki/index.php?title=Modding

April 23

3 minutes ago, CaptainBreakout said:

I've spent the last 40 minutes looking around the internet for a translation of the Saba Videocart-20 Schach (aka CHESS) instruction manual. Cannot find.

Anyone have a pdf of the instructions, or (better yet, since I only speak English real good) a translation?

Maybe someone here has a scan of the german instructions for this cart. That would be real fun to run thru google-translate... (Especially multiple times).

There's a summary in English "Superchess", it was posted in the Facebook group https://www.facebook.com/groups/1180282045468082.

Attached.
I have the German version in ascii here:

http://channelf.se/gallery/txt/saba20.txt

SABA Superchess.pdf

April 22

14 hours ago, CaptainBreakout said:

If you repro'd one and sent it back to 1979, would it become authentic? 🤔

:'D

April 21

39 minutes ago, atari2600land said:

Perhaps e5frog can have repro #19s for sale so we can complete all our sets?

Sure... wouldn't be very difficult but it would just be a place filler for the real thing - the real #19 would still be missing.

April 21

1 hour ago, CaptainBreakout said:

As for Sonar Search... I'll do a little more testing on it. If it turns out the cart is indeed flawed, I'll crack it open and look at the innards and report back here.

Most common problems on a semi working machine are oxidized socketed chips, RAM or power.

In your case it sounds like the cart connector assembly or flat cable _could be a problem.

For carts it's chip covers coming loose, rattling around inside the case tearing off bondwires.

April 20

49 minutes ago, CaptainBreakout said:

That's ok. I have a eprom programmer. Does anyone know what kind of eproms work in these things?

Imagine taking the actual chip out of the DIL IC-capsule, the eprom.

If you have the ones with a glass window you see the chip inside and thin wires around the edge mounted to a connection for the IC pins.

Such a tiny chip is glued to the P(rinted) C(ircuit) B(oard) - and the thin bondwires are attached directly to the PCB, then. there's a plastic cap protecting the entire assembly .

They aren't plain eproms but a logic device as well.

Unless you have bondwire equipment and a spare custom chip or backwards engineer one and order from a chip manufacturer - that's not an option.

atari2600land means you can swap the entire PCB, either from a donor or a brand new part built with old parts.

I have some loose spare PCBs, which ones where broken?

I can also make a reproduction board for all cames except a fully working Hangman - as it uses extra RAM and it hasn't been patched yet to work on the available platform. I got caught up with making a Swedish version when I was supposed to patch it...

Anyway, saving your own words in Hangman doesn't work on anything manufactured lately. (Maze has RAM as well and has been patches).

Most carts have two custom chips with half the data in either chip. Some late 20+ carts are suspected to use a plain eprom chip paired with a custom chip, mounted the same way. All game data is on that eprom.

April 19

Yup, after #8 is done. ;-)
I'm counting on getting a few more shipped this week.
I ordered cut out instructionbooklets but there has been some problems with that so I'm doing it old style... cutting with a knife guided by a ruler.

April 18

I'm at #8, others have been shipped.

March 6

Got the new label prints, they got it right this time.
I'll probably ship the first Videocart-28 after the weekend.

March 6

One chance left.

March 6

As I have gotten questions and I'm not making any more Multi-Carts this year since I'll be busy making Videocart-28, I'll sell the last two boards as well. Boards are already assembled and tested, just need to to finish shell and box.

So if you wanted one for Christmas, you have two chances.

March 2

Seems the message storage is full - I was assuming it threw out the oldest posts when it got there.
Send me an e-mail: [email protected]

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Posts posted by e5frog