Booter games bug

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Fenix77
Posts: 68
Joined: Fri 01 Sep, 2017 11:59 am

Booter games bug

Post by Fenix77 » Sun 14 Jan, 2018 12:12 am

Hello.

I found some bugs in booter games from 1984-85 and it seemed important to me report them. (i downloaded from retrograde station but the site is down since 2014)
both games support IBM PCjr 16 color graphics and 3 voice sound, and only
CGA 4 color and IBM speaker in the other machines.

I recently tested several 8088 machines in PCEM including PCjr. I found a bug in Bolderdash (The game is a booter disk it does not boot DOS).
The games, stars and works, but after finishing level 1 the game enters in a loop when trying to count the time back to 0; in fact, it keeps counting from 999 to 700 and again in 999. So I never arrive in 000 and gets stuck there.
The game works without any issue in dosbox.

Also Jumpman (its a booter too) works but is too fast in PCEM, even with an 8088 running at 4.77 mhz. It woks in dosbox too.

Thanks!

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omarsis81
Posts: 631
Joined: Thu 17 Dec, 2015 6:20 pm

Re: Booter games bug

Post by omarsis81 » Sun 14 Jan, 2018 5:21 pm

Maybe it is not a bug, but a copyprotection PCem can't handle

Fenix77
Posts: 68
Joined: Fri 01 Sep, 2017 11:59 am

Re: Booter games bug

Post by Fenix77 » Sun 14 Jan, 2018 10:04 pm

I tested Jumpman again and the speed problem occurs only in PCjr the 16 color RGB and 3 voice speaker works ok.
With other machines runs at correct speed on 8088 at 4.77 mhz. CGA composite color mode work correctly too, because it has the same colors than the screenshots on Mobygames site.

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